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authorFlorian Pritz <bluewind@xinu.at>2017-09-09 16:05:22 +0200
committerFlorian Pritz <bluewind@xinu.at>2017-09-09 16:05:22 +0200
commit27639d64d06b62f237bbde253c46cd28fdce8884 (patch)
tree7a2f00cfd44cfcdfe6cb1abc1cfc0675632948c4 /system/database/drivers/pdo
parent9c5bfbee5b42ea50a5611c537b8dbf01d7a64f79 (diff)
parent6c7a4266410070d30f8f6bcdf9c9e67f3d6478e3 (diff)
Merge tag '3.1.5' into dev-ci3
Signed-off-by: Florian Pritz <bluewind@xinu.at>
Diffstat (limited to 'system/database/drivers/pdo')
-rw-r--r--system/database/drivers/pdo/index.html3
-rw-r--r--system/database/drivers/pdo/pdo_driver.php774
-rw-r--r--system/database/drivers/pdo/pdo_forge.php283
-rw-r--r--system/database/drivers/pdo/pdo_result.php145
-rw-r--r--system/database/drivers/pdo/pdo_utility.php118
-rw-r--r--system/database/drivers/pdo/subdrivers/index.html11
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_4d_driver.php200
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_4d_forge.php217
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php209
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php230
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php337
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php149
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php279
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php237
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php244
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php154
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_informix_driver.php309
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_informix_forge.php163
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php374
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php256
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_oci_driver.php326
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_oci_forge.php176
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php229
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php70
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php384
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php210
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php219
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php238
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php369
-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php149
30 files changed, 6047 insertions, 1015 deletions
diff --git a/system/database/drivers/pdo/index.html b/system/database/drivers/pdo/index.html
index c942a79ce..b702fbc39 100644
--- a/system/database/drivers/pdo/index.html
+++ b/system/database/drivers/pdo/index.html
@@ -1,3 +1,4 @@
+<!DOCTYPE html>
<html>
<head>
<title>403 Forbidden</title>
@@ -7,4 +8,4 @@
<p>Directory access is forbidden.</p>
</body>
-</html> \ No newline at end of file
+</html>
diff --git a/system/database/drivers/pdo/pdo_driver.php b/system/database/drivers/pdo/pdo_driver.php
index e0e7dab65..6afc999c2 100644
--- a/system/database/drivers/pdo/pdo_driver.php
+++ b/system/database/drivers/pdo/pdo_driver.php
@@ -1,811 +1,329 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @author EllisLab Dev Team
- * @link http://codeigniter.com
- * @since Version 2.1.2
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 2.1.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PDO Database Adapter Class
*
* Note: _DB is an extender class that the app controller
- * creates dynamically based on whether the active record
+ * creates dynamically based on whether the query builder
* class is being used or not.
*
* @package CodeIgniter
* @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
- * @link http://codeigniter.com/user_guide/database/
+ * @link https://codeigniter.com/user_guide/database/
*/
class CI_DB_pdo_driver extends CI_DB {
- var $dbdriver = 'pdo';
-
- // the character used to excape - not necessary for PDO
- var $_escape_char = '';
- var $_like_escape_str;
- var $_like_escape_chr;
-
-
- /**
- * The syntax to count rows is slightly different across different
- * database engines, so this string appears in each driver and is
- * used for the count_all() and count_all_results() functions.
- */
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword;
-
- var $options = array();
-
- function __construct($params)
- {
- parent::__construct($params);
-
- // clause and character used for LIKE escape sequences
- if (strpos($this->hostname, 'mysql') !== FALSE)
- {
- $this->_like_escape_str = '';
- $this->_like_escape_chr = '';
-
- //Prior to this version, the charset can't be set in the dsn
- if(is_php('5.3.6'))
- {
- $this->hostname .= ";charset={$this->char_set}";
- }
-
- //Set the charset with the connection options
- $this->options['PDO::MYSQL_ATTR_INIT_COMMAND'] = "SET NAMES {$this->char_set}";
- }
- elseif (strpos($this->hostname, 'odbc') !== FALSE)
- {
- $this->_like_escape_str = " {escape '%s'} ";
- $this->_like_escape_chr = '!';
- }
- else
- {
- $this->_like_escape_str = " ESCAPE '%s' ";
- $this->_like_escape_chr = '!';
- }
-
- empty($this->database) OR $this->hostname .= ';dbname='.$this->database;
-
- $this->trans_enabled = FALSE;
-
- $this->_random_keyword = ' RND('.time().')'; // database specific random keyword
- }
-
/**
- * Non-persistent database connection
+ * Database driver
*
- * @access private called by the base class
- * @return resource
+ * @var string
*/
- function db_connect()
- {
- $this->options['PDO::ATTR_ERRMODE'] = PDO::ERRMODE_SILENT;
-
- return new PDO($this->hostname, $this->username, $this->password, $this->options);
- }
-
- // --------------------------------------------------------------------
+ public $dbdriver = 'pdo';
/**
- * Persistent database connection
+ * PDO Options
*
- * @access private called by the base class
- * @return resource
+ * @var array
*/
- function db_pconnect()
- {
- $this->options['PDO::ATTR_ERRMODE'] = PDO::ERRMODE_SILENT;
- $this->options['PDO::ATTR_PERSISTENT'] = TRUE;
-
- return new PDO($this->hostname, $this->username, $this->password, $this->options);
- }
+ public $options = array();
// --------------------------------------------------------------------
/**
- * Reconnect
+ * Class constructor
*
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
+ * Validates the DSN string and/or detects the subdriver.
*
- * @access public
+ * @param array $params
* @return void
*/
- function reconnect()
- {
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Select the database
- *
- * @access private called by the base class
- * @return resource
- */
- function db_select()
- {
- // Not needed for PDO
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Set client character set
- *
- * @access public
- * @param string
- * @param string
- * @return resource
- */
- function db_set_charset($charset, $collation)
- {
- // @todo - add support if needed
- return TRUE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Version number query string
- *
- * @access public
- * @return string
- */
- function _version()
- {
- return $this->conn_id->getAttribute(PDO::ATTR_CLIENT_VERSION);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Execute the query
- *
- * @access private called by the base class
- * @param string an SQL query
- * @return object
- */
- function _execute($sql)
+ public function __construct($params)
{
- $sql = $this->_prep_query($sql);
- $result_id = $this->conn_id->prepare($sql);
+ parent::__construct($params);
- if (is_object($result_id) && ($result = $result_id->execute()))
+ if (preg_match('/([^:]+):/', $this->dsn, $match) && count($match) === 2)
{
- if (is_numeric(stripos($sql, 'SELECT')))
- {
- $this->affect_rows = count($result_id->fetchAll());
- }
- else
- {
- $this->affect_rows = $result_id->rowCount();
- }
+ // If there is a minimum valid dsn string pattern found, we're done
+ // This is for general PDO users, who tend to have a full DSN string.
+ $this->subdriver = $match[1];
+ return;
}
- else
+ // Legacy support for DSN specified in the hostname field
+ elseif (preg_match('/([^:]+):/', $this->hostname, $match) && count($match) === 2)
{
- $this->affect_rows = 0;
- $result = FALSE;
+ $this->dsn = $this->hostname;
+ $this->hostname = NULL;
+ $this->subdriver = $match[1];
+ return;
}
-
- return $result;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
- * @param string an SQL query
- * @return string
- */
- function _prep_query($sql)
- {
- return $sql;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Begin Transaction
- *
- * @access public
- * @return bool
- */
- function trans_begin($test_mode = FALSE)
- {
- if ( ! $this->trans_enabled)
+ elseif (in_array($this->subdriver, array('mssql', 'sybase'), TRUE))
{
- return TRUE;
+ $this->subdriver = 'dblib';
}
-
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ elseif ($this->subdriver === '4D')
{
- return TRUE;
+ $this->subdriver = '4d';
}
-
- // Reset the transaction failure flag.
- // If the $test_mode flag is set to TRUE transactions will be rolled back
- // even if the queries produce a successful result.
- $this->_trans_failure = (bool) ($test_mode === TRUE);
-
- return $this->conn_id->beginTransaction();
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Commit Transaction
- *
- * @access public
- * @return bool
- */
- function trans_commit()
- {
- if ( ! $this->trans_enabled)
+ elseif ( ! in_array($this->subdriver, array('4d', 'cubrid', 'dblib', 'firebird', 'ibm', 'informix', 'mysql', 'oci', 'odbc', 'pgsql', 'sqlite', 'sqlsrv'), TRUE))
{
- return TRUE;
- }
+ log_message('error', 'PDO: Invalid or non-existent subdriver');
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
- {
- return TRUE;
+ if ($this->db_debug)
+ {
+ show_error('Invalid or non-existent PDO subdriver');
+ }
}
- $ret = $this->conn->commit();
- return $ret;
+ $this->dsn = NULL;
}
// --------------------------------------------------------------------
/**
- * Rollback Transaction
+ * Database connection
*
- * @access public
- * @return bool
+ * @param bool $persistent
+ * @return object
*/
- function trans_rollback()
+ public function db_connect($persistent = FALSE)
{
- if ( ! $this->trans_enabled)
+ if ($persistent === TRUE)
{
- return TRUE;
+ $this->options[PDO::ATTR_PERSISTENT] = TRUE;
}
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ try
{
- return TRUE;
+ return new PDO($this->dsn, $this->username, $this->password, $this->options);
}
-
- $ret = $this->conn_id->rollBack();
- return $ret;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Escape String
- *
- * @access public
- * @param string
- * @param bool whether or not the string will be used in a LIKE condition
- * @return string
- */
- function escape_str($str, $like = FALSE)
- {
- if (is_array($str))
+ catch (PDOException $e)
{
- foreach ($str as $key => $val)
+ if ($this->db_debug && empty($this->failover))
{
- $str[$key] = $this->escape_str($val, $like);
+ $this->display_error($e->getMessage(), '', TRUE);
}
- return $str;
- }
-
- //Escape the string
- $str = $this->conn_id->quote($str);
-
- //If there are duplicated quotes, trim them away
- if (strpos($str, "'") === 0)
- {
- $str = substr($str, 1, -1);
- }
-
- // escape LIKE condition wildcards
- if ($like === TRUE)
- {
- $str = str_replace( array('%', '_', $this->_like_escape_chr),
- array($this->_like_escape_chr.'%', $this->_like_escape_chr.'_', $this->_like_escape_chr.$this->_like_escape_chr),
- $str);
- }
-
- return $str;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Affected Rows
- *
- * @access public
- * @return integer
- */
- function affected_rows()
- {
- return $this->affect_rows;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert ID
- *
- * @access public
- * @return integer
- */
- function insert_id($name=NULL)
- {
- //Convenience method for postgres insertid
- if (strpos($this->hostname, 'pgsql') !== FALSE)
- {
- $v = $this->_version();
-
- $table = func_num_args() > 0 ? func_get_arg(0) : NULL;
-
- if ($table == NULL && $v >= '8.1')
- {
- $sql='SELECT LASTVAL() as ins_id';
- }
- $query = $this->query($sql);
- $row = $query->row();
- return $row->ins_id;
- }
- else
- {
- return $this->conn_id->lastInsertId($name);
+ return FALSE;
}
}
// --------------------------------------------------------------------
/**
- * "Count All" query
- *
- * Generates a platform-specific query string that counts all records in
- * the specified database
+ * Database version number
*
- * @access public
- * @param string
* @return string
*/
- function count_all($table = '')
+ public function version()
{
- if ($table == '')
+ if (isset($this->data_cache['version']))
{
- return 0;
+ return $this->data_cache['version'];
}
- $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
-
- if ($query->num_rows() == 0)
+ // Not all subdrivers support the getAttribute() method
+ try
{
- return 0;
+ return $this->data_cache['version'] = $this->conn_id->getAttribute(PDO::ATTR_SERVER_VERSION);
}
-
- $row = $query->row();
- $this->_reset_select();
- return (int) $row->numrows;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Show table query
- *
- * Generates a platform-specific query string so that the table names can be fetched
- *
- * @access private
- * @param boolean
- * @return string
- */
- function _list_tables($prefix_limit = FALSE)
- {
- $sql = "SHOW TABLES FROM `".$this->database."`";
-
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ catch (PDOException $e)
{
- //$sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%' ".sprintf($this->_like_escape_str, $this->_like_escape_chr);
- return FALSE; // not currently supported
+ return parent::version();
}
-
- return $sql;
}
// --------------------------------------------------------------------
/**
- * Show column query
- *
- * Generates a platform-specific query string so that the column names can be fetched
+ * Execute the query
*
- * @access public
- * @param string the table name
- * @return string
+ * @param string $sql SQL query
+ * @return mixed
*/
- function _list_columns($table = '')
+ protected function _execute($sql)
{
- return "SHOW COLUMNS FROM ".$table;
+ return $this->conn_id->query($sql);
}
// --------------------------------------------------------------------
/**
- * Field data query
- *
- * Generates a platform-specific query so that the column data can be retrieved
+ * Begin Transaction
*
- * @access public
- * @param string the table name
- * @return object
+ * @return bool
*/
- function _field_data($table)
+ protected function _trans_begin()
{
- return "SELECT TOP 1 FROM ".$table;
+ return $this->conn_id->beginTransaction();
}
// --------------------------------------------------------------------
/**
- * The error message string
+ * Commit Transaction
*
- * @access private
- * @return string
+ * @return bool
*/
- function _error_message()
+ protected function _trans_commit()
{
- $error_array = $this->conn_id->errorInfo();
- return $error_array[2];
+ return $this->conn_id->commit();
}
// --------------------------------------------------------------------
/**
- * The error message number
+ * Rollback Transaction
*
- * @access private
- * @return integer
+ * @return bool
*/
- function _error_number()
+ protected function _trans_rollback()
{
- return $this->conn_id->errorCode();
+ return $this->conn_id->rollBack();
}
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
+ * Platform-dependent string escape
*
- * @access private
* @param string
* @return string
*/
- function _escape_identifiers($item)
+ protected function _escape_str($str)
{
- if ($this->_escape_char == '')
- {
- return $item;
- }
-
- foreach ($this->_reserved_identifiers as $id)
- {
- if (strpos($item, '.'.$id) !== FALSE)
- {
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
- }
-
- if (strpos($item, '.') !== FALSE)
- {
- $str = $this->_escape_char.str_replace('.', $this->_escape_char.'.'.$this->_escape_char, $item).$this->_escape_char;
-
- }
- else
- {
- $str = $this->_escape_char.$item.$this->_escape_char;
- }
+ // Escape the string
+ $str = $this->conn_id->quote($str);
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ // If there are duplicated quotes, trim them away
+ return ($str[0] === "'")
+ ? substr($str, 1, -1)
+ : $str;
}
// --------------------------------------------------------------------
/**
- * From Tables
- *
- * This function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
+ * Affected Rows
*
- * @access public
- * @param type
- * @return type
+ * @return int
*/
- function _from_tables($tables)
+ public function affected_rows()
{
- if ( ! is_array($tables))
- {
- $tables = array($tables);
- }
-
- return (count($tables) == 1) ? $tables[0] : '('.implode(', ', $tables).')';
+ return is_object($this->result_id) ? $this->result_id->rowCount() : 0;
}
// --------------------------------------------------------------------
/**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _insert($table, $keys, $values)
- {
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert_batch statement
- *
- * Generates a platform-specific insert string from the supplied data
+ * Insert ID
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
+ * @param string $name
+ * @return int
*/
- function _insert_batch($table, $keys, $values)
+ public function insert_id($name = NULL)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
+ return $this->conn_id->lastInsertId($name);
}
// --------------------------------------------------------------------
/**
- * Update statement
+ * Field data query
*
- * Generates a platform-specific update string from the supplied data
+ * Generates a platform-specific query so that the column data can be retrieved
*
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
+ * @param string $table
* @return string
*/
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
+ protected function _field_data($table)
{
- foreach ($values as $key => $val)
- {
- $valstr[] = $key." = ".$val;
- }
-
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- $orderby = (count($orderby) >= 1)?' ORDER BY '.implode(", ", $orderby):'';
-
- $sql = "UPDATE ".$table." SET ".implode(', ', $valstr);
-
- $sql .= ($where != '' AND count($where) >=1) ? " WHERE ".implode(" ", $where) : '';
-
- $sql .= $orderby.$limit;
-
- return $sql;
+ return 'SELECT TOP 1 * FROM '.$this->protect_identifiers($table);
}
-
+
// --------------------------------------------------------------------
/**
- * Update_Batch statement
+ * Error
*
- * Generates a platform-specific batch update string from the supplied data
+ * Returns an array containing code and message of the last
+ * database error that has occurred.
*
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @return string
+ * @return array
*/
- function _update_batch($table, $values, $index, $where = NULL)
+ public function error()
{
- $ids = array();
- $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : '';
+ $error = array('code' => '00000', 'message' => '');
+ $pdo_error = $this->conn_id->errorInfo();
- foreach ($values as $key => $val)
+ if (empty($pdo_error[0]))
{
- $ids[] = $val[$index];
-
- foreach (array_keys($val) as $field)
- {
- if ($field != $index)
- {
- $final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
- }
- }
+ return $error;
}
- $sql = "UPDATE ".$table." SET ";
- $cases = '';
-
- foreach ($final as $k => $v)
+ $error['code'] = isset($pdo_error[1]) ? $pdo_error[0].'/'.$pdo_error[1] : $pdo_error[0];
+ if (isset($pdo_error[2]))
{
- $cases .= $k.' = CASE '."\n";
- foreach ($v as $row)
- {
- $cases .= $row."\n";
- }
-
- $cases .= 'ELSE '.$k.' END, ';
+ $error['message'] = $pdo_error[2];
}
- $sql .= substr($cases, 0, -2);
-
- $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';
-
- return $sql;
+ return $error;
}
-
// --------------------------------------------------------------------
/**
* Truncate statement
*
* Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
- *
- * @access public
- * @param string the table name
- * @return string
- */
- function _truncate($table)
- {
- return $this->_delete($table);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete statement
- *
- * Generates a platform-specific delete string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the where clause
- * @param string the limit clause
- * @return string
- */
- function _delete($table, $where = array(), $like = array(), $limit = FALSE)
- {
- $conditions = '';
-
- if (count($where) > 0 OR count($like) > 0)
- {
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
-
- if (count($where) > 0 && count($like) > 0)
- {
- $conditions .= " AND ";
- }
- $conditions .= implode("\n", $like);
- }
-
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return "DELETE FROM ".$table.$conditions.$limit;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Limit string
*
- * Generates a platform-specific LIMIT clause
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
*
- * @access public
- * @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
+ * @param string $table
* @return string
*/
- function _limit($sql, $limit, $offset)
- {
- if (strpos($this->hostname, 'cubrid') !== FALSE || strpos($this->hostname, 'sqlite') !== FALSE)
- {
- if ($offset == 0)
- {
- $offset = '';
- }
- else
- {
- $offset .= ", ";
- }
-
- return $sql."LIMIT ".$offset.$limit;
- }
- else
- {
- $sql .= "LIMIT ".$limit;
-
- if ($offset > 0)
- {
- $sql .= " OFFSET ".$offset;
- }
-
- return $sql;
- }
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Close DB Connection
- *
- * @access public
- * @param resource
- * @return void
- */
- function _close($conn_id)
+ protected function _truncate($table)
{
- $this->conn_id = null;
+ return 'TRUNCATE TABLE '.$table;
}
-
}
-
-
-
-/* End of file pdo_driver.php */
-/* Location: ./system/database/drivers/pdo/pdo_driver.php */ \ No newline at end of file
diff --git a/system/database/drivers/pdo/pdo_forge.php b/system/database/drivers/pdo/pdo_forge.php
index f7beb0a9a..685b6776d 100644
--- a/system/database/drivers/pdo/pdo_forge.php
+++ b/system/database/drivers/pdo/pdo_forge.php
@@ -1,266 +1,65 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @author EllisLab Dev Team
- * @link http://codeigniter.com
- * @since Version 2.1.2
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 2.1.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PDO Forge Class
*
+ * @package CodeIgniter
+ * @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
- * @link http://codeigniter.com/database/
+ * @link https://codeigniter.com/database/
*/
class CI_DB_pdo_forge extends CI_DB_forge {
/**
- * Create database
- *
- * @access private
- * @param string the database name
- * @return bool
- */
- function _create_database()
- {
- // PDO has no "create database" command since it's
- // designed to connect to an existing database
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Drop database
- *
- * @access private
- * @param string the database name
- * @return bool
- */
- function _drop_database($name)
- {
- // PDO has no "drop database" command since it's
- // designed to connect to an existing database
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Create Table
- *
- * @access private
- * @param string the table name
- * @param array the fields
- * @param mixed primary key(s)
- * @param mixed key(s)
- * @param boolean should 'IF NOT EXISTS' be added to the SQL
- * @return bool
- */
- function _create_table($table, $fields, $primary_keys, $keys, $if_not_exists)
- {
- $sql = 'CREATE TABLE ';
-
- if ($if_not_exists === TRUE)
- {
- $sql .= 'IF NOT EXISTS ';
- }
-
- $sql .= $this->db->_escape_identifiers($table)." (";
- $current_field_count = 0;
-
- foreach ($fields as $field=>$attributes)
- {
- // Numeric field names aren't allowed in databases, so if the key is
- // numeric, we know it was assigned by PHP and the developer manually
- // entered the field information, so we'll simply add it to the list
- if (is_numeric($field))
- {
- $sql .= "\n\t$attributes";
- }
- else
- {
- $attributes = array_change_key_case($attributes, CASE_UPPER);
-
- $sql .= "\n\t".$this->db->_protect_identifiers($field);
-
- $sql .= ' '.$attributes['TYPE'];
-
- if (array_key_exists('CONSTRAINT', $attributes))
- {
- $sql .= '('.$attributes['CONSTRAINT'].')';
- }
-
- if (array_key_exists('UNSIGNED', $attributes) && $attributes['UNSIGNED'] === TRUE)
- {
- $sql .= ' UNSIGNED';
- }
-
- if (array_key_exists('DEFAULT', $attributes))
- {
- $sql .= ' DEFAULT \''.$attributes['DEFAULT'].'\'';
- }
-
- if (array_key_exists('NULL', $attributes) && $attributes['NULL'] === TRUE)
- {
- $sql .= ' NULL';
- }
- else
- {
- $sql .= ' NOT NULL';
- }
-
- if (array_key_exists('AUTO_INCREMENT', $attributes) && $attributes['AUTO_INCREMENT'] === TRUE)
- {
- $sql .= ' AUTO_INCREMENT';
- }
- }
-
- // don't add a comma on the end of the last field
- if (++$current_field_count < count($fields))
- {
- $sql .= ',';
- }
- }
-
- if (count($primary_keys) > 0)
- {
- $primary_keys = $this->db->_protect_identifiers($primary_keys);
- $sql .= ",\n\tPRIMARY KEY (" . implode(', ', $primary_keys) . ")";
- }
-
- if (is_array($keys) && count($keys) > 0)
- {
- foreach ($keys as $key)
- {
- if (is_array($key))
- {
- $key = $this->db->_protect_identifiers($key);
- }
- else
- {
- $key = array($this->db->_protect_identifiers($key));
- }
-
- $sql .= ",\n\tFOREIGN KEY (" . implode(', ', $key) . ")";
- }
- }
-
- $sql .= "\n)";
-
- return $sql;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Drop Table
+ * CREATE TABLE IF statement
*
- * @access private
- * @return bool
+ * @var string
*/
- function _drop_table($table)
- {
- // Not a supported PDO feature
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
+ protected $_create_table_if = FALSE;
/**
- * Alter table query
+ * DROP TABLE IF statement
*
- * Generates a platform-specific query so that a table can be altered
- * Called by add_column(), drop_column(), and column_alter(),
- *
- * @access private
- * @param string the ALTER type (ADD, DROP, CHANGE)
- * @param string the column name
- * @param string the table name
- * @param string the column definition
- * @param string the default value
- * @param boolean should 'NOT NULL' be added
- * @param string the field after which we should add the new field
- * @return object
+ * @var string
*/
- function _alter_table($alter_type, $table, $column_name, $column_definition = '', $default_value = '', $null = '', $after_field = '')
- {
- $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table)." $alter_type ".$this->db->_protect_identifiers($column_name);
-
- // DROP has everything it needs now.
- if ($alter_type == 'DROP')
- {
- return $sql;
- }
-
- $sql .= " $column_definition";
-
- if ($default_value != '')
- {
- $sql .= " DEFAULT \"$default_value\"";
- }
-
- if ($null === NULL)
- {
- $sql .= ' NULL';
- }
- else
- {
- $sql .= ' NOT NULL';
- }
-
- if ($after_field != '')
- {
- $sql .= ' AFTER ' . $this->db->_protect_identifiers($after_field);
- }
-
- return $sql;
-
- }
-
-
- // --------------------------------------------------------------------
-
- /**
- * Rename a table
- *
- * Generates a platform-specific query so that a table can be renamed
- *
- * @access private
- * @param string the old table name
- * @param string the new table name
- * @return string
- */
- function _rename_table($table_name, $new_table_name)
- {
- $sql = 'ALTER TABLE '.$this->db->_protect_identifiers($table_name)." RENAME TO ".$this->db->_protect_identifiers($new_table_name);
- return $sql;
- }
-
+ protected $_drop_table_if = FALSE;
}
-
-/* End of file pdo_forge.php */
-/* Location: ./system/database/drivers/pdo/pdo_forge.php */ \ No newline at end of file
diff --git a/system/database/drivers/pdo/pdo_result.php b/system/database/drivers/pdo/pdo_result.php
index 4843df43b..bbc2cdc5a 100644
--- a/system/database/drivers/pdo/pdo_result.php
+++ b/system/database/drivers/pdo/pdo_result.php
@@ -1,33 +1,55 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @author EllisLab Dev Team
- * @link http://codeigniter.com
- * @since Version 2.1.2
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 2.1.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PDO Result Class
*
* This class extends the parent result class: CI_DB_result
*
+ * @package CodeIgniter
+ * @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
- * @link http://codeigniter.com/user_guide/database/
+ * @link https://codeigniter.com/user_guide/database/
*/
class CI_DB_pdo_result extends CI_DB_result {
- public $num_rows;
-
/**
* Number of rows in the result set
*
@@ -39,14 +61,20 @@ class CI_DB_pdo_result extends CI_DB_result {
{
return $this->num_rows;
}
- elseif (($this->num_rows = $this->result_id->rowCount()) > 0)
+ elseif (count($this->result_array) > 0)
{
- return $this->num_rows;
+ return $this->num_rows = count($this->result_array);
+ }
+ elseif (count($this->result_object) > 0)
+ {
+ return $this->num_rows = count($this->result_object);
+ }
+ elseif (($num_rows = $this->result_id->rowCount()) > 0)
+ {
+ return $this->num_rows = $num_rows;
}
- $this->num_rows = count($this->result_id->fetchAll());
- $this->result_id->execute();
- return $this->num_rows;
+ return $this->num_rows = count($this->result_array());
}
// --------------------------------------------------------------------
@@ -54,10 +82,9 @@ class CI_DB_pdo_result extends CI_DB_result {
/**
* Number of fields in the result set
*
- * @access public
- * @return integer
+ * @return int
*/
- function num_fields()
+ public function num_fields()
{
return $this->result_id->columnCount();
}
@@ -69,16 +96,20 @@ class CI_DB_pdo_result extends CI_DB_result {
*
* Generates an array of column names
*
- * @access public
- * @return array
+ * @return bool
*/
- function list_fields()
+ public function list_fields()
{
- if ($this->db->db_debug)
+ $field_names = array();
+ for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
{
- return $this->db->display_error('db_unsuported_feature');
+ // Might trigger an E_WARNING due to not all subdrivers
+ // supporting getColumnMeta()
+ $field_names[$i] = @$this->result_id->getColumnMeta($i);
+ $field_names[$i] = $field_names[$i]['name'];
}
- return FALSE;
+
+ return $field_names;
}
// --------------------------------------------------------------------
@@ -88,28 +119,34 @@ class CI_DB_pdo_result extends CI_DB_result {
*
* Generates an array of objects containing field meta-data
*
- * @access public
* @return array
*/
- function field_data()
+ public function field_data()
{
- $data = array();
-
try
{
- for($i = 0; $i < $this->num_fields(); $i++)
+ $retval = array();
+
+ for ($i = 0, $c = $this->num_fields(); $i < $c; $i++)
{
- $data[] = $this->result_id->getColumnMeta($i);
+ $field = $this->result_id->getColumnMeta($i);
+
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $field['name'];
+ $retval[$i]->type = $field['native_type'];
+ $retval[$i]->max_length = ($field['len'] > 0) ? $field['len'] : NULL;
+ $retval[$i]->primary_key = (int) ( ! empty($field['flags']) && in_array('primary_key', $field['flags'], TRUE));
}
-
- return $data;
+
+ return $retval;
}
catch (Exception $e)
{
if ($this->db->db_debug)
{
- return $this->db->display_error('db_unsuported_feature');
+ return $this->db->display_error('db_unsupported_feature');
}
+
return FALSE;
}
}
@@ -119,9 +156,9 @@ class CI_DB_pdo_result extends CI_DB_result {
/**
* Free the result
*
- * @return null
+ * @return void
*/
- function free_result()
+ public function free_result()
{
if (is_object($this->result_id))
{
@@ -132,31 +169,13 @@ class CI_DB_pdo_result extends CI_DB_result {
// --------------------------------------------------------------------
/**
- * Data Seek
- *
- * Moves the internal pointer to the desired offset. We call
- * this internally before fetching results to make sure the
- * result set starts at zero
- *
- * @access private
- * @return array
- */
- function _data_seek($n = 0)
- {
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
* Result - associative array
*
* Returns the result set as an array
*
- * @access private
* @return array
*/
- function _fetch_assoc()
+ protected function _fetch_assoc()
{
return $this->result_id->fetch(PDO::FETCH_ASSOC);
}
@@ -168,16 +187,12 @@ class CI_DB_pdo_result extends CI_DB_result {
*
* Returns the result set as an object
*
- * @access private
+ * @param string $class_name
* @return object
*/
- function _fetch_object()
- {
- return $this->result_id->fetchObject();
+ protected function _fetch_object($class_name = 'stdClass')
+ {
+ return $this->result_id->fetchObject($class_name);
}
}
-
-
-/* End of file pdo_result.php */
-/* Location: ./system/database/drivers/pdo/pdo_result.php */ \ No newline at end of file
diff --git a/system/database/drivers/pdo/pdo_utility.php b/system/database/drivers/pdo/pdo_utility.php
index 042ccef8d..5029cac94 100644
--- a/system/database/drivers/pdo/pdo_utility.php
+++ b/system/database/drivers/pdo/pdo_utility.php
@@ -1,103 +1,63 @@
-<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
+<?php
/**
* CodeIgniter
*
- * An open source application development framework for PHP 5.1.6 or newer
+ * An open source application development framework for PHP
*
- * @package CodeIgniter
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @author EllisLab Dev Team
- * @link http://codeigniter.com
- * @since Version 2.1.2
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 2.1.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* PDO Utility Class
*
+ * @package CodeIgniter
+ * @subpackage Drivers
* @category Database
* @author EllisLab Dev Team
- * @link http://codeigniter.com/database/
+ * @link https://codeigniter.com/database/
*/
class CI_DB_pdo_utility extends CI_DB_utility {
/**
- * List databases
- *
- * @access private
- * @return bool
- */
- function _list_databases()
- {
- // Not sure if PDO lets you list all databases...
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Optimize table query
- *
- * Generates a platform-specific query so that a table can be optimized
+ * Export
*
- * @access private
- * @param string the table name
- * @return object
- */
- function _optimize_table($table)
- {
- // Not a supported PDO feature
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Repair table query
- *
- * Generates a platform-specific query so that a table can be repaired
- *
- * @access private
- * @param string the table name
- * @return object
- */
- function _repair_table($table)
- {
- // Not a supported PDO feature
- if ($this->db->db_debug)
- {
- return $this->db->display_error('db_unsuported_feature');
- }
- return FALSE;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * PDO Export
- *
- * @access private
- * @param array Preferences
+ * @param array $params Preferences
* @return mixed
*/
- function _backup($params = array())
+ protected function _backup($params = array())
{
// Currently unsupported
- return $this->db->display_error('db_unsuported_feature');
+ return $this->db->display_error('db_unsupported_feature');
}
}
-
-/* End of file pdo_utility.php */
-/* Location: ./system/database/drivers/pdo/pdo_utility.php */ \ No newline at end of file
diff --git a/system/database/drivers/pdo/subdrivers/index.html b/system/database/drivers/pdo/subdrivers/index.html
new file mode 100644
index 000000000..b702fbc39
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/index.html
@@ -0,0 +1,11 @@
+<!DOCTYPE html>
+<html>
+<head>
+ <title>403 Forbidden</title>
+</head>
+<body>
+
+<p>Directory access is forbidden.</p>
+
+</body>
+</html>
diff --git a/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
new file mode 100644
index 000000000..7eaeaa1fd
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_4d_driver.php
@@ -0,0 +1,200 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO 4D Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_4d_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = '4d';
+
+ /**
+ * Identifier escape character
+ *
+ * @var string[]
+ */
+ protected $_escape_char = array('[', ']');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = '4D:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ empty($this->port) OR $this->dsn .= ';port='.$this->port;
+ empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ }
+ elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 3) === FALSE)
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT '.$this->escape_identifiers('TABLE_NAME').' FROM '.$this->escape_identifiers('_USER_TABLES');
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ $sql .= ' WHERE '.$this->escape_identifiers('TABLE_NAME')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT '.$this->escape_identifiers('COLUMN_NAME').' FROM '.$this->escape_identifiers('_USER_COLUMNS')
+ .' WHERE '.$this->escape_identifiers('TABLE_NAME').' = '.$this->escape($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field data query
+ *
+ * Generates a platform-specific query so that the column data can be retrieved
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _field_data($table)
+ {
+ return 'SELECT * FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE).' LIMIT 1';
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ return $sql.' LIMIT '.$this->qb_limit.($this->qb_offset ? ' OFFSET '.$this->qb_offset : '');
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php b/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php
new file mode 100644
index 000000000..3f636d3bd
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_4d_forge.php
@@ -0,0 +1,217 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO 4D Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_4d_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE DATABASE statement
+ *
+ * @var string
+ */
+ protected $_create_database = 'CREATE SCHEMA %s';
+
+ /**
+ * DROP DATABASE statement
+ *
+ * @var string
+ */
+ protected $_drop_database = 'DROP SCHEMA %s';
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS';
+
+ /**
+ * RENAME TABLE statement
+ *
+ * @var string
+ */
+ protected $_rename_table = FALSE;
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'INT16' => 'INT',
+ 'SMALLINT' => 'INT',
+ 'INT' => 'INT64',
+ 'INT32' => 'INT64'
+ );
+
+ /**
+ * DEFAULT value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_default = FALSE;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ // No method of modifying columns is supported
+ return FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ return $this->db->escape_identifiers($field['name'])
+ .' '.$field['type'].$field['length']
+ .$field['null']
+ .$field['unique']
+ .$field['auto_increment'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'INTEGER':
+ $attributes['TYPE'] = 'INT';
+ return;
+ case 'BIGINT':
+ $attributes['TYPE'] = 'INT64';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute UNIQUE
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_unique(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
+ {
+ $field['unique'] = ' UNIQUE';
+
+ // UNIQUE must be used with NOT NULL
+ $field['null'] = ' NOT NULL';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
+ {
+ if (stripos($field['type'], 'int') !== FALSE)
+ {
+ $field['auto_increment'] = ' AUTO_INCREMENT';
+ }
+ elseif (strcasecmp($field['type'], 'UUID') === 0)
+ {
+ $field['auto_increment'] = ' AUTO_GENERATE';
+ }
+ }
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
new file mode 100644
index 000000000..fc49e0dd0
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_driver.php
@@ -0,0 +1,209 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO CUBRID Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_cubrid_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'cubrid';
+
+ /**
+ * Identifier escape character
+ *
+ * @var string
+ */
+ protected $_escape_char = '`';
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('RANDOM()', 'RANDOM(%d)');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'cubrid:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ empty($this->port) OR $this->dsn .= ';port='.$this->port;
+ empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SHOW TABLES';
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->Field;
+
+ sscanf($query[$i]->Type, '%[a-z](%d)',
+ $retval[$i]->type,
+ $retval[$i]->max_length
+ );
+
+ $retval[$i]->default = $query[$i]->Default;
+ $retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ *
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _truncate($table)
+ {
+ return 'TRUNCATE '.$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * FROM tables
+ *
+ * Groups tables in FROM clauses if needed, so there is no confusion
+ * about operator precedence.
+ *
+ * @return string
+ */
+ protected function _from_tables()
+ {
+ if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
+ {
+ return '('.implode(', ', $this->qb_from).')';
+ }
+
+ return implode(', ', $this->qb_from);
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php b/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php
new file mode 100644
index 000000000..276cbb6bc
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_cubrid_forge.php
@@ -0,0 +1,230 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO CUBRID Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_cubrid_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE DATABASE statement
+ *
+ * @var string
+ */
+ protected $_create_database = FALSE;
+
+ /**
+ * DROP DATABASE statement
+ *
+ * @var string
+ */
+ protected $_drop_database = FALSE;
+
+ /**
+ * CREATE TABLE keys flag
+ *
+ * Whether table keys are created from within the
+ * CREATE TABLE statement.
+ *
+ * @var bool
+ */
+ protected $_create_table_keys = TRUE;
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'SHORT' => 'INTEGER',
+ 'SMALLINT' => 'INTEGER',
+ 'INT' => 'BIGINT',
+ 'INTEGER' => 'BIGINT',
+ 'BIGINT' => 'NUMERIC',
+ 'FLOAT' => 'DOUBLE',
+ 'REAL' => 'DOUBLE'
+ );
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('DROP', 'ADD'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ if ($field[$i]['_literal'] !== FALSE)
+ {
+ $sqls[] = $sql.' CHANGE '.$field[$i]['_literal'];
+ }
+ else
+ {
+ $alter_type = empty($field[$i]['new_name']) ? ' MODIFY ' : ' CHANGE ';
+ $sqls[] = $sql.$alter_type.$this->_process_column($field[$i]);
+ }
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ $extra_clause = isset($field['after'])
+ ? ' AFTER '.$this->db->escape_identifiers($field['after']) : '';
+
+ if (empty($extra_clause) && isset($field['first']) && $field['first'] === TRUE)
+ {
+ $extra_clause = ' FIRST';
+ }
+
+ return $this->db->escape_identifiers($field['name'])
+ .(empty($field['new_name']) ? '' : ' '.$this->db->escape_identifiers($field['new_name']))
+ .' '.$field['type'].$field['length']
+ .$field['unsigned']
+ .$field['null']
+ .$field['default']
+ .$field['auto_increment']
+ .$field['unique']
+ .$extra_clause;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'LONGTEXT':
+ $attributes['TYPE'] = 'STRING';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process indexes
+ *
+ * @param string $table (ignored)
+ * @return string
+ */
+ protected function _process_indexes($table)
+ {
+ $sql = '';
+
+ for ($i = 0, $c = count($this->keys); $i < $c; $i++)
+ {
+ if (is_array($this->keys[$i]))
+ {
+ for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++)
+ {
+ if ( ! isset($this->fields[$this->keys[$i][$i2]]))
+ {
+ unset($this->keys[$i][$i2]);
+ continue;
+ }
+ }
+ }
+ elseif ( ! isset($this->fields[$this->keys[$i]]))
+ {
+ unset($this->keys[$i]);
+ continue;
+ }
+
+ is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]);
+
+ $sql .= ",\n\tKEY ".$this->db->escape_identifiers(implode('_', $this->keys[$i]))
+ .' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).')';
+ }
+
+ $this->keys = array();
+
+ return $sql;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
new file mode 100644
index 000000000..08243232e
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_driver.php
@@ -0,0 +1,337 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO DBLIB Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_dblib_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'dblib';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('NEWID()', 'RAND(%d)');
+
+ /**
+ * Quoted identifier flag
+ *
+ * Whether to use SQL-92 standard quoted identifier
+ * (double quotes) or brackets for identifier escaping.
+ *
+ * @var bool
+ */
+ protected $_quoted_identifier;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = $params['subdriver'].':host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ if ( ! empty($this->port))
+ {
+ $this->dsn .= (DIRECTORY_SEPARATOR === '\\' ? ',' : ':').$this->port;
+ }
+
+ empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ empty($this->appname) OR $this->dsn .= ';appname='.$this->appname;
+ }
+ else
+ {
+ if ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE)
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+
+ $this->subdriver = 'dblib';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database connection
+ *
+ * @param bool $persistent
+ * @return object
+ */
+ public function db_connect($persistent = FALSE)
+ {
+ if ($persistent === TRUE)
+ {
+ log_message('debug', "dblib driver doesn't support persistent connections");
+ }
+
+ $this->conn_id = parent::db_connect(FALSE);
+
+ if ( ! is_object($this->conn_id))
+ {
+ return $this->conn_id;
+ }
+
+ // Determine how identifiers are escaped
+ $query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
+ $query = $query->row_array();
+ $this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
+ $this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
+
+ return $this->conn_id;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT '.$this->escape_identifiers('name')
+ .' FROM '.$this->escape_identifiers('sysobjects')
+ .' WHERE '.$this->escape_identifiers('type')." = 'U'";
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ $sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql.' ORDER BY '.$this->escape_identifiers('name');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT COLUMN_NAME
+ FROM INFORMATION_SCHEMA.Columns
+ WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, COLUMN_DEFAULT
+ FROM INFORMATION_SCHEMA.Columns
+ WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+
+ if (($query = $this->query($sql)) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->COLUMN_NAME;
+ $retval[$i]->type = $query[$i]->DATA_TYPE;
+ $retval[$i]->max_length = ($query[$i]->CHARACTER_MAXIMUM_LENGTH > 0) ? $query[$i]->CHARACTER_MAXIMUM_LENGTH : $query[$i]->NUMERIC_PRECISION;
+ $retval[$i]->default = $query[$i]->COLUMN_DEFAULT;
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ if ($this->qb_limit)
+ {
+ return 'WITH ci_delete AS (SELECT TOP '.$this->qb_limit.' * FROM '.$table.$this->_compile_wh('qb_where').') DELETE FROM ci_delete';
+ }
+
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ $limit = $this->qb_offset + $this->qb_limit;
+
+ // As of SQL Server 2005 (9.0.*) ROW_NUMBER() is supported,
+ // however an ORDER BY clause is required for it to work
+ if (version_compare($this->version(), '9', '>=') && $this->qb_offset && ! empty($this->qb_orderby))
+ {
+ $orderby = $this->_compile_order_by();
+
+ // We have to strip the ORDER BY clause
+ $sql = trim(substr($sql, 0, strrpos($sql, $orderby)));
+
+ // Get the fields to select from our subquery, so that we can avoid CI_rownum appearing in the actual results
+ if (count($this->qb_select) === 0)
+ {
+ $select = '*'; // Inevitable
+ }
+ else
+ {
+ // Use only field names and their aliases, everything else is out of our scope.
+ $select = array();
+ $field_regexp = ($this->_quoted_identifier)
+ ? '("[^\"]+")' : '(\[[^\]]+\])';
+ for ($i = 0, $c = count($this->qb_select); $i < $c; $i++)
+ {
+ $select[] = preg_match('/(?:\s|\.)'.$field_regexp.'$/i', $this->qb_select[$i], $m)
+ ? $m[1] : $this->qb_select[$i];
+ }
+ $select = implode(', ', $select);
+ }
+
+ return 'SELECT '.$select." FROM (\n\n"
+ .preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.trim($orderby).') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
+ ."\n\n) ".$this->escape_identifiers('CI_subquery')
+ ."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.($this->qb_offset + 1).' AND '.$limit;
+ }
+
+ return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert batch statement
+ *
+ * Generates a platform-specific insert string from the supplied data.
+ *
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
+ * @return string|bool
+ */
+ protected function _insert_batch($table, $keys, $values)
+ {
+ // Multiple-value inserts are only supported as of SQL Server 2008
+ if (version_compare($this->version(), '10', '>='))
+ {
+ return parent::_insert_batch($table, $keys, $values);
+ }
+
+ return ($this->db_debug) ? $this->display_error('db_unsupported_feature') : FALSE;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php b/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php
new file mode 100644
index 000000000..d0cca38dd
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_dblib_forge.php
@@ -0,0 +1,149 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO DBLIB Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_dblib_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = "IF NOT EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nCREATE TABLE";
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = "IF EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nDROP TABLE";
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'TINYINT' => 'SMALLINT',
+ 'SMALLINT' => 'INT',
+ 'INT' => 'BIGINT',
+ 'REAL' => 'FLOAT'
+ );
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ALTER COLUMN ';
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ $sqls[] = $sql.$this->_process_column($field[$i]);
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ if (isset($attributes['CONSTRAINT']) && strpos($attributes['TYPE'], 'INT') !== FALSE)
+ {
+ unset($attributes['CONSTRAINT']);
+ }
+
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'INTEGER':
+ $attributes['TYPE'] = 'INT';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
+ {
+ $field['auto_increment'] = ' IDENTITY(1,1)';
+ }
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
new file mode 100644
index 000000000..cb93f19b7
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_driver.php
@@ -0,0 +1,279 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Firebird Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_firebird_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'firebird';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('RAND()', 'RAND()');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'firebird:';
+
+ if ( ! empty($this->database))
+ {
+ $this->dsn .= 'dbname='.$this->database;
+ }
+ elseif ( ! empty($this->hostname))
+ {
+ $this->dsn .= 'dbname='.$this->hostname;
+ }
+
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ empty($this->role) OR $this->dsn .= ';role='.$this->role;
+ }
+ elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 9) === FALSE)
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "RDB$RELATION_NAME" FROM "RDB$RELATIONS" WHERE "RDB$RELATION_NAME" NOT LIKE \'RDB$%\' AND "RDB$RELATION_NAME" NOT LIKE \'MON$%\'';
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql.' AND "RDB$RELATION_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT "RDB$FIELD_NAME" FROM "RDB$RELATION_FIELDS" WHERE "RDB$RELATION_NAME" = '.$this->escape($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT "rfields"."RDB$FIELD_NAME" AS "name",
+ CASE "fields"."RDB$FIELD_TYPE"
+ WHEN 7 THEN \'SMALLINT\'
+ WHEN 8 THEN \'INTEGER\'
+ WHEN 9 THEN \'QUAD\'
+ WHEN 10 THEN \'FLOAT\'
+ WHEN 11 THEN \'DFLOAT\'
+ WHEN 12 THEN \'DATE\'
+ WHEN 13 THEN \'TIME\'
+ WHEN 14 THEN \'CHAR\'
+ WHEN 16 THEN \'INT64\'
+ WHEN 27 THEN \'DOUBLE\'
+ WHEN 35 THEN \'TIMESTAMP\'
+ WHEN 37 THEN \'VARCHAR\'
+ WHEN 40 THEN \'CSTRING\'
+ WHEN 261 THEN \'BLOB\'
+ ELSE NULL
+ END AS "type",
+ "fields"."RDB$FIELD_LENGTH" AS "max_length",
+ "rfields"."RDB$DEFAULT_VALUE" AS "default"
+ FROM "RDB$RELATION_FIELDS" "rfields"
+ JOIN "RDB$FIELDS" "fields" ON "rfields"."RDB$FIELD_SOURCE" = "fields"."RDB$FIELD_NAME"
+ WHERE "rfields"."RDB$RELATION_NAME" = '.$this->escape($table).'
+ ORDER BY "rfields"."RDB$FIELD_POSITION"';
+
+ return (($query = $this->query($sql)) !== FALSE)
+ ? $query->result_object()
+ : FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ *
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _truncate($table)
+ {
+ return 'DELETE FROM '.$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ // Limit clause depends on if Interbase or Firebird
+ if (stripos($this->version(), 'firebird') !== FALSE)
+ {
+ $select = 'FIRST '.$this->qb_limit
+ .($this->qb_offset > 0 ? ' SKIP '.$this->qb_offset : '');
+ }
+ else
+ {
+ $select = 'ROWS '
+ .($this->qb_offset > 0 ? $this->qb_offset.' TO '.($this->qb_limit + $this->qb_offset) : $this->qb_limit);
+ }
+
+ return preg_replace('`SELECT`i', 'SELECT '.$select, $sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert batch statement
+ *
+ * Generates a platform-specific insert string from the supplied data.
+ *
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
+ * @return string|bool
+ */
+ protected function _insert_batch($table, $keys, $values)
+ {
+ return ($this->db_debug) ? $this->display_error('db_unsupported_feature') : FALSE;
+ }
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php b/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php
new file mode 100644
index 000000000..20c5a6897
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_firebird_forge.php
@@ -0,0 +1,237 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Firebird Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_firebird_forge extends CI_DB_pdo_forge {
+
+ /**
+ * RENAME TABLE statement
+ *
+ * @var string
+ */
+ protected $_rename_table = FALSE;
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'SMALLINT' => 'INTEGER',
+ 'INTEGER' => 'INT64',
+ 'FLOAT' => 'DOUBLE PRECISION'
+ );
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = 'NULL';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Create database
+ *
+ * @param string $db_name
+ * @return string
+ */
+ public function create_database($db_name)
+ {
+ // Firebird databases are flat files, so a path is required
+
+ // Hostname is needed for remote access
+ empty($this->db->hostname) OR $db_name = $this->hostname.':'.$db_name;
+
+ return parent::create_database('"'.$db_name.'"');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop database
+ *
+ * @param string $db_name (ignored)
+ * @return bool
+ */
+ public function drop_database($db_name)
+ {
+ if ( ! ibase_drop_db($this->conn_id))
+ {
+ return ($this->db->db_debug) ? $this->db->display_error('db_unable_to_drop') : FALSE;
+ }
+ elseif ( ! empty($this->db->data_cache['db_names']))
+ {
+ $key = array_search(strtolower($this->db->database), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ unset($this->db->data_cache['db_names'][$key]);
+ }
+ }
+
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('DROP', 'ADD'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ if ($field[$i]['_literal'] !== FALSE)
+ {
+ return FALSE;
+ }
+
+ if (isset($field[$i]['type']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' TYPE '.$field[$i]['type'].$field[$i]['length'];
+ }
+
+ if ( ! empty($field[$i]['default']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' SET DEFAULT '.$field[$i]['default'];
+ }
+
+ if (isset($field[$i]['null']))
+ {
+ $sqls[] = 'UPDATE "RDB$RELATION_FIELDS" SET "RDB$NULL_FLAG" = '
+ .($field[$i]['null'] === TRUE ? 'NULL' : '1')
+ .' WHERE "RDB$FIELD_NAME" = '.$this->db->escape($field[$i]['name'])
+ .' AND "RDB$RELATION_NAME" = '.$this->db->escape($table);
+ }
+
+ if ( ! empty($field[$i]['new_name']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
+ }
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ return $this->db->escape_identifiers($field['name'])
+ .' '.$field['type'].$field['length']
+ .$field['null']
+ .$field['unique']
+ .$field['default'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'INT':
+ $attributes['TYPE'] = 'INTEGER';
+ return;
+ case 'BIGINT':
+ $attributes['TYPE'] = 'INT64';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ // Not supported
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
new file mode 100644
index 000000000..26b556a78
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_ibm_driver.php
@@ -0,0 +1,244 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO IBM DB2 Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_ibm_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'ibm';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'ibm:';
+
+ // Pre-defined DSN
+ if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT))
+ {
+ if (isset($this->DSN))
+ {
+ $this->dsn .= 'DSN='.$this->DSN;
+ }
+ elseif ( ! empty($this->database))
+ {
+ $this->dsn .= 'DSN='.$this->database;
+ }
+
+ return;
+ }
+
+ $this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';';
+
+ if (isset($this->DATABASE))
+ {
+ $this->dsn .= 'DATABASE='.$this->DATABASE.';';
+ }
+ elseif ( ! empty($this->database))
+ {
+ $this->dsn .= 'DATABASE='.$this->database.';';
+ }
+
+ if (isset($this->HOSTNAME))
+ {
+ $this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';';
+ }
+ else
+ {
+ $this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';');
+ }
+
+ if (isset($this->PORT))
+ {
+ $this->dsn .= 'PORT='.$this->port.';';
+ }
+ elseif ( ! empty($this->port))
+ {
+ $this->dsn .= ';PORT='.$this->port.';';
+ }
+
+ $this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;');
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "tabname" FROM "syscat"."tables"
+ WHERE "type" = \'T\' AND LOWER("tabschema") = '.$this->escape(strtolower($this->database));
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ $sql .= ' AND "tabname" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return array
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT "colname" FROM "syscat"."columns"
+ WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).'
+ AND LOWER("tabname") = '.$this->escape(strtolower($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT "colname" AS "name", "typename" AS "type", "default" AS "default", "length" AS "max_length",
+ CASE "keyseq" WHEN NULL THEN 0 ELSE 1 END AS "primary_key"
+ FROM "syscat"."columns"
+ WHERE LOWER("tabschema") = '.$this->escape(strtolower($this->database)).'
+ AND LOWER("tabname") = '.$this->escape(strtolower($table)).'
+ ORDER BY "colno"';
+
+ return (($query = $this->query($sql)) !== FALSE)
+ ? $query->result_object()
+ : FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ $sql .= ' FETCH FIRST '.($this->qb_limit + $this->qb_offset).' ROWS ONLY';
+
+ return ($this->qb_offset)
+ ? 'SELECT * FROM ('.$sql.') WHERE rownum > '.$this->qb_offset
+ : $sql;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php b/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php
new file mode 100644
index 000000000..4238ca082
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_ibm_forge.php
@@ -0,0 +1,154 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO IBM DB2 Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_ibm_forge extends CI_DB_pdo_forge {
+
+ /**
+ * RENAME TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_rename_table = 'RENAME TABLE %s TO %s';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'SMALLINT' => 'INTEGER',
+ 'INT' => 'BIGINT',
+ 'INTEGER' => 'BIGINT'
+ );
+
+ /**
+ * DEFAULT value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_default = FALSE;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if ($alter_type === 'CHANGE')
+ {
+ $alter_type = 'MODIFY';
+ }
+
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute UNIQUE
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_unique(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
+ {
+ $field['unique'] = ' UNIQUE';
+
+ // UNIQUE must be used with NOT NULL
+ $field['null'] = ' NOT NULL';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ // Not supported
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
new file mode 100644
index 000000000..050171f64
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_informix_driver.php
@@ -0,0 +1,309 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Informix Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_informix_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'informix';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('ASC', 'ASC'); // Currently not supported
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'informix:';
+
+ // Pre-defined DSN
+ if (empty($this->hostname) && empty($this->host) && empty($this->port) && empty($this->service))
+ {
+ if (isset($this->DSN))
+ {
+ $this->dsn .= 'DSN='.$this->DSN;
+ }
+ elseif ( ! empty($this->database))
+ {
+ $this->dsn .= 'DSN='.$this->database;
+ }
+
+ return;
+ }
+
+ if (isset($this->host))
+ {
+ $this->dsn .= 'host='.$this->host;
+ }
+ else
+ {
+ $this->dsn .= 'host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+ }
+
+ if (isset($this->service))
+ {
+ $this->dsn .= '; service='.$this->service;
+ }
+ elseif ( ! empty($this->port))
+ {
+ $this->dsn .= '; service='.$this->port;
+ }
+
+ empty($this->database) OR $this->dsn .= '; database='.$this->database;
+ empty($this->server) OR $this->dsn .= '; server='.$this->server;
+
+ $this->dsn .= '; protocol='.(isset($this->protocol) ? $this->protocol : 'onsoctcp')
+ .'; EnableScrollableCursors=1';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "tabname" FROM "systables"
+ WHERE "tabid" > 99 AND "tabtype" = \'T\' AND LOWER("owner") = '.$this->escape(strtolower($this->username));
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ $sql .= ' AND "tabname" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ if (strpos($table, '.') !== FALSE)
+ {
+ sscanf($table, '%[^.].%s', $owner, $table);
+ }
+ else
+ {
+ $owner = $this->username;
+ }
+
+ return 'SELECT "colname" FROM "systables", "syscolumns"
+ WHERE "systables"."tabid" = "syscolumns"."tabid"
+ AND "systables"."tabtype" = \'T\'
+ AND LOWER("systables"."owner") = '.$this->escape(strtolower($owner)).'
+ AND LOWER("systables"."tabname") = '.$this->escape(strtolower($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT "syscolumns"."colname" AS "name",
+ CASE "syscolumns"."coltype"
+ WHEN 0 THEN \'CHAR\'
+ WHEN 1 THEN \'SMALLINT\'
+ WHEN 2 THEN \'INTEGER\'
+ WHEN 3 THEN \'FLOAT\'
+ WHEN 4 THEN \'SMALLFLOAT\'
+ WHEN 5 THEN \'DECIMAL\'
+ WHEN 6 THEN \'SERIAL\'
+ WHEN 7 THEN \'DATE\'
+ WHEN 8 THEN \'MONEY\'
+ WHEN 9 THEN \'NULL\'
+ WHEN 10 THEN \'DATETIME\'
+ WHEN 11 THEN \'BYTE\'
+ WHEN 12 THEN \'TEXT\'
+ WHEN 13 THEN \'VARCHAR\'
+ WHEN 14 THEN \'INTERVAL\'
+ WHEN 15 THEN \'NCHAR\'
+ WHEN 16 THEN \'NVARCHAR\'
+ WHEN 17 THEN \'INT8\'
+ WHEN 18 THEN \'SERIAL8\'
+ WHEN 19 THEN \'SET\'
+ WHEN 20 THEN \'MULTISET\'
+ WHEN 21 THEN \'LIST\'
+ WHEN 22 THEN \'Unnamed ROW\'
+ WHEN 40 THEN \'LVARCHAR\'
+ WHEN 41 THEN \'BLOB/CLOB/BOOLEAN\'
+ WHEN 4118 THEN \'Named ROW\'
+ ELSE "syscolumns"."coltype"
+ END AS "type",
+ "syscolumns"."collength" as "max_length",
+ CASE "sysdefaults"."type"
+ WHEN \'L\' THEN "sysdefaults"."default"
+ ELSE NULL
+ END AS "default"
+ FROM "syscolumns", "systables", "sysdefaults"
+ WHERE "syscolumns"."tabid" = "systables"."tabid"
+ AND "systables"."tabid" = "sysdefaults"."tabid"
+ AND "syscolumns"."colno" = "sysdefaults"."colno"
+ AND "systables"."tabtype" = \'T\'
+ AND LOWER("systables"."owner") = '.$this->escape(strtolower($this->username)).'
+ AND LOWER("systables"."tabname") = '.$this->escape(strtolower($table)).'
+ ORDER BY "syscolumns"."colno"';
+
+ return (($query = $this->query($sql)) !== FALSE)
+ ? $query->result_object()
+ : FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ *
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _truncate($table)
+ {
+ return 'TRUNCATE TABLE ONLY '.$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql $SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ $select = 'SELECT '.($this->qb_offset ? 'SKIP '.$this->qb_offset : '').'FIRST '.$this->qb_limit.' ';
+ return preg_replace('/^(SELECT\s)/i', $select, $sql, 1);
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php b/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php
new file mode 100644
index 000000000..2ddc2a933
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_informix_forge.php
@@ -0,0 +1,163 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Informix Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_informix_forge extends CI_DB_pdo_forge {
+
+ /**
+ * RENAME TABLE statement
+ *
+ * @var string
+ */
+ protected $_rename_table = 'RENAME TABLE %s TO %s';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'SMALLINT' => 'INTEGER',
+ 'INT' => 'BIGINT',
+ 'INTEGER' => 'BIGINT',
+ 'REAL' => 'DOUBLE PRECISION',
+ 'SMALLFLOAT' => 'DOUBLE PRECISION'
+ );
+
+ /**
+ * DEFAULT value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_default = ', ';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if ($alter_type === 'CHANGE')
+ {
+ $alter_type = 'MODIFY';
+ }
+
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'BYTE':
+ case 'TEXT':
+ case 'BLOB':
+ case 'CLOB':
+ $attributes['UNIQUE'] = FALSE;
+ if (isset($attributes['DEFAULT']))
+ {
+ unset($attributes['DEFAULT']);
+ }
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute UNIQUE
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_unique(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['UNIQUE']) && $attributes['UNIQUE'] === TRUE)
+ {
+ $field['unique'] = ' UNIQUE CONSTRAINT '.$this->db->escape_identifiers($field['name']);
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ // Not supported
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
new file mode 100644
index 000000000..64b13d827
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -0,0 +1,374 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO MySQL Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_mysql_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'mysql';
+
+ /**
+ * Compression flag
+ *
+ * @var bool
+ */
+ public $compress = FALSE;
+
+ /**
+ * Strict ON flag
+ *
+ * Whether we're running in strict SQL mode.
+ *
+ * @var bool
+ */
+ public $stricton;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Identifier escape character
+ *
+ * @var string
+ */
+ protected $_escape_char = '`';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'mysql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ empty($this->port) OR $this->dsn .= ';port='.$this->port;
+ empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ }
+ elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 6) === FALSE)
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database connection
+ *
+ * @param bool $persistent
+ * @return object
+ */
+ public function db_connect($persistent = FALSE)
+ {
+ if (isset($this->stricton))
+ {
+ if ($this->stricton)
+ {
+ $sql = 'CONCAT(@@sql_mode, ",", "STRICT_ALL_TABLES")';
+ }
+ else
+ {
+ $sql = 'REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
+ @@sql_mode,
+ "STRICT_ALL_TABLES,", ""),
+ ",STRICT_ALL_TABLES", ""),
+ "STRICT_ALL_TABLES", ""),
+ "STRICT_TRANS_TABLES,", ""),
+ ",STRICT_TRANS_TABLES", ""),
+ "STRICT_TRANS_TABLES", "")';
+ }
+
+ if ( ! empty($sql))
+ {
+ if (empty($this->options[PDO::MYSQL_ATTR_INIT_COMMAND]))
+ {
+ $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET SESSION sql_mode = '.$sql;
+ }
+ else
+ {
+ $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] .= ', @@session.sql_mode = '.$sql;
+ }
+ }
+ }
+
+ if ($this->compress === TRUE)
+ {
+ $this->options[PDO::MYSQL_ATTR_COMPRESS] = TRUE;
+ }
+
+ if (is_array($this->encrypt))
+ {
+ $ssl = array();
+ empty($this->encrypt['ssl_key']) OR $ssl[PDO::MYSQL_ATTR_SSL_KEY] = $this->encrypt['ssl_key'];
+ empty($this->encrypt['ssl_cert']) OR $ssl[PDO::MYSQL_ATTR_SSL_CERT] = $this->encrypt['ssl_cert'];
+ empty($this->encrypt['ssl_ca']) OR $ssl[PDO::MYSQL_ATTR_SSL_CA] = $this->encrypt['ssl_ca'];
+ empty($this->encrypt['ssl_capath']) OR $ssl[PDO::MYSQL_ATTR_SSL_CAPATH] = $this->encrypt['ssl_capath'];
+ empty($this->encrypt['ssl_cipher']) OR $ssl[PDO::MYSQL_ATTR_SSL_CIPHER] = $this->encrypt['ssl_cipher'];
+
+ // DO NOT use array_merge() here!
+ // It re-indexes numeric keys and the PDO_MYSQL_ATTR_SSL_* constants are integers.
+ empty($ssl) OR $this->options += $ssl;
+ }
+
+ // Prior to version 5.7.3, MySQL silently downgrades to an unencrypted connection if SSL setup fails
+ if (
+ ($pdo = parent::db_connect($persistent)) !== FALSE
+ && ! empty($ssl)
+ && version_compare($pdo->getAttribute(PDO::ATTR_CLIENT_VERSION), '5.7.3', '<=')
+ && empty($pdo->query("SHOW STATUS LIKE 'ssl_cipher'")->fetchObject()->Value)
+ )
+ {
+ $message = 'PDO_MYSQL was configured for an SSL connection, but got an unencrypted connection instead!';
+ log_message('error', $message);
+ return ($this->db_debug) ? $this->display_error($message, '', TRUE) : FALSE;
+ }
+
+ return $pdo;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Select the database
+ *
+ * @param string $database
+ * @return bool
+ */
+ public function db_select($database = '')
+ {
+ if ($database === '')
+ {
+ $database = $this->database;
+ }
+
+ if (FALSE !== $this->simple_query('USE '.$this->escape_identifiers($database)))
+ {
+ $this->database = $database;
+ $this->data_cache = array();
+ return TRUE;
+ }
+
+ return FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Begin Transaction
+ *
+ * @return bool
+ */
+ protected function _trans_begin()
+ {
+ $this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, FALSE);
+ return $this->conn_id->beginTransaction();
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Commit Transaction
+ *
+ * @return bool
+ */
+ protected function _trans_commit()
+ {
+ if ($this->conn_id->commit())
+ {
+ $this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
+ return TRUE;
+ }
+
+ return FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Rollback Transaction
+ *
+ * @return bool
+ */
+ protected function _trans_rollback()
+ {
+ if ($this->conn_id->rollBack())
+ {
+ $this->conn_id->setAttribute(PDO::ATTR_AUTOCOMMIT, TRUE);
+ return TRUE;
+ }
+
+ return FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SHOW TABLES';
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->Field;
+
+ sscanf($query[$i]->Type, '%[a-z](%d)',
+ $retval[$i]->type,
+ $retval[$i]->max_length
+ );
+
+ $retval[$i]->default = $query[$i]->Default;
+ $retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ *
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _truncate($table)
+ {
+ return 'TRUNCATE '.$table;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * FROM tables
+ *
+ * Groups tables in FROM clauses if needed, so there is no confusion
+ * about operator precedence.
+ *
+ * @return string
+ */
+ protected function _from_tables()
+ {
+ if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
+ {
+ return '('.implode(', ', $this->qb_from).')';
+ }
+
+ return implode(', ', $this->qb_from);
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php
new file mode 100644
index 000000000..c7a92b826
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_forge.php
@@ -0,0 +1,256 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO MySQL Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_mysql_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE DATABASE statement
+ *
+ * @var string
+ */
+ protected $_create_database = 'CREATE DATABASE %s CHARACTER SET %s COLLATE %s';
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS';
+
+ /**
+ * CREATE TABLE keys flag
+ *
+ * Whether table keys are created from within the
+ * CREATE TABLE statement.
+ *
+ * @var bool
+ */
+ protected $_create_table_keys = TRUE;
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'TINYINT',
+ 'SMALLINT',
+ 'MEDIUMINT',
+ 'INT',
+ 'INTEGER',
+ 'BIGINT',
+ 'REAL',
+ 'DOUBLE',
+ 'DOUBLE PRECISION',
+ 'FLOAT',
+ 'DECIMAL',
+ 'NUMERIC'
+ );
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = 'NULL';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * CREATE TABLE attributes
+ *
+ * @param array $attributes Associative array of table attributes
+ * @return string
+ */
+ protected function _create_table_attr($attributes)
+ {
+ $sql = '';
+
+ foreach (array_keys($attributes) as $key)
+ {
+ if (is_string($key))
+ {
+ $sql .= ' '.strtoupper($key).' = '.$attributes[$key];
+ }
+ }
+
+ if ( ! empty($this->db->char_set) && ! strpos($sql, 'CHARACTER SET') && ! strpos($sql, 'CHARSET'))
+ {
+ $sql .= ' DEFAULT CHARACTER SET = '.$this->db->char_set;
+ }
+
+ if ( ! empty($this->db->dbcollat) && ! strpos($sql, 'COLLATE'))
+ {
+ $sql .= ' COLLATE = '.$this->db->dbcollat;
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if ($alter_type === 'DROP')
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ if ($field[$i]['_literal'] !== FALSE)
+ {
+ $field[$i] = ($alter_type === 'ADD')
+ ? "\n\tADD ".$field[$i]['_literal']
+ : "\n\tMODIFY ".$field[$i]['_literal'];
+ }
+ else
+ {
+ if ($alter_type === 'ADD')
+ {
+ $field[$i]['_literal'] = "\n\tADD ";
+ }
+ else
+ {
+ $field[$i]['_literal'] = empty($field[$i]['new_name']) ? "\n\tMODIFY " : "\n\tCHANGE ";
+ }
+
+ $field[$i] = $field[$i]['_literal'].$this->_process_column($field[$i]);
+ }
+ }
+
+ return array($sql.implode(',', $field));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ $extra_clause = isset($field['after'])
+ ? ' AFTER '.$this->db->escape_identifiers($field['after']) : '';
+
+ if (empty($extra_clause) && isset($field['first']) && $field['first'] === TRUE)
+ {
+ $extra_clause = ' FIRST';
+ }
+
+ return $this->db->escape_identifiers($field['name'])
+ .(empty($field['new_name']) ? '' : ' '.$this->db->escape_identifiers($field['new_name']))
+ .' '.$field['type'].$field['length']
+ .$field['unsigned']
+ .$field['null']
+ .$field['default']
+ .$field['auto_increment']
+ .$field['unique']
+ .(empty($field['comment']) ? '' : ' COMMENT '.$field['comment'])
+ .$extra_clause;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process indexes
+ *
+ * @param string $table (ignored)
+ * @return string
+ */
+ protected function _process_indexes($table)
+ {
+ $sql = '';
+
+ for ($i = 0, $c = count($this->keys); $i < $c; $i++)
+ {
+ if (is_array($this->keys[$i]))
+ {
+ for ($i2 = 0, $c2 = count($this->keys[$i]); $i2 < $c2; $i2++)
+ {
+ if ( ! isset($this->fields[$this->keys[$i][$i2]]))
+ {
+ unset($this->keys[$i][$i2]);
+ continue;
+ }
+ }
+ }
+ elseif ( ! isset($this->fields[$this->keys[$i]]))
+ {
+ unset($this->keys[$i]);
+ continue;
+ }
+
+ is_array($this->keys[$i]) OR $this->keys[$i] = array($this->keys[$i]);
+
+ $sql .= ",\n\tKEY ".$this->db->escape_identifiers(implode('_', $this->keys[$i]))
+ .' ('.implode(', ', $this->db->escape_identifiers($this->keys[$i])).')';
+ }
+
+ $this->keys = array();
+
+ return $sql;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php
new file mode 100644
index 000000000..abf9167d6
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_oci_driver.php
@@ -0,0 +1,326 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Oracle Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_oci_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'oci';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * List of reserved identifiers
+ *
+ * Identifiers that must NOT be escaped.
+ *
+ * @var string[]
+ */
+ protected $_reserved_identifiers = array('*', 'rownum');
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('ASC', 'ASC'); // Currently not supported
+
+ /**
+ * COUNT string
+ *
+ * @used-by CI_DB_driver::count_all()
+ * @used-by CI_DB_query_builder::count_all_results()
+ *
+ * @var string
+ */
+ protected $_count_string = 'SELECT COUNT(1) AS ';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'oci:dbname=';
+
+ // Oracle has a slightly different PDO DSN format (Easy Connect),
+ // which also supports pre-defined DSNs.
+ if (empty($this->hostname) && empty($this->port))
+ {
+ $this->dsn .= $this->database;
+ }
+ else
+ {
+ $this->dsn .= '//'.(empty($this->hostname) ? '127.0.0.1' : $this->hostname)
+ .(empty($this->port) ? '' : ':'.$this->port).'/';
+
+ empty($this->database) OR $this->dsn .= $this->database;
+ }
+
+ empty($this->char_set) OR $this->dsn .= ';charset='.$this->char_set;
+ }
+ elseif ( ! empty($this->char_set) && strpos($this->dsn, 'charset=', 4) === FALSE)
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database version number
+ *
+ * @return string
+ */
+ public function version()
+ {
+ if (isset($this->data_cache['version']))
+ {
+ return $this->data_cache['version'];
+ }
+
+ $version_string = parent::version();
+ if (preg_match('#Release\s(?<version>\d+(?:\.\d+)+)#', $version_string, $match))
+ {
+ return $this->data_cache['version'] = $match[1];
+ }
+
+ return FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "TABLE_NAME" FROM "ALL_TABLES"';
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql.' WHERE "TABLE_NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ if (strpos($table, '.') !== FALSE)
+ {
+ sscanf($table, '%[^.].%s', $owner, $table);
+ }
+ else
+ {
+ $owner = $this->username;
+ }
+
+ return 'SELECT COLUMN_NAME FROM ALL_TAB_COLUMNS
+ WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).'
+ AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ if (strpos($table, '.') !== FALSE)
+ {
+ sscanf($table, '%[^.].%s', $owner, $table);
+ }
+ else
+ {
+ $owner = $this->username;
+ }
+
+ $sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHAR_LENGTH, DATA_PRECISION, DATA_LENGTH, DATA_DEFAULT, NULLABLE
+ FROM ALL_TAB_COLUMNS
+ WHERE UPPER(OWNER) = '.$this->escape(strtoupper($owner)).'
+ AND UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+
+ if (($query = $this->query($sql)) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->COLUMN_NAME;
+ $retval[$i]->type = $query[$i]->DATA_TYPE;
+
+ $length = ($query[$i]->CHAR_LENGTH > 0)
+ ? $query[$i]->CHAR_LENGTH : $query[$i]->DATA_PRECISION;
+ if ($length === NULL)
+ {
+ $length = $query[$i]->DATA_LENGTH;
+ }
+ $retval[$i]->max_length = $length;
+
+ $default = $query[$i]->DATA_DEFAULT;
+ if ($default === NULL && $query[$i]->NULLABLE === 'N')
+ {
+ $default = '';
+ }
+ $retval[$i]->default = $query[$i]->COLUMN_DEFAULT;
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert batch statement
+ *
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
+ * @return string
+ */
+ protected function _insert_batch($table, $keys, $values)
+ {
+ $keys = implode(', ', $keys);
+ $sql = "INSERT ALL\n";
+
+ for ($i = 0, $c = count($values); $i < $c; $i++)
+ {
+ $sql .= ' INTO '.$table.' ('.$keys.') VALUES '.$values[$i]."\n";
+ }
+
+ return $sql.'SELECT * FROM dual';
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ if ($this->qb_limit)
+ {
+ $this->where('rownum <= ',$this->qb_limit, FALSE);
+ $this->qb_limit = FALSE;
+ }
+
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ if (version_compare($this->version(), '12.1', '>='))
+ {
+ // OFFSET-FETCH can be used only with the ORDER BY clause
+ empty($this->qb_orderby) && $sql .= ' ORDER BY 1';
+
+ return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY';
+ }
+
+ return 'SELECT * FROM (SELECT inner_query.*, rownum rnum FROM ('.$sql.') inner_query WHERE rownum < '.($this->qb_offset + $this->qb_limit + 1).')'
+ .($this->qb_offset ? ' WHERE rnum >= '.($this->qb_offset + 1): '');
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php b/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php
new file mode 100644
index 000000000..813207b8e
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_oci_forge.php
@@ -0,0 +1,176 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO Oracle Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_oci_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE DATABASE statement
+ *
+ * @var string
+ */
+ protected $_create_database = FALSE;
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = FALSE;
+
+ /**
+ * DROP DATABASE statement
+ *
+ * @var string
+ */
+ protected $_drop_database = FALSE;
+
+ /**
+ * UNSIGNED support
+ *
+ * @var bool|array
+ */
+ protected $_unsigned = FALSE;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if ($alter_type === 'DROP')
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+ elseif ($alter_type === 'CHANGE')
+ {
+ $alter_type = 'MODIFY';
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ if ($field[$i]['_literal'] !== FALSE)
+ {
+ $field[$i] = "\n\t".$field[$i]['_literal'];
+ }
+ else
+ {
+ $field[$i]['_literal'] = "\n\t".$this->_process_column($field[$i]);
+
+ if ( ! empty($field[$i]['comment']))
+ {
+ $sqls[] = 'COMMENT ON COLUMN '
+ .$this->db->escape_identifiers($table).'.'.$this->db->escape_identifiers($field[$i]['name'])
+ .' IS '.$field[$i]['comment'];
+ }
+
+ if ($alter_type === 'MODIFY' && ! empty($field[$i]['new_name']))
+ {
+ $sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
+ }
+ }
+ }
+
+ $sql .= ' '.$alter_type.' ';
+ $sql .= (count($field) === 1)
+ ? $field[0]
+ : '('.implode(',', $field).')';
+
+ // RENAME COLUMN must be executed after MODIFY
+ array_unshift($sqls, $sql);
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ // Not supported - sequences and triggers must be used instead
+ }
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'NUMBER';
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'NUMBER';
+ return;
+ case 'INT':
+ $attributes['TYPE'] = 'NUMBER';
+ return;
+ case 'BIGINT':
+ $attributes['TYPE'] = 'NUMBER';
+ return;
+ default: return;
+ }
+ }
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
new file mode 100644
index 000000000..066dd9614
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_driver.php
@@ -0,0 +1,229 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO ODBC Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_odbc_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'odbc';
+
+ /**
+ * Database schema
+ *
+ * @var string
+ */
+ public $schema = 'public';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Identifier escape character
+ *
+ * Must be empty for ODBC.
+ *
+ * @var string
+ */
+ protected $_escape_char = '';
+
+ /**
+ * ESCAPE statement string
+ *
+ * @var string
+ */
+ protected $_like_escape_str = " {escape '%s'} ";
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('RND()', 'RND(%d)');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'odbc:';
+
+ // Pre-defined DSN
+ if (empty($this->hostname) && empty($this->HOSTNAME) && empty($this->port) && empty($this->PORT))
+ {
+ if (isset($this->DSN))
+ {
+ $this->dsn .= 'DSN='.$this->DSN;
+ }
+ elseif ( ! empty($this->database))
+ {
+ $this->dsn .= 'DSN='.$this->database;
+ }
+
+ return;
+ }
+
+ // If the DSN is not pre-configured - try to build an IBM DB2 connection string
+ $this->dsn .= 'DRIVER='.(isset($this->DRIVER) ? '{'.$this->DRIVER.'}' : '{IBM DB2 ODBC DRIVER}').';';
+
+ if (isset($this->DATABASE))
+ {
+ $this->dsn .= 'DATABASE='.$this->DATABASE.';';
+ }
+ elseif ( ! empty($this->database))
+ {
+ $this->dsn .= 'DATABASE='.$this->database.';';
+ }
+
+ if (isset($this->HOSTNAME))
+ {
+ $this->dsn .= 'HOSTNAME='.$this->HOSTNAME.';';
+ }
+ else
+ {
+ $this->dsn .= 'HOSTNAME='.(empty($this->hostname) ? '127.0.0.1;' : $this->hostname.';');
+ }
+
+ if (isset($this->PORT))
+ {
+ $this->dsn .= 'PORT='.$this->port.';';
+ }
+ elseif ( ! empty($this->port))
+ {
+ $this->dsn .= ';PORT='.$this->port.';';
+ }
+
+ $this->dsn .= 'PROTOCOL='.(isset($this->PROTOCOL) ? $this->PROTOCOL.';' : 'TCPIP;');
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Platform-dependent string escape
+ *
+ * @param string
+ * @return string
+ */
+ protected function _escape_str($str)
+ {
+ $this->display_error('db_unsupported_feature');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Determines if a query is a "write" type.
+ *
+ * @param string An SQL query string
+ * @return bool
+ */
+ public function is_write_type($sql)
+ {
+ if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#is', $sql))
+ {
+ return FALSE;
+ }
+
+ return parent::is_write_type($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = "SELECT table_name FROM information_schema.tables WHERE table_schema = '".$this->schema."'";
+
+ if ($prefix_limit !== FALSE && $this->dbprefix !== '')
+ {
+ return $sql." AND table_name LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT column_name FROM information_schema.columns WHERE table_name = '.$this->escape($table);
+ }
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php b/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php
new file mode 100644
index 000000000..a2a3bada3
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_odbc_forge.php
@@ -0,0 +1,70 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO ODBC Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/database/
+ */
+class CI_DB_pdo_odbc_forge extends CI_DB_pdo_forge {
+
+ /**
+ * UNSIGNED support
+ *
+ * @var bool|array
+ */
+ protected $_unsigned = FALSE;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ // Not supported (in most databases at least)
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
new file mode 100644
index 000000000..9aed3a2fe
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_driver.php
@@ -0,0 +1,384 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO PostgreSQL Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_pgsql_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'pgsql';
+
+ /**
+ * Database schema
+ *
+ * @var string
+ */
+ public $schema = 'public';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('RANDOM()', 'RANDOM()');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'pgsql:host='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ empty($this->port) OR $this->dsn .= ';port='.$this->port;
+ empty($this->database) OR $this->dsn .= ';dbname='.$this->database;
+
+ if ( ! empty($this->username))
+ {
+ $this->dsn .= ';username='.$this->username;
+ empty($this->password) OR $this->dsn .= ';password='.$this->password;
+ }
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database connection
+ *
+ * @param bool $persistent
+ * @return object
+ */
+ public function db_connect($persistent = FALSE)
+ {
+ $this->conn_id = parent::db_connect($persistent);
+
+ if (is_object($this->conn_id) && ! empty($this->schema))
+ {
+ $this->simple_query('SET search_path TO '.$this->schema.',public');
+ }
+
+ return $this->conn_id;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert ID
+ *
+ * @param string $name
+ * @return int
+ */
+ public function insert_id($name = NULL)
+ {
+ if ($name === NULL && version_compare($this->version(), '8.1', '>='))
+ {
+ $query = $this->query('SELECT LASTVAL() AS ins_id');
+ $query = $query->row();
+ return $query->ins_id;
+ }
+
+ return $this->conn_id->lastInsertId($name);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Determines if a query is a "write" type.
+ *
+ * @param string An SQL query string
+ * @return bool
+ */
+ public function is_write_type($sql)
+ {
+ if (preg_match('#^(INSERT|UPDATE).*RETURNING\s.+(\,\s?.+)*$#is', $sql))
+ {
+ return FALSE;
+ }
+
+ return parent::is_write_type($sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * "Smart" Escape String
+ *
+ * Escapes data based on type
+ *
+ * @param string $str
+ * @return mixed
+ */
+ public function escape($str)
+ {
+ if (is_bool($str))
+ {
+ return ($str) ? 'TRUE' : 'FALSE';
+ }
+
+ return parent::escape($str);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY
+ *
+ * @param string $orderby
+ * @param string $direction ASC, DESC or RANDOM
+ * @param bool $escape
+ * @return object
+ */
+ public function order_by($orderby, $direction = '', $escape = NULL)
+ {
+ $direction = strtoupper(trim($direction));
+ if ($direction === 'RANDOM')
+ {
+ if ( ! is_float($orderby) && ctype_digit((string) $orderby))
+ {
+ $orderby = ($orderby > 1)
+ ? (float) '0.'.$orderby
+ : (float) $orderby;
+ }
+
+ if (is_float($orderby))
+ {
+ $this->simple_query('SET SEED '.$orderby);
+ }
+
+ $orderby = $this->_random_keyword[0];
+ $direction = '';
+ $escape = FALSE;
+ }
+
+ return parent::order_by($orderby, $direction, $escape);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "table_name" FROM "information_schema"."tables" WHERE "table_schema" = \''.$this->schema."'";
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql.' AND "table_name" LIKE \''
+ .$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * List column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT "column_name"
+ FROM "information_schema"."columns"
+ WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT "column_name", "data_type", "character_maximum_length", "numeric_precision", "column_default"
+ FROM "information_schema"."columns"
+ WHERE LOWER("table_name") = '.$this->escape(strtolower($table));
+
+ if (($query = $this->query($sql)) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->column_name;
+ $retval[$i]->type = $query[$i]->data_type;
+ $retval[$i]->max_length = ($query[$i]->character_maximum_length > 0) ? $query[$i]->character_maximum_length : $query[$i]->numeric_precision;
+ $retval[$i]->default = $query[$i]->column_default;
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update_Batch statement
+ *
+ * Generates a platform-specific batch update string from the supplied data
+ *
+ * @param string $table Table name
+ * @param array $values Update data
+ * @param string $index WHERE key
+ * @return string
+ */
+ protected function _update_batch($table, $values, $index)
+ {
+ $ids = array();
+ foreach ($values as $key => $val)
+ {
+ $ids[] = $val[$index]['value'];
+
+ foreach (array_keys($val) as $field)
+ {
+ if ($field !== $index)
+ {
+ $final[$val[$field]['field']][] = 'WHEN '.$val[$index]['value'].' THEN '.$val[$field]['value'];
+ }
+ }
+ }
+
+ $cases = '';
+ foreach ($final as $k => $v)
+ {
+ $cases .= $k.' = (CASE '.$val[$index]['field']."\n"
+ .implode("\n", $v)."\n"
+ .'ELSE '.$k.' END), ';
+ }
+
+ $this->where($val[$index]['field'].' IN('.implode(',', $ids).')', NULL, FALSE);
+
+ return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ $this->qb_limit = FALSE;
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ return $sql.' LIMIT '.$this->qb_limit.($this->qb_offset ? ' OFFSET '.$this->qb_offset : '');
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php b/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php
new file mode 100644
index 000000000..b00af4ad0
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_pgsql_forge.php
@@ -0,0 +1,210 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO PostgreSQL Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_pgsql_forge extends CI_DB_pdo_forge {
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'INT2' => 'INTEGER',
+ 'SMALLINT' => 'INTEGER',
+ 'INT' => 'BIGINT',
+ 'INT4' => 'BIGINT',
+ 'INTEGER' => 'BIGINT',
+ 'INT8' => 'NUMERIC',
+ 'BIGINT' => 'NUMERIC',
+ 'REAL' => 'DOUBLE PRECISION',
+ 'FLOAT' => 'DOUBLE PRECISION'
+ );
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = 'NULL';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * @param object &$db Database object
+ * @return void
+ */
+ public function __construct(&$db)
+ {
+ parent::__construct($db);
+
+ if (version_compare($this->db->version(), '9.0', '>'))
+ {
+ $this->create_table_if = 'CREATE TABLE IF NOT EXISTS';
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('DROP', 'ADD'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table);
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ if ($field[$i]['_literal'] !== FALSE)
+ {
+ return FALSE;
+ }
+
+ if (version_compare($this->db->version(), '8', '>=') && isset($field[$i]['type']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' TYPE '.$field[$i]['type'].$field[$i]['length'];
+ }
+
+ if ( ! empty($field[$i]['default']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' SET DEFAULT '.$field[$i]['default'];
+ }
+
+ if (isset($field[$i]['null']))
+ {
+ $sqls[] = $sql.' ALTER COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .($field[$i]['null'] === TRUE ? ' DROP NOT NULL' : ' SET NOT NULL');
+ }
+
+ if ( ! empty($field[$i]['new_name']))
+ {
+ $sqls[] = $sql.' RENAME COLUMN '.$this->db->escape_identifiers($field[$i]['name'])
+ .' TO '.$this->db->escape_identifiers($field[$i]['new_name']);
+ }
+
+ if ( ! empty($field[$i]['comment']))
+ {
+ $sqls[] = 'COMMENT ON COLUMN '
+ .$this->db->escape_identifiers($table).'.'.$this->db->escape_identifiers($field[$i]['name'])
+ .' IS '.$field[$i]['comment'];
+ }
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ // Reset field lengths for data types that don't support it
+ if (isset($attributes['CONSTRAINT']) && stripos($attributes['TYPE'], 'int') !== FALSE)
+ {
+ $attributes['CONSTRAINT'] = NULL;
+ }
+
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'TINYINT':
+ $attributes['TYPE'] = 'SMALLINT';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE)
+ {
+ $field['type'] = ($field['type'] === 'NUMERIC')
+ ? 'BIGSERIAL'
+ : 'SERIAL';
+ }
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
new file mode 100644
index 000000000..9b70f3ea6
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_driver.php
@@ -0,0 +1,219 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO SQLite Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlite_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'sqlite';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('RANDOM()', 'RANDOM()');
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'sqlite:';
+
+ if (empty($this->database) && empty($this->hostname))
+ {
+ $this->database = ':memory:';
+ }
+
+ $this->database = empty($this->database) ? $this->hostname : $this->database;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT "NAME" FROM "SQLITE_MASTER" WHERE "TYPE" = \'table\'';
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ return $sql.' AND "NAME" LIKE \''.$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Fetch Field Names
+ *
+ * @param string $table Table name
+ * @return array
+ */
+ public function list_fields($table)
+ {
+ // Is there a cached result?
+ if (isset($this->data_cache['field_names'][$table]))
+ {
+ return $this->data_cache['field_names'][$table];
+ }
+
+ if (($result = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $this->data_cache['field_names'][$table] = array();
+ foreach ($result->result_array() as $row)
+ {
+ $this->data_cache['field_names'][$table][] = $row['name'];
+ }
+
+ return $this->data_cache['field_names'][$table];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ if (($query = $this->query('PRAGMA TABLE_INFO('.$this->protect_identifiers($table, TRUE, NULL, FALSE).')')) === FALSE)
+ {
+ return FALSE;
+ }
+
+ $query = $query->result_array();
+ if (empty($query))
+ {
+ return FALSE;
+ }
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]['name'];
+ $retval[$i]->type = $query[$i]['type'];
+ $retval[$i]->max_length = NULL;
+ $retval[$i]->default = $query[$i]['dflt_value'];
+ $retval[$i]->primary_key = isset($query[$i]['pk']) ? (int) $query[$i]['pk'] : 0;
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Replace statement
+ *
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
+ * @return string
+ */
+ protected function _replace($table, $keys, $values)
+ {
+ return 'INSERT OR '.parent::_replace($table, $keys, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Truncate statement
+ *
+ * Generates a platform-specific truncate string from the supplied data
+ *
+ * If the database does not support the TRUNCATE statement,
+ * then this method maps to 'DELETE FROM table'
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _truncate($table)
+ {
+ return 'DELETE FROM '.$table;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php b/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php
new file mode 100644
index 000000000..18c475b17
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlite_forge.php
@@ -0,0 +1,238 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO SQLite Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlite_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = 'CREATE TABLE IF NOT EXISTS';
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = 'DROP TABLE IF EXISTS';
+
+ /**
+ * UNSIGNED support
+ *
+ * @var bool|array
+ */
+ protected $_unsigned = FALSE;
+
+ /**
+ * NULL value representation in CREATE/ALTER TABLE statements
+ *
+ * @var string
+ */
+ protected $_null = 'NULL';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * @param object &$db Database object
+ * @return void
+ */
+ public function __construct(&$db)
+ {
+ parent::__construct($db);
+
+ if (version_compare($this->db->version(), '3.3', '<'))
+ {
+ $this->_create_table_if = FALSE;
+ $this->_drop_table_if = FALSE;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Create database
+ *
+ * @param string $db_name (ignored)
+ * @return bool
+ */
+ public function create_database($db_name)
+ {
+ // In SQLite, a database is created when you connect to the database.
+ // We'll return TRUE so that an error isn't generated
+ return TRUE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Drop database
+ *
+ * @param string $db_name (ignored)
+ * @return bool
+ */
+ public function drop_database($db_name)
+ {
+ // In SQLite, a database is dropped when we delete a file
+ if (file_exists($this->db->database))
+ {
+ // We need to close the pseudo-connection first
+ $this->db->close();
+ if ( ! @unlink($this->db->database))
+ {
+ return $this->db->db_debug ? $this->db->display_error('db_unable_to_drop') : FALSE;
+ }
+ elseif ( ! empty($this->db->data_cache['db_names']))
+ {
+ $key = array_search(strtolower($this->db->database), array_map('strtolower', $this->db->data_cache['db_names']), TRUE);
+ if ($key !== FALSE)
+ {
+ unset($this->db->data_cache['db_names'][$key]);
+ }
+ }
+
+ return TRUE;
+ }
+
+ return $this->db->db_debug ? $this->db->display_error('db_unable_to_drop') : FALSE;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if ($alter_type === 'DROP' OR $alter_type === 'CHANGE')
+ {
+ // drop_column():
+ // BEGIN TRANSACTION;
+ // CREATE TEMPORARY TABLE t1_backup(a,b);
+ // INSERT INTO t1_backup SELECT a,b FROM t1;
+ // DROP TABLE t1;
+ // CREATE TABLE t1(a,b);
+ // INSERT INTO t1 SELECT a,b FROM t1_backup;
+ // DROP TABLE t1_backup;
+ // COMMIT;
+
+ return FALSE;
+ }
+
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Process column
+ *
+ * @param array $field
+ * @return string
+ */
+ protected function _process_column($field)
+ {
+ return $this->db->escape_identifiers($field['name'])
+ .' '.$field['type']
+ .$field['auto_increment']
+ .$field['null']
+ .$field['unique']
+ .$field['default'];
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'ENUM':
+ case 'SET':
+ $attributes['TYPE'] = 'TEXT';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
+ {
+ $field['type'] = 'INTEGER PRIMARY KEY';
+ $field['default'] = '';
+ $field['null'] = '';
+ $field['unique'] = '';
+ $field['auto_increment'] = ' AUTOINCREMENT';
+
+ $this->primary_keys = array();
+ }
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
new file mode 100644
index 000000000..07c429eec
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_driver.php
@@ -0,0 +1,369 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO SQLSRV Database Adapter Class
+ *
+ * Note: _DB is an extender class that the app controller
+ * creates dynamically based on whether the query builder
+ * class is being used or not.
+ *
+ * @package CodeIgniter
+ * @subpackage Drivers
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlsrv_driver extends CI_DB_pdo_driver {
+
+ /**
+ * Sub-driver
+ *
+ * @var string
+ */
+ public $subdriver = 'sqlsrv';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ORDER BY random keyword
+ *
+ * @var array
+ */
+ protected $_random_keyword = array('NEWID()', 'RAND(%d)');
+
+ /**
+ * Quoted identifier flag
+ *
+ * Whether to use SQL-92 standard quoted identifier
+ * (double quotes) or brackets for identifier escaping.
+ *
+ * @var bool
+ */
+ protected $_quoted_identifier;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * Builds the DSN if not already set.
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
+ {
+ parent::__construct($params);
+
+ if (empty($this->dsn))
+ {
+ $this->dsn = 'sqlsrv:Server='.(empty($this->hostname) ? '127.0.0.1' : $this->hostname);
+
+ empty($this->port) OR $this->dsn .= ','.$this->port;
+ empty($this->database) OR $this->dsn .= ';Database='.$this->database;
+
+ // Some custom options
+
+ if (isset($this->QuotedId))
+ {
+ $this->dsn .= ';QuotedId='.$this->QuotedId;
+ $this->_quoted_identifier = (bool) $this->QuotedId;
+ }
+
+ if (isset($this->ConnectionPooling))
+ {
+ $this->dsn .= ';ConnectionPooling='.$this->ConnectionPooling;
+ }
+
+ if ($this->encrypt === TRUE)
+ {
+ $this->dsn .= ';Encrypt=1';
+ }
+
+ if (isset($this->TraceOn))
+ {
+ $this->dsn .= ';TraceOn='.$this->TraceOn;
+ }
+
+ if (isset($this->TrustServerCertificate))
+ {
+ $this->dsn .= ';TrustServerCertificate='.$this->TrustServerCertificate;
+ }
+
+ empty($this->APP) OR $this->dsn .= ';APP='.$this->APP;
+ empty($this->Failover_Partner) OR $this->dsn .= ';Failover_Partner='.$this->Failover_Partner;
+ empty($this->LoginTimeout) OR $this->dsn .= ';LoginTimeout='.$this->LoginTimeout;
+ empty($this->MultipleActiveResultSets) OR $this->dsn .= ';MultipleActiveResultSets='.$this->MultipleActiveResultSets;
+ empty($this->TraceFile) OR $this->dsn .= ';TraceFile='.$this->TraceFile;
+ empty($this->WSID) OR $this->dsn .= ';WSID='.$this->WSID;
+ }
+ elseif (preg_match('/QuotedId=(0|1)/', $this->dsn, $match))
+ {
+ $this->_quoted_identifier = (bool) $match[1];
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database connection
+ *
+ * @param bool $persistent
+ * @return object
+ */
+ public function db_connect($persistent = FALSE)
+ {
+ if ( ! empty($this->char_set) && preg_match('/utf[^8]*8/i', $this->char_set))
+ {
+ $this->options[PDO::SQLSRV_ENCODING_UTF8] = 1;
+ }
+
+ $this->conn_id = parent::db_connect($persistent);
+
+ if ( ! is_object($this->conn_id) OR is_bool($this->_quoted_identifier))
+ {
+ return $this->conn_id;
+ }
+
+ // Determine how identifiers are escaped
+ $query = $this->query('SELECT CASE WHEN (@@OPTIONS | 256) = @@OPTIONS THEN 1 ELSE 0 END AS qi');
+ $query = $query->row_array();
+ $this->_quoted_identifier = empty($query) ? FALSE : (bool) $query['qi'];
+ $this->_escape_char = ($this->_quoted_identifier) ? '"' : array('[', ']');
+
+ return $this->conn_id;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show table query
+ *
+ * Generates a platform-specific query string so that the table names can be fetched
+ *
+ * @param bool $prefix_limit
+ * @return string
+ */
+ protected function _list_tables($prefix_limit = FALSE)
+ {
+ $sql = 'SELECT '.$this->escape_identifiers('name')
+ .' FROM '.$this->escape_identifiers('sysobjects')
+ .' WHERE '.$this->escape_identifiers('type')." = 'U'";
+
+ if ($prefix_limit === TRUE && $this->dbprefix !== '')
+ {
+ $sql .= ' AND '.$this->escape_identifiers('name')." LIKE '".$this->escape_like_str($this->dbprefix)."%' "
+ .sprintf($this->_like_escape_str, $this->_like_escape_chr);
+ }
+
+ return $sql.' ORDER BY '.$this->escape_identifiers('name');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Show column query
+ *
+ * Generates a platform-specific query string so that the column names can be fetched
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _list_columns($table = '')
+ {
+ return 'SELECT COLUMN_NAME
+ FROM INFORMATION_SCHEMA.Columns
+ WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Returns an object with field data
+ *
+ * @param string $table
+ * @return array
+ */
+ public function field_data($table)
+ {
+ $sql = 'SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_MAXIMUM_LENGTH, NUMERIC_PRECISION, COLUMN_DEFAULT
+ FROM INFORMATION_SCHEMA.Columns
+ WHERE UPPER(TABLE_NAME) = '.$this->escape(strtoupper($table));
+
+ if (($query = $this->query($sql)) === FALSE)
+ {
+ return FALSE;
+ }
+ $query = $query->result_object();
+
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
+ {
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->COLUMN_NAME;
+ $retval[$i]->type = $query[$i]->DATA_TYPE;
+ $retval[$i]->max_length = ($query[$i]->CHARACTER_MAXIMUM_LENGTH > 0) ? $query[$i]->CHARACTER_MAXIMUM_LENGTH : $query[$i]->NUMERIC_PRECISION;
+ $retval[$i]->default = $query[$i]->COLUMN_DEFAULT;
+ }
+
+ return $retval;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Update statement
+ *
+ * Generates a platform-specific update string from the supplied data
+ *
+ * @param string $table
+ * @param array $values
+ * @return string
+ */
+ protected function _update($table, $values)
+ {
+ $this->qb_limit = FALSE;
+ $this->qb_orderby = array();
+ return parent::_update($table, $values);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Delete statement
+ *
+ * Generates a platform-specific delete string from the supplied data
+ *
+ * @param string $table
+ * @return string
+ */
+ protected function _delete($table)
+ {
+ if ($this->qb_limit)
+ {
+ return 'WITH ci_delete AS (SELECT TOP '.$this->qb_limit.' * FROM '.$table.$this->_compile_wh('qb_where').') DELETE FROM ci_delete';
+ }
+
+ return parent::_delete($table);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * LIMIT
+ *
+ * Generates a platform-specific LIMIT clause
+ *
+ * @param string $sql SQL Query
+ * @return string
+ */
+ protected function _limit($sql)
+ {
+ // As of SQL Server 2012 (11.0.*) OFFSET is supported
+ if (version_compare($this->version(), '11', '>='))
+ {
+ // SQL Server OFFSET-FETCH can be used only with the ORDER BY clause
+ empty($this->qb_orderby) && $sql .= ' ORDER BY 1';
+
+ return $sql.' OFFSET '.(int) $this->qb_offset.' ROWS FETCH NEXT '.$this->qb_limit.' ROWS ONLY';
+ }
+
+ $limit = $this->qb_offset + $this->qb_limit;
+
+ // An ORDER BY clause is required for ROW_NUMBER() to work
+ if ($this->qb_offset && ! empty($this->qb_orderby))
+ {
+ $orderby = $this->_compile_order_by();
+
+ // We have to strip the ORDER BY clause
+ $sql = trim(substr($sql, 0, strrpos($sql, $orderby)));
+
+ // Get the fields to select from our subquery, so that we can avoid CI_rownum appearing in the actual results
+ if (count($this->qb_select) === 0)
+ {
+ $select = '*'; // Inevitable
+ }
+ else
+ {
+ // Use only field names and their aliases, everything else is out of our scope.
+ $select = array();
+ $field_regexp = ($this->_quoted_identifier)
+ ? '("[^\"]+")' : '(\[[^\]]+\])';
+ for ($i = 0, $c = count($this->qb_select); $i < $c; $i++)
+ {
+ $select[] = preg_match('/(?:\s|\.)'.$field_regexp.'$/i', $this->qb_select[$i], $m)
+ ? $m[1] : $this->qb_select[$i];
+ }
+ $select = implode(', ', $select);
+ }
+
+ return 'SELECT '.$select." FROM (\n\n"
+ .preg_replace('/^(SELECT( DISTINCT)?)/i', '\\1 ROW_NUMBER() OVER('.trim($orderby).') AS '.$this->escape_identifiers('CI_rownum').', ', $sql)
+ ."\n\n) ".$this->escape_identifiers('CI_subquery')
+ ."\nWHERE ".$this->escape_identifiers('CI_rownum').' BETWEEN '.($this->qb_offset + 1).' AND '.$limit;
+ }
+
+ return preg_replace('/(^\SELECT (DISTINCT)?)/i','\\1 TOP '.$limit.' ', $sql);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Insert batch statement
+ *
+ * Generates a platform-specific insert string from the supplied data.
+ *
+ * @param string $table Table name
+ * @param array $keys INSERT keys
+ * @param array $values INSERT values
+ * @return string|bool
+ */
+ protected function _insert_batch($table, $keys, $values)
+ {
+ // Multiple-value inserts are only supported as of SQL Server 2008
+ if (version_compare($this->version(), '10', '>='))
+ {
+ return parent::_insert_batch($table, $keys, $values);
+ }
+
+ return ($this->db_debug) ? $this->display_error('db_unsupported_feature') : FALSE;
+ }
+
+}
diff --git a/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php
new file mode 100644
index 000000000..82a0d515d
--- /dev/null
+++ b/system/database/drivers/pdo/subdrivers/pdo_sqlsrv_forge.php
@@ -0,0 +1,149 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP
+ *
+ * This content is released under the MIT License (MIT)
+ *
+ * Copyright (c) 2014 - 2017, British Columbia Institute of Technology
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc. (https://ellislab.com/)
+ * @copyright Copyright (c) 2014 - 2017, British Columbia Institute of Technology (http://bcit.ca/)
+ * @license http://opensource.org/licenses/MIT MIT License
+ * @link https://codeigniter.com
+ * @since Version 3.0.0
+ * @filesource
+ */
+defined('BASEPATH') OR exit('No direct script access allowed');
+
+/**
+ * PDO SQLSRV Forge Class
+ *
+ * @category Database
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
+ */
+class CI_DB_pdo_sqlsrv_forge extends CI_DB_pdo_forge {
+
+ /**
+ * CREATE TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_create_table_if = "IF NOT EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nCREATE TABLE";
+
+ /**
+ * DROP TABLE IF statement
+ *
+ * @var string
+ */
+ protected $_drop_table_if = "IF EXISTS (SELECT * FROM sysobjects WHERE ID = object_id(N'%s') AND OBJECTPROPERTY(id, N'IsUserTable') = 1)\nDROP TABLE";
+
+ /**
+ * UNSIGNED support
+ *
+ * @var array
+ */
+ protected $_unsigned = array(
+ 'TINYINT' => 'SMALLINT',
+ 'SMALLINT' => 'INT',
+ 'INT' => 'BIGINT',
+ 'REAL' => 'FLOAT'
+ );
+
+ // --------------------------------------------------------------------
+
+ /**
+ * ALTER TABLE
+ *
+ * @param string $alter_type ALTER type
+ * @param string $table Table name
+ * @param mixed $field Column definition
+ * @return string|string[]
+ */
+ protected function _alter_table($alter_type, $table, $field)
+ {
+ if (in_array($alter_type, array('ADD', 'DROP'), TRUE))
+ {
+ return parent::_alter_table($alter_type, $table, $field);
+ }
+
+ $sql = 'ALTER TABLE '.$this->db->escape_identifiers($table).' ALTER COLUMN ';
+ $sqls = array();
+ for ($i = 0, $c = count($field); $i < $c; $i++)
+ {
+ $sqls[] = $sql.$this->_process_column($field[$i]);
+ }
+
+ return $sqls;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute TYPE
+ *
+ * Performs a data type mapping between different databases.
+ *
+ * @param array &$attributes
+ * @return void
+ */
+ protected function _attr_type(&$attributes)
+ {
+ if (isset($attributes['CONSTRAINT']) && strpos($attributes['TYPE'], 'INT') !== FALSE)
+ {
+ unset($attributes['CONSTRAINT']);
+ }
+
+ switch (strtoupper($attributes['TYPE']))
+ {
+ case 'MEDIUMINT':
+ $attributes['TYPE'] = 'INTEGER';
+ $attributes['UNSIGNED'] = FALSE;
+ return;
+ case 'INTEGER':
+ $attributes['TYPE'] = 'INT';
+ return;
+ default: return;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Field attribute AUTO_INCREMENT
+ *
+ * @param array &$attributes
+ * @param array &$field
+ * @return void
+ */
+ protected function _attr_auto_increment(&$attributes, &$field)
+ {
+ if ( ! empty($attributes['AUTO_INCREMENT']) && $attributes['AUTO_INCREMENT'] === TRUE && stripos($field['type'], 'int') !== FALSE)
+ {
+ $field['auto_increment'] = ' IDENTITY(1,1)';
+ }
+ }
+
+}