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-rw-r--r--system/database/drivers/mysqli/mysqli_driver.php798
1 files changed, 283 insertions, 515 deletions
diff --git a/system/database/drivers/mysqli/mysqli_driver.php b/system/database/drivers/mysqli/mysqli_driver.php
index a0896d8aa..b59e89494 100644
--- a/system/database/drivers/mysqli/mysqli_driver.php
+++ b/system/database/drivers/mysqli/mysqli_driver.php
@@ -1,413 +1,327 @@
-<?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
- * @author ExpressionEngine Dev Team
- * @copyright Copyright (c) 2008 - 2014, EllisLab, Inc.
- * @license http://codeigniter.com/user_guide/license.html
- * @link http://codeigniter.com
- * @since Version 1.0
+ * 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 1.3.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
- * MySQLi Database Adapter Class - MySQLi only works with PHP 5
+ * MySQLi 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 ExpressionEngine Dev Team
- * @link http://codeigniter.com/user_guide/database/
+ * @author EllisLab Dev Team
+ * @link https://codeigniter.com/user_guide/database/
*/
class CI_DB_mysqli_driver extends CI_DB {
- var $dbdriver = 'mysqli';
-
- // The character used for escaping
- var $_escape_char = '`';
-
- // clause and character used for LIKE escape sequences - not used in MySQL
- var $_like_escape_str = '';
- var $_like_escape_chr = '';
+ /**
+ * Database driver
+ *
+ * @var string
+ */
+ public $dbdriver = 'mysqli';
/**
- * 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.
+ * Compression flag
+ *
+ * @var bool
*/
- var $_count_string = "SELECT COUNT(*) AS ";
- var $_random_keyword = ' RAND()'; // database specific random keyword
+ public $compress = FALSE;
/**
+ * DELETE hack flag
+ *
* Whether to use the MySQL "delete hack" which allows the number
* of affected rows to be shown. Uses a preg_replace when enabled,
* adding a bit more processing to all queries.
- */
- var $delete_hack = TRUE;
-
- // whether SET NAMES must be used to set the character set
- var $use_set_names;
-
- // --------------------------------------------------------------------
-
- /**
- * Non-persistent database connection
*
- * @access private called by the base class
- * @return resource
+ * @var bool
*/
- function db_connect()
- {
- if ($this->port != '')
- {
- return @mysqli_connect($this->hostname, $this->username, $this->password, $this->database, $this->port);
- }
- else
- {
- return @mysqli_connect($this->hostname, $this->username, $this->password, $this->database);
- }
-
- }
-
- // --------------------------------------------------------------------
+ public $delete_hack = TRUE;
/**
- * Persistent database connection
+ * Strict ON flag
+ *
+ * Whether we're running in strict SQL mode.
*
- * @access private called by the base class
- * @return resource
+ * @var bool
*/
- function db_pconnect()
- {
- return $this->db_connect();
- }
+ public $stricton;
// --------------------------------------------------------------------
/**
- * Reconnect
- *
- * Keep / reestablish the db connection if no queries have been
- * sent for a length of time exceeding the server's idle timeout
+ * Identifier escape character
*
- * @access public
- * @return void
+ * @var string
*/
- function reconnect()
- {
- if (mysqli_ping($this->conn_id) === FALSE)
- {
- $this->conn_id = FALSE;
- }
- }
+ protected $_escape_char = '`';
// --------------------------------------------------------------------
/**
- * Select the database
+ * MySQLi object
*
- * @access private called by the base class
- * @return resource
+ * Has to be preserved without being assigned to $conn_id.
+ *
+ * @var MySQLi
*/
- function db_select()
- {
- return @mysqli_select_db($this->conn_id, $this->database);
- }
+ protected $_mysqli;
// --------------------------------------------------------------------
/**
- * Set client character set
+ * Database connection
*
- * @access private
- * @param string
- * @param string
- * @return resource
+ * @param bool $persistent
+ * @return object
*/
- function _db_set_charset($charset, $collation)
+ public function db_connect($persistent = FALSE)
{
- if ( ! isset($this->use_set_names))
+ // Do we have a socket path?
+ if ($this->hostname[0] === '/')
{
- // mysqli_set_charset() requires MySQL >= 5.0.7, use SET NAMES as fallback
- $this->use_set_names = (version_compare(mysqli_get_server_info($this->conn_id), '5.0.7', '>=')) ? FALSE : TRUE;
- }
-
- if ($this->use_set_names === TRUE)
- {
- return @mysqli_query($this->conn_id, "SET NAMES '".$this->escape_str($charset)."' COLLATE '".$this->escape_str($collation)."'");
+ $hostname = NULL;
+ $port = NULL;
+ $socket = $this->hostname;
}
else
{
- return @mysqli_set_charset($this->conn_id, $charset);
+ $hostname = ($persistent === TRUE)
+ ? 'p:'.$this->hostname : $this->hostname;
+ $port = empty($this->port) ? NULL : $this->port;
+ $socket = NULL;
}
- }
- // --------------------------------------------------------------------
+ $client_flags = ($this->compress === TRUE) ? MYSQLI_CLIENT_COMPRESS : 0;
+ $this->_mysqli = mysqli_init();
- /**
- * Version number query string
- *
- * @access public
- * @return string
- */
- function _version()
- {
- return "SELECT version() AS ver";
- }
+ $this->_mysqli->options(MYSQLI_OPT_CONNECT_TIMEOUT, 10);
- // --------------------------------------------------------------------
+ if (isset($this->stricton))
+ {
+ if ($this->stricton)
+ {
+ $this->_mysqli->options(MYSQLI_INIT_COMMAND, 'SET SESSION sql_mode = CONCAT(@@sql_mode, ",", "STRICT_ALL_TABLES")');
+ }
+ else
+ {
+ $this->_mysqli->options(MYSQLI_INIT_COMMAND,
+ 'SET SESSION sql_mode =
+ REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(
+ @@sql_mode,
+ "STRICT_ALL_TABLES,", ""),
+ ",STRICT_ALL_TABLES", ""),
+ "STRICT_ALL_TABLES", ""),
+ "STRICT_TRANS_TABLES,", ""),
+ ",STRICT_TRANS_TABLES", ""),
+ "STRICT_TRANS_TABLES", "")'
+ );
+ }
+ }
- /**
- * Execute the query
- *
- * @access private called by the base class
- * @param string an SQL query
- * @return resource
- */
- function _execute($sql)
- {
- $sql = $this->_prep_query($sql);
- $result = @mysqli_query($this->conn_id, $sql);
- return $result;
- }
+ if (is_array($this->encrypt))
+ {
+ $ssl = array();
+ empty($this->encrypt['ssl_key']) OR $ssl['key'] = $this->encrypt['ssl_key'];
+ empty($this->encrypt['ssl_cert']) OR $ssl['cert'] = $this->encrypt['ssl_cert'];
+ empty($this->encrypt['ssl_ca']) OR $ssl['ca'] = $this->encrypt['ssl_ca'];
+ empty($this->encrypt['ssl_capath']) OR $ssl['capath'] = $this->encrypt['ssl_capath'];
+ empty($this->encrypt['ssl_cipher']) OR $ssl['cipher'] = $this->encrypt['ssl_cipher'];
+
+ if ( ! empty($ssl))
+ {
+ if (isset($this->encrypt['ssl_verify']))
+ {
+ if ($this->encrypt['ssl_verify'])
+ {
+ defined('MYSQLI_OPT_SSL_VERIFY_SERVER_CERT') && $this->_mysqli->options(MYSQLI_OPT_SSL_VERIFY_SERVER_CERT, TRUE);
+ }
+ // Apparently (when it exists), setting MYSQLI_OPT_SSL_VERIFY_SERVER_CERT
+ // to FALSE didn't do anything, so PHP 5.6.16 introduced yet another
+ // constant ...
+ //
+ // https://secure.php.net/ChangeLog-5.php#5.6.16
+ // https://bugs.php.net/bug.php?id=68344
+ elseif (defined('MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT'))
+ {
+ $client_flags |= MYSQLI_CLIENT_SSL_DONT_VERIFY_SERVER_CERT;
+ }
+ }
- // --------------------------------------------------------------------
+ $client_flags |= MYSQLI_CLIENT_SSL;
+ $this->_mysqli->ssl_set(
+ isset($ssl['key']) ? $ssl['key'] : NULL,
+ isset($ssl['cert']) ? $ssl['cert'] : NULL,
+ isset($ssl['ca']) ? $ssl['ca'] : NULL,
+ isset($ssl['capath']) ? $ssl['capath'] : NULL,
+ isset($ssl['cipher']) ? $ssl['cipher'] : NULL
+ );
+ }
+ }
- /**
- * Prep the query
- *
- * If needed, each database adapter can prep the query string
- *
- * @access private called by execute()
- * @param string an SQL query
- * @return string
- */
- function _prep_query($sql)
- {
- // "DELETE FROM TABLE" returns 0 affected rows This hack modifies
- // the query so that it returns the number of affected rows
- if ($this->delete_hack === TRUE)
+ if ($this->_mysqli->real_connect($hostname, $this->username, $this->password, $this->database, $port, $socket, $client_flags))
{
- if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql))
+ // Prior to version 5.7.3, MySQL silently downgrades to an unencrypted connection if SSL setup fails
+ if (
+ ($client_flags & MYSQLI_CLIENT_SSL)
+ && version_compare($this->_mysqli->client_info, '5.7.3', '<=')
+ && empty($this->_mysqli->query("SHOW STATUS LIKE 'ssl_cipher'")->fetch_object()->Value)
+ )
{
- $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql);
+ $this->_mysqli->close();
+ $message = 'MySQLi 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 $this->_mysqli;
}
- return $sql;
+ return FALSE;
}
// --------------------------------------------------------------------
/**
- * Begin Transaction
+ * Reconnect
*
- * @access public
- * @return bool
+ * Keep / reestablish the db connection if no queries have been
+ * sent for a length of time exceeding the server's idle timeout
+ *
+ * @return void
*/
- function trans_begin($test_mode = FALSE)
+ public function reconnect()
{
- if ( ! $this->trans_enabled)
+ if ($this->conn_id !== FALSE && $this->conn_id->ping() === FALSE)
{
- return TRUE;
- }
-
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
- {
- return TRUE;
+ $this->conn_id = FALSE;
}
-
- // 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.
- $this->_trans_failure = ($test_mode === TRUE) ? TRUE : FALSE;
-
- $this->simple_query('SET AUTOCOMMIT=0');
- $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK
- return TRUE;
}
// --------------------------------------------------------------------
/**
- * Commit Transaction
+ * Select the database
*
- * @access public
+ * @param string $database
* @return bool
*/
- function trans_commit()
+ public function db_select($database = '')
{
- if ( ! $this->trans_enabled)
+ if ($database === '')
{
- return TRUE;
+ $database = $this->database;
}
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ($this->conn_id->select_db($database))
{
+ $this->database = $database;
+ $this->data_cache = array();
return TRUE;
}
- $this->simple_query('COMMIT');
- $this->simple_query('SET AUTOCOMMIT=1');
- return TRUE;
+ return FALSE;
}
// --------------------------------------------------------------------
/**
- * Rollback Transaction
+ * Set client character set
*
- * @access public
+ * @param string $charset
* @return bool
*/
- function trans_rollback()
+ protected function _db_set_charset($charset)
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
- {
- return TRUE;
- }
-
- $this->simple_query('ROLLBACK');
- $this->simple_query('SET AUTOCOMMIT=1');
- return TRUE;
+ return $this->conn_id->set_charset($charset);
}
// --------------------------------------------------------------------
/**
- * Escape String
+ * Database version number
*
- * @access public
- * @param string
- * @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ public function version()
{
- if (is_array($str))
+ if (isset($this->data_cache['version']))
{
- foreach ($str as $key => $val)
- {
- $str[$key] = $this->escape_str($val, $like);
- }
-
- return $str;
+ return $this->data_cache['version'];
}
- if (function_exists('mysqli_real_escape_string') AND is_object($this->conn_id))
- {
- $str = mysqli_real_escape_string($this->conn_id, $str);
- }
- elseif (function_exists('mysql_escape_string'))
- {
- $str = mysql_escape_string($str);
- }
- else
- {
- $str = addslashes($str);
- }
-
- // escape LIKE condition wildcards
- if ($like === TRUE)
- {
- $str = str_replace(array('%', '_'), array('\\%', '\\_'), $str);
- }
-
- return $str;
+ return $this->data_cache['version'] = $this->conn_id->server_info;
}
// --------------------------------------------------------------------
/**
- * Affected Rows
- *
- * @access public
- * @return integer
- */
- function affected_rows()
- {
- return @mysqli_affected_rows($this->conn_id);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert ID
+ * Execute the query
*
- * @access public
- * @return integer
+ * @param string $sql an SQL query
+ * @return mixed
*/
- function insert_id()
+ protected function _execute($sql)
{
- return @mysqli_insert_id($this->conn_id);
+ return $this->conn_id->query($this->_prep_query($sql));
}
// --------------------------------------------------------------------
/**
- * "Count All" query
- *
- * Generates a platform-specific query string that counts all records in
- * the specified database
- *
- * @access public
- * @param string
- * @return string
- */
- function count_all($table = '')
- {
- if ($table == '')
- {
- return 0;
- }
-
- $query = $this->query($this->_count_string . $this->_protect_identifiers('numrows') . " FROM " . $this->_protect_identifiers($table, TRUE, NULL, FALSE));
-
- if ($query->num_rows() == 0)
- {
- return 0;
- }
-
- $row = $query->row();
- $this->_reset_select();
- return (int) $row->numrows;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * List table query
+ * Prep the query
*
- * Generates a platform-specific query string so that the table names can be fetched
+ * If needed, each database adapter can prep the query string
*
- * @access private
- * @param boolean
+ * @param string $sql an SQL query
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ protected function _prep_query($sql)
{
- $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char;
-
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ // mysqli_affected_rows() returns 0 for "DELETE FROM TABLE" queries. This hack
+ // modifies the query so that it a proper number of affected rows is returned.
+ if ($this->delete_hack === TRUE && preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql))
{
- $sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ return trim($sql).' WHERE 1=1';
}
return $sql;
@@ -416,342 +330,203 @@ class CI_DB_mysqli_driver extends CI_DB {
// --------------------------------------------------------------------
/**
- * Show column query
- *
- * Generates a platform-specific query string so that the column names can be fetched
+ * Begin Transaction
*
- * @access public
- * @param string the table name
- * @return string
+ * @return bool
*/
- function _list_columns($table = '')
+ protected function _trans_begin()
{
- return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE);
+ $this->conn_id->autocommit(FALSE);
+ return is_php('5.5')
+ ? $this->conn_id->begin_transaction()
+ : $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK
}
// --------------------------------------------------------------------
/**
- * Field data query
- *
- * Generates a platform-specific query so that the column data can be retrieved
+ * Commit Transaction
*
- * @access public
- * @param string the table name
- * @return object
+ * @return bool
*/
- function _field_data($table)
+ protected function _trans_commit()
{
- return "DESCRIBE ".$table;
- }
-
- // --------------------------------------------------------------------
+ if ($this->conn_id->commit())
+ {
+ $this->conn_id->autocommit(TRUE);
+ return TRUE;
+ }
- /**
- * The error message string
- *
- * @access private
- * @return string
- */
- function _error_message()
- {
- return mysqli_error($this->conn_id);
+ return FALSE;
}
// --------------------------------------------------------------------
/**
- * The error message number
+ * Rollback Transaction
*
- * @access private
- * @return integer
+ * @return bool
*/
- function _error_number()
+ protected function _trans_rollback()
{
- return mysqli_errno($this->conn_id);
+ if ($this->conn_id->rollback())
+ {
+ $this->conn_id->autocommit(TRUE);
+ return TRUE;
+ }
+
+ return FALSE;
}
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
+ * Platform-dependent string escape
*
- * @access private
* @param string
* @return string
*/
- function _escape_identifiers($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.$this->_escape_char;
- }
-
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return $this->conn_id->real_escape_string($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 '('.implode(', ', $tables).')';
+ return $this->conn_id->affected_rows;
}
// --------------------------------------------------------------------
/**
- * Insert statement
- *
- * Generates a platform-specific insert string from the supplied data
+ * Insert ID
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
+ * @return int
*/
- function _insert($table, $keys, $values)
+ public function insert_id()
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return $this->conn_id->insert_id;
}
// --------------------------------------------------------------------
/**
- * Insert_batch statement
+ * List table query
*
- * Generates a platform-specific insert string from the supplied data
+ * Generates a platform-specific query string so that the table names can be fetched
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
+ * @param bool $prefix_limit
* @return string
*/
- function _insert_batch($table, $keys, $values)
+ protected function _list_tables($prefix_limit = FALSE)
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
- }
-
- // --------------------------------------------------------------------
+ $sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database);
+ if ($prefix_limit !== FALSE && $this->dbprefix !== '')
+ {
+ return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ }
- /**
- * Replace statement
- *
- * Generates a platform-specific replace string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _replace($table, $keys, $values)
- {
- return "REPLACE INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
+ return $sql;
}
-
+
// --------------------------------------------------------------------
/**
- * Update statement
+ * Show column query
*
- * Generates a platform-specific update string from the supplied data
+ * Generates a platform-specific query string so that the column names can be fetched
*
- * @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(), $limit = FALSE)
+ protected function _list_columns($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 $sql;
+ return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
}
// --------------------------------------------------------------------
/**
- * Update_Batch statement
- *
- * Generates a platform-specific batch update string from the supplied data
+ * Returns an object with field data
*
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @return string
+ * @param string $table
+ * @return array
*/
- function _update_batch($table, $values, $index, $where = NULL)
+ public function field_data($table)
{
- $ids = array();
- $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : '';
-
- foreach ($values as $key => $val)
+ if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE)
{
- $ids[] = $val[$index];
-
- foreach (array_keys($val) as $field)
- {
- if ($field != $index)
- {
- $final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
- }
- }
+ return FALSE;
}
+ $query = $query->result_object();
- $sql = "UPDATE ".$table." SET ";
- $cases = '';
-
- foreach ($final as $k => $v)
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
{
- $cases .= $k.' = CASE '."\n";
- foreach ($v as $row)
- {
- $cases .= $row."\n";
- }
-
- $cases .= 'ELSE '.$k.' END, ';
- }
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->Field;
- $sql .= substr($cases, 0, -2);
+ sscanf($query[$i]->Type, '%[a-z](%d)',
+ $retval[$i]->type,
+ $retval[$i]->max_length
+ );
- $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';
+ $retval[$i]->default = $query[$i]->Default;
+ $retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');
+ }
- return $sql;
+ return $retval;
}
// --------------------------------------------------------------------
/**
- * Truncate statement
+ * Error
*
- * Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
+ * Returns an array containing code and message of the last
+ * database error that has occurred.
*
- * @access public
- * @param string the table name
- * @return string
+ * @return array
*/
- function _truncate($table)
+ public function error()
{
- return "TRUNCATE ".$table;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Delete statement
- *
- * Generates a platform-specific delete string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the where clause
- * @param string the limit clause
- * @return string
- */
- function _delete($table, $where = array(), $like = array(), $limit = FALSE)
- {
- $conditions = '';
-
- if (count($where) > 0 OR count($like) > 0)
+ if ( ! empty($this->_mysqli->connect_errno))
{
- $conditions = "\nWHERE ";
- $conditions .= implode("\n", $this->ar_where);
-
- if (count($where) > 0 && count($like) > 0)
- {
- $conditions .= " AND ";
- }
- $conditions .= implode("\n", $like);
+ return array(
+ 'code' => $this->_mysqli->connect_errno,
+ 'message' => $this->_mysqli->connect_error
+ );
}
- $limit = ( ! $limit) ? '' : ' LIMIT '.$limit;
-
- return "DELETE FROM ".$table.$conditions.$limit;
+ return array('code' => $this->conn_id->errno, 'message' => $this->conn_id->error);
}
// --------------------------------------------------------------------
/**
- * Limit string
+ * FROM tables
*
- * Generates a platform-specific LIMIT clause
+ * Groups tables in FROM clauses if needed, so there is no confusion
+ * about operator precedence.
*
- * @access public
- * @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
* @return string
*/
- function _limit($sql, $limit, $offset)
+ protected function _from_tables()
{
- $sql .= "LIMIT ".$limit;
-
- if ($offset > 0)
+ if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
{
- $sql .= " OFFSET ".$offset;
+ return '('.implode(', ', $this->qb_from).')';
}
- return $sql;
+ return implode(', ', $this->qb_from);
}
// --------------------------------------------------------------------
@@ -759,18 +534,11 @@ class CI_DB_mysqli_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
- * @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close()
{
- @mysqli_close($conn_id);
+ $this->conn_id->close();
}
-
}
-
-
-/* End of file mysqli_driver.php */
-/* Location: ./system/database/drivers/mysqli/mysqli_driver.php */ \ No newline at end of file
generated by cgit v1.2.3-24-g4f1b (git 2.32.0) at 2024-06-03 23:42:57 +0200