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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/mysql/mysql_driver.php
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/mysql/mysql_driver.php')
-rw-r--r--system/database/drivers/mysql/mysql_driver.php743
1 files changed, 229 insertions, 514 deletions
diff --git a/system/database/drivers/mysql/mysql_driver.php b/system/database/drivers/mysql/mysql_driver.php
index 832b9d83e..71dad676e 100644
--- a/system/database/drivers/mysql/mysql_driver.php
+++ b/system/database/drivers/mysql/mysql_driver.php
@@ -1,94 +1,175 @@
-<?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 1.0.0
* @filesource
*/
-
-// ------------------------------------------------------------------------
+defined('BASEPATH') OR exit('No direct script access allowed');
/**
* MySQL 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_mysql_driver extends CI_DB {
- var $dbdriver = 'mysql';
-
- // The character used for escaping
- var $_escape_char = '`';
+ /**
+ * Database driver
+ *
+ * @var string
+ */
+ public $dbdriver = 'mysql';
- // clause and character used for LIKE escape sequences - not used in MySQL
- var $_like_escape_str = '';
- var $_like_escape_chr = '';
+ /**
+ * Compression flag
+ *
+ * @var bool
+ */
+ 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 bool
*/
- var $delete_hack = TRUE;
+ public $delete_hack = TRUE;
/**
- * 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.
+ * Strict ON flag
+ *
+ * Whether we're running in strict SQL mode.
+ *
+ * @var bool
*/
- var $_count_string = 'SELECT COUNT(*) AS ';
- var $_random_keyword = ' RAND()'; // database specific random keyword
+ public $stricton;
+
+ // --------------------------------------------------------------------
- // whether SET NAMES must be used to set the character set
- var $use_set_names;
-
/**
- * Non-persistent database connection
+ * Identifier escape character
*
- * @access private called by the base class
- * @return resource
+ * @var string
*/
- function db_connect()
+ protected $_escape_char = '`';
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Class constructor
+ *
+ * @param array $params
+ * @return void
+ */
+ public function __construct($params)
{
- if ($this->port != '')
+ parent::__construct($params);
+
+ if ( ! empty($this->port))
{
$this->hostname .= ':'.$this->port;
}
-
- return @mysql_connect($this->hostname, $this->username, $this->password, TRUE);
}
// --------------------------------------------------------------------
/**
- * Persistent database connection
+ * Non-persistent database connection
*
- * @access private called by the base class
+ * @param bool $persistent
* @return resource
*/
- function db_pconnect()
+ public function db_connect($persistent = FALSE)
{
- if ($this->port != '')
+ $client_flags = ($this->compress === FALSE) ? 0 : MYSQL_CLIENT_COMPRESS;
+
+ if ($this->encrypt === TRUE)
{
- $this->hostname .= ':'.$this->port;
+ $client_flags = $client_flags | MYSQL_CLIENT_SSL;
}
- return @mysql_pconnect($this->hostname, $this->username, $this->password);
+ // Error suppression is necessary mostly due to PHP 5.5+ issuing E_DEPRECATED messages
+ $this->conn_id = ($persistent === TRUE)
+ ? mysql_pconnect($this->hostname, $this->username, $this->password, $client_flags)
+ : mysql_connect($this->hostname, $this->username, $this->password, TRUE, $client_flags);
+
+ // ----------------------------------------------------------------
+
+ // Select the DB... assuming a database name is specified in the config file
+ if ($this->database !== '' && ! $this->db_select())
+ {
+ log_message('error', 'Unable to select database: '.$this->database);
+
+ return ($this->db_debug === TRUE)
+ ? $this->display_error('db_unable_to_select', $this->database)
+ : FALSE;
+ }
+
+ if (isset($this->stricton) && is_resource($this->conn_id))
+ {
+ if ($this->stricton)
+ {
+ $this->simple_query('SET SESSION sql_mode = CONCAT(@@sql_mode, ",", "STRICT_ALL_TABLES")');
+ }
+ else
+ {
+ $this->simple_query(
+ '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", "")'
+ );
+ }
+ }
+
+ return $this->conn_id;
}
// --------------------------------------------------------------------
@@ -99,10 +180,9 @@ class CI_DB_mysql_driver extends CI_DB {
* Keep / reestablish the db connection if no queries have been
* sent for a length of time exceeding the server's idle timeout
*
- * @access public
* @return void
*/
- function reconnect()
+ public function reconnect()
{
if (mysql_ping($this->conn_id) === FALSE)
{
@@ -115,12 +195,24 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Select the database
*
- * @access private called by the base class
- * @return resource
+ * @param string $database
+ * @return bool
*/
- function db_select()
+ public function db_select($database = '')
{
- return @mysql_select_db($this->database, $this->conn_id);
+ if ($database === '')
+ {
+ $database = $this->database;
+ }
+
+ if (mysql_select_db($database, $this->conn_id))
+ {
+ $this->database = $database;
+ $this->data_cache = array();
+ return TRUE;
+ }
+
+ return FALSE;
}
// --------------------------------------------------------------------
@@ -128,40 +220,34 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Set client character set
*
- * @access public
- * @param string
- * @param string
- * @return resource
+ * @param string $charset
+ * @return bool
*/
- function db_set_charset($charset, $collation)
+ protected function _db_set_charset($charset)
{
- if ( ! isset($this->use_set_names))
- {
- // mysql_set_charset() requires PHP >= 5.2.3 and MySQL >= 5.0.7, use SET NAMES as fallback
- $this->use_set_names = (version_compare(PHP_VERSION, '5.2.3', '>=') && version_compare(mysql_get_server_info(), '5.0.7', '>=')) ? FALSE : TRUE;
- }
-
- if ($this->use_set_names === TRUE)
- {
- return @mysql_query("SET NAMES '".$this->escape_str($charset)."' COLLATE '".$this->escape_str($collation)."'", $this->conn_id);
- }
- else
- {
- return @mysql_set_charset($charset, $this->conn_id);
- }
+ return mysql_set_charset($charset, $this->conn_id);
}
// --------------------------------------------------------------------
/**
- * Version number query string
+ * Database version number
*
- * @access public
* @return string
*/
- function _version()
+ public function version()
{
- return "SELECT version() AS ver";
+ if (isset($this->data_cache['version']))
+ {
+ return $this->data_cache['version'];
+ }
+
+ if ( ! $this->conn_id OR ($version = mysql_get_server_info($this->conn_id)) === FALSE)
+ {
+ return FALSE;
+ }
+
+ return $this->data_cache['version'] = $version;
}
// --------------------------------------------------------------------
@@ -169,14 +255,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Execute the query
*
- * @access private called by the base class
- * @param string an SQL query
- * @return resource
+ * @param string $sql an SQL query
+ * @return mixed
*/
- function _execute($sql)
+ protected function _execute($sql)
{
- $sql = $this->_prep_query($sql);
- return @mysql_query($sql, $this->conn_id);
+ return mysql_query($this->_prep_query($sql), $this->conn_id);
}
// --------------------------------------------------------------------
@@ -186,20 +270,16 @@ class CI_DB_mysql_driver extends CI_DB {
*
* If needed, each database adapter can prep the query string
*
- * @access private called by execute()
- * @param string an SQL query
+ * @param string $sql an SQL query
* @return string
*/
- function _prep_query($sql)
+ protected 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)
+ // mysql_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', $sql))
{
- if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $sql))
- {
- $sql = preg_replace("/^\s*DELETE\s+FROM\s+(\S+)\s*$/", "DELETE FROM \\1 WHERE 1=1", $sql);
- }
+ return trim($sql).' WHERE 1=1';
}
return $sql;
@@ -210,30 +290,12 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Begin Transaction
*
- * @access public
* @return bool
*/
- function trans_begin($test_mode = FALSE)
+ protected function _trans_begin()
{
- 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;
- }
-
- // 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;
+ return $this->simple_query('START TRANSACTION'); // can also be BEGIN or BEGIN WORK
}
// --------------------------------------------------------------------
@@ -241,25 +303,17 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Commit Transaction
*
- * @access public
* @return bool
*/
- function trans_commit()
+ protected function _trans_commit()
{
- if ( ! $this->trans_enabled)
- {
- return TRUE;
- }
-
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
+ if ($this->simple_query('COMMIT'))
{
+ $this->simple_query('SET AUTOCOMMIT=1');
return TRUE;
}
- $this->simple_query('COMMIT');
- $this->simple_query('SET AUTOCOMMIT=1');
- return TRUE;
+ return FALSE;
}
// --------------------------------------------------------------------
@@ -267,69 +321,30 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Rollback Transaction
*
- * @access public
* @return bool
*/
- function trans_rollback()
+ protected function _trans_rollback()
{
- if ( ! $this->trans_enabled)
+ if ($this->simple_query('ROLLBACK'))
{
+ $this->simple_query('SET AUTOCOMMIT=1');
return TRUE;
}
- // When transactions are nested we only begin/commit/rollback the outermost ones
- if ($this->_trans_depth > 0)
- {
- return TRUE;
- }
-
- $this->simple_query('ROLLBACK');
- $this->simple_query('SET AUTOCOMMIT=1');
- return TRUE;
+ return FALSE;
}
// --------------------------------------------------------------------
/**
- * Escape String
+ * Platform-dependent string escape
*
- * @access public
* @param string
- * @param bool whether or not the string will be used in a LIKE condition
* @return string
*/
- function escape_str($str, $like = FALSE)
+ protected function _escape_str($str)
{
- if (is_array($str))
- {
- foreach ($str as $key => $val)
- {
- $str[$key] = $this->escape_str($val, $like);
- }
-
- return $str;
- }
-
- if (function_exists('mysql_real_escape_string') AND is_resource($this->conn_id))
- {
- $str = mysql_real_escape_string($str, $this->conn_id);
- }
- 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 $str;
+ return mysql_real_escape_string($str, $this->conn_id);
}
// --------------------------------------------------------------------
@@ -337,12 +352,11 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Affected Rows
*
- * @access public
- * @return integer
+ * @return int
*/
- function affected_rows()
+ public function affected_rows()
{
- return @mysql_affected_rows($this->conn_id);
+ return mysql_affected_rows($this->conn_id);
}
// --------------------------------------------------------------------
@@ -350,43 +364,11 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Insert ID
*
- * @access public
- * @return integer
+ * @return int
*/
- function insert_id()
+ public function insert_id()
{
- return @mysql_insert_id($this->conn_id);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * "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) $row->numrows;
+ return mysql_insert_id($this->conn_id);
}
// --------------------------------------------------------------------
@@ -396,17 +378,16 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific query string so that the table names can be fetched
*
- * @access private
- * @param boolean
+ * @param bool $prefix_limit
* @return string
*/
- function _list_tables($prefix_limit = FALSE)
+ protected function _list_tables($prefix_limit = FALSE)
{
- $sql = "SHOW TABLES FROM ".$this->_escape_char.$this->database.$this->_escape_char;
+ $sql = 'SHOW TABLES FROM '.$this->escape_identifiers($this->database);
- if ($prefix_limit !== FALSE AND $this->dbprefix != '')
+ if ($prefix_limit !== FALSE && $this->dbprefix !== '')
{
- $sql .= " LIKE '".$this->escape_like_str($this->dbprefix)."%'";
+ return $sql." LIKE '".$this->escape_like_str($this->dbprefix)."%'";
}
return $sql;
@@ -419,343 +400,81 @@ class CI_DB_mysql_driver extends CI_DB {
*
* Generates a platform-specific query string so that the column names can be fetched
*
- * @access public
- * @param string the table name
- * @return string
- */
- function _list_columns($table = '')
- {
- return "SHOW COLUMNS FROM ".$this->_protect_identifiers($table, TRUE, NULL, FALSE);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Field data query
- *
- * Generates a platform-specific query so that the column data can be retrieved
- *
- * @access public
- * @param string the table name
- * @return object
- */
- function _field_data($table)
- {
- return "DESCRIBE ".$table;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message string
- *
- * @access private
+ * @param string $table
* @return string
*/
- function _error_message()
- {
- return mysql_error($this->conn_id);
- }
-
- // --------------------------------------------------------------------
-
- /**
- * The error message number
- *
- * @access private
- * @return integer
- */
- function _error_number()
+ protected function _list_columns($table = '')
{
- return mysql_errno($this->conn_id);
+ return 'SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE);
}
// --------------------------------------------------------------------
/**
- * Escape the SQL Identifiers
- *
- * This function escapes column and table names
+ * Returns an object with field data
*
- * @access private
- * @param string
- * @return string
+ * @param string $table
+ * @return array
*/
- function _escape_identifiers($item)
+ public function field_data($table)
{
- if ($this->_escape_char == '')
+ if (($query = $this->query('SHOW COLUMNS FROM '.$this->protect_identifiers($table, TRUE, NULL, FALSE))) === FALSE)
{
- return $item;
+ return FALSE;
}
+ $query = $query->result_object();
- foreach ($this->_reserved_identifiers as $id)
+ $retval = array();
+ for ($i = 0, $c = count($query); $i < $c; $i++)
{
- if (strpos($item, '.'.$id) !== FALSE)
- {
- $str = $this->_escape_char. str_replace('.', $this->_escape_char.'.', $item);
+ $retval[$i] = new stdClass();
+ $retval[$i]->name = $query[$i]->Field;
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
- }
- }
+ sscanf($query[$i]->Type, '%[a-z](%d)',
+ $retval[$i]->type,
+ $retval[$i]->max_length
+ );
- 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;
+ $retval[$i]->default = $query[$i]->Default;
+ $retval[$i]->primary_key = (int) ($query[$i]->Key === 'PRI');
}
- // remove duplicates if the user already included the escape
- return preg_replace('/['.$this->_escape_char.']+/', $this->_escape_char, $str);
+ return $retval;
}
// --------------------------------------------------------------------
/**
- * From Tables
+ * Error
*
- * This function implicitly groups FROM tables so there is no confusion
- * about operator precedence in harmony with SQL standards
+ * Returns an array containing code and message of the last
+ * database error that has occurred.
*
- * @access public
- * @param type
- * @return type
+ * @return array
*/
- function _from_tables($tables)
+ public function error()
{
- if ( ! is_array($tables))
- {
- $tables = array($tables);
- }
-
- return '('.implode(', ', $tables).')';
+ return array('code' => mysql_errno($this->conn_id), 'message' => mysql_error($this->conn_id));
}
// --------------------------------------------------------------------
/**
- * Insert statement
+ * FROM tables
*
- * Generates a platform-specific insert string from the supplied data
+ * Groups tables in FROM clauses if needed, so there is no confusion
+ * about operator precedence.
*
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
* @return string
*/
- function _insert($table, $keys, $values)
+ protected function _from_tables()
{
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
-
- /**
- * Replace statement
- *
- * Generates a platform-specific replace string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _replace($table, $keys, $values)
- {
- return "REPLACE INTO ".$table." (".implode(', ', $keys).") VALUES (".implode(', ', $values).")";
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Insert_batch statement
- *
- * Generates a platform-specific insert string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the insert keys
- * @param array the insert values
- * @return string
- */
- function _insert_batch($table, $keys, $values)
- {
- return "INSERT INTO ".$table." (".implode(', ', $keys).") VALUES ".implode(', ', $values);
- }
-
- // --------------------------------------------------------------------
-
-
- /**
- * Update statement
- *
- * Generates a platform-specific update string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @param array the orderby clause
- * @param array the limit clause
- * @return string
- */
- function _update($table, $values, $where, $orderby = array(), $limit = FALSE)
- {
- foreach ($values as $key => $val)
+ if ( ! empty($this->qb_join) && count($this->qb_from) > 1)
{
- $valstr[] = $key . ' = ' . $val;
+ return '('.implode(', ', $this->qb_from).')';
}
- $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 $sql;
- }
-
- // --------------------------------------------------------------------
-
-
- /**
- * Update_Batch statement
- *
- * Generates a platform-specific batch update string from the supplied data
- *
- * @access public
- * @param string the table name
- * @param array the update data
- * @param array the where clause
- * @return string
- */
- function _update_batch($table, $values, $index, $where = NULL)
- {
- $ids = array();
- $where = ($where != '' AND count($where) >=1) ? implode(" ", $where).' AND ' : '';
-
- foreach ($values as $key => $val)
- {
- $ids[] = $val[$index];
-
- foreach (array_keys($val) as $field)
- {
- if ($field != $index)
- {
- $final[$field][] = 'WHEN '.$index.' = '.$val[$index].' THEN '.$val[$field];
- }
- }
- }
-
- $sql = "UPDATE ".$table." SET ";
- $cases = '';
-
- foreach ($final as $k => $v)
- {
- $cases .= $k.' = CASE '."\n";
- foreach ($v as $row)
- {
- $cases .= $row."\n";
- }
-
- $cases .= 'ELSE '.$k.' END, ';
- }
-
- $sql .= substr($cases, 0, -2);
-
- $sql .= ' WHERE '.$where.$index.' IN ('.implode(',', $ids).')';
-
- return $sql;
- }
-
- // --------------------------------------------------------------------
-
-
- /**
- * Truncate statement
- *
- * Generates a platform-specific truncate string from the supplied data
- * If the database does not support the truncate() command
- * This function maps to "DELETE FROM table"
- *
- * @access public
- * @param string the table name
- * @return string
- */
- function _truncate($table)
- {
- return "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)
- {
- $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.$limit;
- }
-
- // --------------------------------------------------------------------
-
- /**
- * Limit string
- *
- * Generates a platform-specific LIMIT clause
- *
- * @access public
- * @param string the sql query string
- * @param integer the number of rows to limit the query to
- * @param integer the offset value
- * @return string
- */
- function _limit($sql, $limit, $offset)
- {
- if ($offset == 0)
- {
- $offset = '';
- }
- else
- {
- $offset .= ", ";
- }
-
- return $sql."LIMIT ".$offset.$limit;
+ return implode(', ', $this->qb_from);
}
// --------------------------------------------------------------------
@@ -763,17 +482,13 @@ class CI_DB_mysql_driver extends CI_DB {
/**
* Close DB Connection
*
- * @access public
- * @param resource
* @return void
*/
- function _close($conn_id)
+ protected function _close()
{
- @mysql_close($conn_id);
+ // Error suppression to avoid annoying E_WARNINGs in cases
+ // where the connection has already been closed for some reason.
+ @mysql_close($this->conn_id);
}
}
-
-
-/* End of file mysql_driver.php */
-/* Location: ./system/database/drivers/mysql/mysql_driver.php */ \ No newline at end of file