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-rw-r--r--system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php283
1 files changed, 283 insertions, 0 deletions
diff --git a/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
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index 000000000..a29397205
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+++ b/system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php
@@ -0,0 +1,283 @@
+<?php
+/**
+ * CodeIgniter
+ *
+ * An open source application development framework for PHP 5.2.4 or newer
+ *
+ * NOTICE OF LICENSE
+ *
+ * Licensed under the Open Software License version 3.0
+ *
+ * This source file is subject to the Open Software License (OSL 3.0) that is
+ * bundled with this package in the files license.txt / license.rst. It is
+ * also available through the world wide web at this URL:
+ * http://opensource.org/licenses/OSL-3.0
+ * If you did not receive a copy of the license and are unable to obtain it
+ * through the world wide web, please send an email to
+ * licensing@ellislab.com so we can send you a copy immediately.
+ *
+ * @package CodeIgniter
+ * @author EllisLab Dev Team
+ * @copyright Copyright (c) 2008 - 2012, EllisLab, Inc. (http://ellislab.com/)
+ * @license http://opensource.org/licenses/OSL-3.0 Open Software License (OSL 3.0)
+ * @link http://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 http://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;
+
+ // --------------------------------------------------------------------
+
+ /**
+ * 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 && is_php('5.3.6'))
+ {
+ $this->dsn .= ';charset='.$this->char_set;
+ }
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * Database connection
+ *
+ * @param bool $persistent
+ * @return object
+ * @todo SSL support
+ */
+ public function db_connect($persistent = FALSE)
+ {
+ /* Prior to PHP 5.3.6, even if the charset was supplied in the DSN
+ * on connect - it was ignored. This is a work-around for the issue.
+ *
+ * Reference: http://www.php.net/manual/en/ref.pdo-mysql.connection.php
+ */
+ if ( ! is_php('5.3.6') && ! empty($this->char_set))
+ {
+ $this->options[PDO::MYSQL_ATTR_INIT_COMMAND] = 'SET NAMES '.$this->char_set
+ .(empty($this->dbcollat) ? '' : ' COLLATE '.$this->dbcollat);
+ }
+
+ if ($this->compress === TRUE)
+ {
+ $this->options[PDO::MYSQL_ATTR_COMPRESS] = TRUE;
+ }
+
+ return parent::db_connect($persistent);
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * 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 ($table === '')
+ {
+ return ($this->db_debug) ? $this->display_error('db_field_param_missing') : FALSE;
+ }
+
+ if (($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;
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * 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 $index UPDATE key
+ * @return string
+ */
+ protected function _update_batch($table, $values, $index)
+ {
+ $ids = array();
+ foreach ($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];
+ }
+ }
+ }
+
+ $cases = '';
+ foreach ($final as $k => $v)
+ {
+ $cases .= $k." = CASE \n"
+ .implode("\n", $v)."\n"
+ .'ELSE '.$k.' END), ';
+ }
+
+ $this->where($index.' IN('.implode(',', $ids).')', NULL, FALSE);
+
+ return 'UPDATE '.$table.' SET '.substr($cases, 0, -2).$this->_compile_wh('qb_where');
+ }
+
+ // --------------------------------------------------------------------
+
+ /**
+ * 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);
+ }
+
+}
+
+/* End of file pdo_mysql_driver.php */
+/* Location: ./system/database/drivers/pdo/subdrivers/pdo_mysql_driver.php */ \ No newline at end of file