Query/drivers/mysql.php

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<?php
/**
* Query
*
* Free Query Builder / Database Abstraction Layer
*
* @author Timothy J. Warren
* @copyright Copyright (c) 2012
* @link https://github.com/aviat4ion/Query
* @license http://philsturgeon.co.uk/code/dbad-license
*/
// --------------------------------------------------------------------------
/**
* MySQL specific class
*
* @extends DB_PDO
*/
class MySQL extends DB_PDO {
/**
* Connect to MySQL Database
*
* @param string $dsn
* @param string $username=null
* @param string $password=null
* @param array $options=array()
*/
public function __construct($dsn, $username=null, $password=null, $options=array())
{
parent::__construct("mysql:$dsn", $username, $password, $options);
$class = __CLASS__.'_sql';
$this->sql = new $class;
}
// --------------------------------------------------------------------------
/**
* Empty a table
*
* @param string $table
*/
public function truncate($table)
{
$this->query("TRUNCATE `{$table}`");
}
// --------------------------------------------------------------------------
/**
* Get databases for the current connection
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*
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* @return array
*/
public function get_dbs()
{
$res = $this->query("SHOW DATABASES");
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$vals = array_values($res->fetchAll(PDO::FETCH_ASSOC));
$return = array();
foreach($vals as $v)
{
$return[] = $v['Database'];
}
return $return;
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}
// --------------------------------------------------------------------------
/**
* Returns the tables available in the current database
*
* @return array
*/
public function get_tables()
{
$res = $this->query("SHOW TABLES");
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$tables = array();
$rows = $res->fetchAll(PDO::FETCH_NUM);
foreach($rows as $r)
{
$tables[] = $r[0];
}
return $tables;
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}
// --------------------------------------------------------------------------
/**
* Returns system tables for the current database
*
* @return array
*/
public function get_system_tables()
{
//MySQL doesn't have system tables
return array();
}
// --------------------------------------------------------------------------
/**
* Return the number of rows returned for a SELECT query
*
* @return int
*/
public function num_rows()
{
return isset($this->statement) ? $this->statement->rowCount() : FALSE;
}
// --------------------------------------------------------------------------
/**
* Create an SQL backup file for the current database's structure
*
* @return string
*/
public function backup_structure()
{
// @todo Implement Backup function
return '';
}
// --------------------------------------------------------------------------
/**
* Create an SQL backup file for the current database's data
*
* @return string
*/
public function backup_data()
{
// @todo Implement Backup function
return '';
}
// --------------------------------------------------------------------------
/**
* Surrounds the string with the databases identifier escape characters
*
* @param string $ident
* @return string
*/
public function quote_ident($ident)
{
if (is_array($ident))
{
return array_map(array($this, 'quote_ident'), $ident);
}
// Split each identifier by the period
$hiers = explode('.', $ident);
return '`'.implode('`.`', $hiers).'`';
}
}
//End of mysql.php