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doctrine2/lib/Doctrine/Connection/Sqlite.php

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<?php
/*
* $Id$
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.phpdoctrine.com>.
*/
Doctrine::autoload("Doctrine_Connection_Common");
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/**
* Doctrine_Connection_Sqlite
*
* @package Doctrine ORM
* @url www.phpdoctrine.com
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @author Konsta Vesterinen
* @author Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)
* @version $Id$
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*/
class Doctrine_Connection_Sqlite extends Doctrine_Connection_Common {
/**
* @var string $driverName the name of this connection driver
*/
protected $driverName = 'Sqlite';
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/**
* the constructor
*
* @param Doctrine_Manager $manager
* @param PDO $pdo database handle
*/
public function __construct(Doctrine_Manager $manager, PDO $pdo) {
$this->supported = array(
'sequences' => 'emulated',
'indexes' => true,
'affected_rows' => true,
'summary_functions' => true,
'order_by_text' => true,
'current_id' => 'emulated',
'limit_queries' => true,
'LOBs' => true,
'replace' => true,
'transactions' => true,
'savepoints' => false,
'sub_selects' => true,
'auto_increment' => true,
'primary_key' => true,
'result_introspection' => false, // not implemented
'prepared_statements' => 'emulated',
'identifier_quoting' => true,
'pattern_escaping' => false,
);
$this->options['base_transaction_name'] = '___php_MDB2_sqlite_auto_commit_off';
$this->options['fixed_float'] = 0;
$this->options['database_path'] = '';
$this->options['database_extension'] = '';
$this->options['server_version'] = '';
parent::__construct($manager, $pdo);
}
/**
* initializes database functions missing in sqlite
*/
public function initFunctions() {
$this->dbh->sqliteCreateFunction('md5', array('Doctrine_Expression_Sqlite', 'md5Impl'), 1);
$this->dbh->sqliteCreateFunction('mod', array('Doctrine_Expression_Sqlite', 'modImpl'), 2);
$this->dbh->sqliteCreateFunction('concat', array('Doctrine_Expression_Sqlite', 'concatImpl'));
$this->dbh->sqliteCreateFunction('now', 'time', 0);
}
/**
* Set the transacton isolation level.
*
* @param string standard isolation level
* READ UNCOMMITTED (allows dirty reads)
* READ COMMITTED (prevents dirty reads)
* REPEATABLE READ (prevents nonrepeatable reads)
* SERIALIZABLE (prevents phantom reads)
* @return void
*/
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public function setTransactionIsolation($isolation) {
switch ($isolation) {
case 'READ UNCOMMITTED':
$isolation = 0;
break;
case 'READ COMMITTED':
case 'REPEATABLE READ':
case 'SERIALIZABLE':
$isolation = 1;
break;
default:
throw new Doctrine_Connection_Sqlite_Exception('Isolation level ' . $isolation . 'is not supported.');
}
$query = "PRAGMA read_uncommitted=$isolation";
return $this->_doQuery($query, true);
}
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/**
* Returns the current id of a sequence
*
* @param string $seq_name name of the sequence
* @return integer the current id in the given sequence
*/
public function currId($sequence) {
$sequence = $this->quoteIdentifier($sequence, true);
$seqColumn = $this->quoteIdentifier($this->options['seqcol_name'], true);
$stmt = $this->dbh->query('SELECT MAX(' . $seqColumn . ') FROM ' . $sequence);
$data = $stmt->fetch(PDO::FETCH_NUM);
return $data[0];
}
}