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doctrine2/lib/Doctrine/Sequence/Mysql.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_Sequence');
/**
* Doctrine_Sequence_Mysql
*
* @package Doctrine
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @category Object Relational Mapping
* @link www.phpdoctrine.com
* @since 1.0
* @version $Revision$
*/
class Doctrine_Sequence_Mysql extends Doctrine_Sequence
{
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/**
* Returns the next free id of a sequence
*
* @param string $seqName name of the sequence
* @param bool when true missing sequences are automatic created
*
* @return integer next id in the given sequence
*/
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public function nextId($seqName, $ondemand = true)
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{
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$sequenceName = $this->conn->quoteIdentifier($this->conn->formatter->getSequenceName($seqName), true);
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$seqcolName = $this->conn->quoteIdentifier($this->conn->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true);
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$query = 'INSERT INTO ' . $sequenceName . ' (' . $seqcolName . ') VALUES (NULL)';
try {
$this->conn->exec($query);
} catch(Doctrine_Connection_Exception $e) {
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if ($ondemand && $e->getPortableCode() == Doctrine::ERR_NOSUCHTABLE) {
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// Since we are creating the sequence on demand
// we know the first id = 1 so initialize the
// sequence at 2
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try {
$result = $this->conn->export->createSequence($seqName, 2);
} catch(Doctrine_Exception $e) {
throw new Doctrine_Sequence_Exception('on demand sequence ' . $seqName . ' could not be created');
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}
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// First ID of a newly created sequence is 1
return 1;
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}
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throw $e;
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}
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$value = $this->lastInsertId();
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if (is_numeric($value)) {
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$query = 'DELETE FROM ' . $sequenceName . ' WHERE ' . $seqcolName . ' < ' . $value;
$this->conn->exec($query);
/**
TODO: is the following needed ?
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if (PEAR::isError($result)) {
$this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name;
}
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*/
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}
return $value;
}
/**
* Returns the autoincrement ID if supported or $id or fetches the current
* ID in a sequence called: $table.(empty($field) ? '' : '_'.$field)
*
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* @param string name of the table into which a new row was inserted
* @param string name of the field into which a new row was inserted
* @return integer|boolean
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*/
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public function lastInsertId($table = null, $field = null)
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{
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return $this->conn->getDbh()->lastInsertId();
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}
/**
* Returns the current id of a sequence
*
* @param string $seqName name of the sequence
*
* @return integer current id in the given sequence
*/
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public function currId($seqName)
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{
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$sequenceName = $this->conn->quoteIdentifier($this->conn->formatter->getSequenceName($seqName), true);
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$seqcolName = $this->conn->quoteIdentifier($this->conn->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true);
$query = 'SELECT MAX(' . $seqcolName . ') FROM ' . $sequenceName;
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return (int) $this->conn->fetchOne($query);
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}
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}