| 1 | <?php |
| 2 | /* |
| 3 | * $Id: Mysql.php 2963 2007-10-21 06:23:59Z Jonathan.Wage $ |
| 4 | * |
| 5 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 6 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 7 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| 8 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 9 | * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| 10 | * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| 11 | * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| 12 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
| 13 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
| 14 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE |
| 15 | * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 16 | * |
| 17 | * This software consists of voluntary contributions made by many individuals |
| 18 | * and is licensed under the LGPL. For more information, see |
| 19 | * <http://www.phpdoctrine.org>. |
| 20 | */ |
| 21 | Doctrine::autoload('Doctrine_Sequence'); |
| 22 | /** |
| 23 | * Doctrine_Sequence_Mysql |
| 24 | * |
| 25 | * @package Doctrine |
| 26 | * @subpackage Sequence |
| 27 | * @author Konsta Vesterinen <kvesteri@cc.hut.fi> |
| 28 | * @license http://www.opensource.org/licenses/lgpl-license.php LGPL |
| 29 | * @link www.phpdoctrine.org |
| 30 | * @since 1.0 |
| 31 | * @version $Revision: 2963 $ |
| 32 | */ |
| 33 | class Doctrine_Sequence_Mysql extends Doctrine_Sequence |
| 34 | { |
| 35 | /** |
| 36 | * Returns the next free id of a sequence |
| 37 | * |
| 38 | * @param string $seqName name of the sequence |
| 39 | * @param bool when true missing sequences are automatic created |
| 40 | * |
| 41 | * @return integer next id in the given sequence |
| 42 | */ |
| 43 | public function nextId($seqName, $onDemand = true) |
| 44 | { |
| 45 | $sequenceName = $this->conn->quoteIdentifier($this->conn->formatter->getSequenceName($seqName), true); |
| 46 | $seqcolName = $this->conn->quoteIdentifier($this->conn->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true); |
| 47 | $query = 'INSERT INTO ' . $sequenceName . ' (' . $seqcolName . ') VALUES (NULL)'; |
| 48 | |
| 49 | try { |
| 50 | |
| 51 | $this->conn->exec($query); |
| 52 | |
| 53 | } catch(Doctrine_Connection_Exception $e) { |
| 54 | if ($onDemand && $e->getPortableCode() == Doctrine::ERR_NOSUCHTABLE) { |
| 55 | // Since we are creating the sequence on demand |
| 56 | // we know the first id = 1 so initialize the |
| 57 | // sequence at 2 |
| 58 | try { |
| 59 | $result = $this->conn->export->createSequence($seqName, 2); |
| 60 | } catch(Doctrine_Exception $e) { |
| 61 | throw new Doctrine_Sequence_Exception('on demand sequence ' . $seqName . ' could not be created'); |
| 62 | } |
| 63 | // First ID of a newly created sequence is 1 |
| 64 | return 1; |
| 65 | } |
| 66 | throw $e; |
| 67 | } |
| 68 | |
| 69 | $value = $this->lastInsertId(); |
| 70 | |
| 71 | if (is_numeric($value)) { |
| 72 | $query = 'DELETE FROM ' . $sequenceName . ' WHERE ' . $seqcolName . ' < ' . $value; |
| 73 | $this->conn->exec($query); |
| 74 | /** |
| 75 | TODO: is the following needed ? |
| 76 | if (PEAR::isError($result)) { |
| 77 | $this->warnings[] = 'nextID: could not delete previous sequence table values from '.$seq_name; |
| 78 | } |
| 79 | */ |
| 80 | } |
| 81 | return $value; |
| 82 | } |
| 83 | |
| 84 | /** |
| 85 | * Returns the autoincrement ID if supported or $id or fetches the current |
| 86 | * ID in a sequence called: $table.(empty($field) ? '' : '_'.$field) |
| 87 | * |
| 88 | * @param string name of the table into which a new row was inserted |
| 89 | * @param string name of the field into which a new row was inserted |
| 90 | * @return integer|boolean |
| 91 | */ |
| 92 | public function lastInsertId($table = null, $field = null) |
| 93 | { |
| 94 | return $this->conn->getDbh()->lastInsertId(); |
| 95 | } |
| 96 | |
| 97 | /** |
| 98 | * Returns the current id of a sequence |
| 99 | * |
| 100 | * @param string $seqName name of the sequence |
| 101 | * |
| 102 | * @return integer current id in the given sequence |
| 103 | */ |
| 104 | public function currId($seqName) |
| 105 | { |
| 106 | $sequenceName = $this->conn->quoteIdentifier($this->conn->formatter->getSequenceName($seqName), true); |
| 107 | $seqcolName = $this->conn->quoteIdentifier($this->conn->getAttribute(Doctrine::ATTR_SEQCOL_NAME), true); |
| 108 | $query = 'SELECT MAX(' . $seqcolName . ') FROM ' . $sequenceName; |
| 109 | |
| 110 | return (int) $this->conn->fetchOne($query); |
| 111 | } |
| 112 | } |