122 lines
4.3 KiB
PHP
122 lines
4.3 KiB
PHP
<?php
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/*
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* $Id$
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information, see
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* <http://www.phpdoctrine.com>.
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*/
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Doctrine::autoload('Doctrine_Connection');
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/**
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* Doctrine_Connection_Oracle
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*
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* @package Doctrine ORM
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* @url www.phpdoctrine.com
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* @license LGPL
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*/
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class Doctrine_Connection_Oracle extends Doctrine_Connection {
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/**
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* Adds an driver-specific LIMIT clause to the query
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*
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* @param string $query
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* @param mixed $limit
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* @param mixed $offset
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*/
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public function modifyLimitQuery($query,$limit,$offset) {
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$e = explode("select ",strtolower($query));
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$e2 = explode(" from ",$e[1]);
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$fields = $e2[0];
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$query = "SELECT $fields FROM (SELECT rownum as linenum, $fields FROM ($query) WHERE rownum <= ($offset + $limit)) WHERE linenum >= ".++$offset;
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return $query;
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}
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/**
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* Set the transacton isolation level.
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*
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* @param string standard isolation level
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* READ UNCOMMITTED (allows dirty reads)
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* READ COMMITTED (prevents dirty reads)
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* REPEATABLE READ (prevents nonrepeatable reads)
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* SERIALIZABLE (prevents phantom reads)
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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*/
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function setTransactionIsolation($isolation) {
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switch ($isolation) {
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case 'READ UNCOMMITTED':
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$isolation = 'READ COMMITTED';
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case 'READ COMMITTED':
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case 'REPEATABLE READ':
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$isolation = 'SERIALIZABLE';
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case 'SERIALIZABLE':
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break;
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default:
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throw new Doctrine_Connection_Oracle_Exception('Isolation level ' . $isolation . 'is not supported.');
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}
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$query = 'ALTER SESSION ISOLATION LEVEL ' . $isolation;
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return $this->dbh->query($query);
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}
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/**
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* returns the next value in the given sequence
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* @param string $sequence
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* @return integer
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*/
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public function getNextID($sequence) {
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$stmt = $this->query("SELECT $sequence.nextval FROM dual");
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$data = $stmt->fetch(PDO::FETCH_NUM);
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return $data[0];
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}
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/**
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* Return string to call a variable with the current timestamp inside an SQL statement
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* There are three special variables for current date and time:
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* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
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* - CURRENT_DATE (date, DATE type)
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* - CURRENT_TIME (time, TIME type)
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*
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* @return string to call a variable with the current timestamp
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* @access public
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*/
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function now($type = 'timestamp')
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{
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switch ($type) {
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case 'date':
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case 'time':
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case 'timestamp':
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default:
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return 'TO_CHAR(CURRENT_TIMESTAMP, \'YYYY-MM-DD HH24:MI:SS\')';
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}
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}
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/**
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* substring
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*
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* @return string SQL substring function with given parameters
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*/
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function substring($value, $position = 1, $length = null) {
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if($length !== null)
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return "SUBSTR($value, $position, $length)";
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return "SUBSTR($value, $position)";
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}
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/**
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* random
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*
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* @return string an oracle SQL string that generates a float between 0 and 1
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*/
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function random() {
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return 'dbms_random.value';
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}
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}
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