99 lines
3.4 KiB
PHP
99 lines
3.4 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_Common");
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/**
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* Doctrine_Connection_Sqlite
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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_Sqlite extends Doctrine_Connection_Common {
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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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*
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* @return string sqlite function as string
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*/
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public function now($type = 'timestamp') {
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switch ($type) {
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case 'time':
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return 'time(\'now\')';
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case 'date':
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return 'date(\'now\')';
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case 'timestamp':
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default:
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return 'datetime(\'now\')';
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}
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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 void
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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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$isolation = 0;
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break;
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case 'READ COMMITTED':
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case 'REPEATABLE READ':
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case 'SERIALIZABLE':
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$isolation = 1;
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break;
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default:
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throw new Doctrine_Connection_Sqlite_Exception('Isolation level ' . $isolation . 'is not supported.');
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}
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$query = "PRAGMA read_uncommitted=$isolation";
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return $this->_doQuery($query, true);
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}
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/**
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* return string to call a function to get a substring inside an SQL statement
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*
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* @return string to call a function to get a substring
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* @access public
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*/
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public 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,$position,length($value))";
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}
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/**
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* return string to call a function to get random value inside an SQL statement
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*
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* @return string to generate float between 0 and 1
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*/
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public function random()
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{
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return '((RANDOM() + 2147483648) / 4294967296)';
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}
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}
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