108 lines
3.7 KiB
PHP
108 lines
3.7 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_Expression');
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/**
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* Doctrine_Expression_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_Expression_Sqlite extends Doctrine_Expression {
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/**
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* Returns the md5 sum of the data that SQLite's md5() function receives.
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*
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* @return string
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*/
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public static function md5Impl($data) {
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return md5($data);
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}
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/**
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* Returns the modules of the data that SQLite's mod() function receives.
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*
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* @return string
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*/
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public static function modImpl($dividend, $divisor) {
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return $dividend % $divisor;
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}
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/**
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* Returns a concattenation of the data that SQLite's concat() function receives.
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*
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* @return string
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*/
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public static function concatImpl() {
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$args = func_get_args();
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return join( '', $args );
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}
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/**
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* returns the regular expression operator
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*
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* @return string
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*/
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public function regexp() {
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return 'RLIKE';
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}
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/**
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* Return string to call a variable with the current timestamp inside an SQL statement
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* There are three special variables for current date and time.
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*
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* @return string sqlite function as string
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*/
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public function now($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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* 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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return '((RANDOM() + 2147483648) / 4294967296)';
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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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* Note: Not SQL92, but common functionality.
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*
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* SQLite only supports the 2 parameter variant of this function
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*
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* @param string $value an sql string literal or column name/alias
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* @param integer $position where to start the substring portion
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* @param integer $length the substring portion length
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* @return string SQL substring function with given parameters
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*/
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public function substring($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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