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<?php
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/*
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* $Id: Mssql.php 7490 2010-03-29 19:53:27Z jwage $
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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.doctrine-project.org>.
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*/
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/**
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* Doctrine_Expression_Mssql
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*
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* @package Doctrine
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* @subpackage Expression
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* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
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* @link www.doctrine-project.org
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* @since 1.0
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* @version $Revision: 7490 $
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* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
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*/
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class Doctrine_Expression_Mssql extends Doctrine_Expression_Driver
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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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public function now($type = 'timestamp')
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{
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switch ($type) {
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case 'time':
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case 'date':
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case 'timestamp':
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default:
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return 'GETDATE()';
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}
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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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*/
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public function substring($value, $position, $length = null)
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{
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if ( ! is_null($length)) {
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return 'SUBSTRING(' . $value . ', ' . $position . ', ' . $length . ')';
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}
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return 'SUBSTRING(' . $value . ', ' . $position . ', LEN(' . $value . ') - ' . $position . ' + 1)';
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}
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/**
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* Returns string to concatenate two or more string parameters
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*
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* @param string $arg1
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* @param string $arg2
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* @param string $values...
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* @return string to concatenate two strings
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*/
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public function concat()
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{
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$args = func_get_args();
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return '(' . implode(' + ', $args) . ')';
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}
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/**
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* Returns global unique identifier
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*
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* @return string to get global unique identifier
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*/
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public function guid()
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{
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return 'NEWID()';
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}
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/**
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* Returns the length of a text field
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*
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* @param string $column
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*
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* @return string
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*/
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public function length($column)
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{
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return 'LEN (' . $column . ')';
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}
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}
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