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<?php
/*
* $Id: Mssql.php 10831 2013-05-29 19:32:17Z btowles $
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* This software consists of voluntary contributions made by many individuals
* and is licensed under the LGPL. For more information, see
* <http://www.doctrine-project.org>.
*/
/**
* Doctrine_Expression_Mssql
*
* @package Doctrine
* @subpackage Expression
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.doctrine-project.org
* @since 1.0
* @version $Revision: 7490 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Expression_Mssql extends Doctrine_Expression_Driver
{
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time:
* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
* - CURRENT_DATE (date, DATE type)
* - CURRENT_TIME (time, TIME type)
*
* @return string to call a variable with the current timestamp
* @access public
*/
public function now($type = 'timestamp')
{
switch ($type) {
case 'time':
case 'date':
case 'timestamp':
default:
return 'GETDATE()';
}
}
/**
* return string to call a function to get a substring inside an SQL statement
*
* @return string to call a function to get a substring
*/
public function substring($value, $position, $length = null)
{
if ( ! is_null($length)) {
return 'SUBSTRING(' . $value . ', ' . $position . ', ' . $length . ')';
}
return 'SUBSTRING(' . $value . ', ' . $position . ', LEN(' . $value . ') - ' . $position . ' + 1)';
}
/**
* Returns string to concatenate two or more string parameters
*
* @param string $arg1
* @param string $arg2
* @param string $values...
* @return string to concatenate two strings
*/
public function concat()
{
$args = func_get_args();
return '(' . implode(' + ', $args) . ')';
}
/**
* Returns global unique identifier
*
* @return string to get global unique identifier
*/
public function guid()
{
return 'NEWID()';
}
/**
* Returns the length of a text field
*
* @param string $column
*
* @return string
*/
public function length($column)
{
return 'LEN (' . $column . ')';
}
}