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<?php
/*
* $Id: Sqlite.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_Sqlite
*
* @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_Sqlite extends Doctrine_Expression_Driver
{
/**
* Returns the md5 sum of the data that SQLite's md5() function receives.
*
* @param mixed $data
* @return string
*/
public static function md5Impl($data)
{
return md5($data);
}
/**
* Returns the modules of the data that SQLite's mod() function receives.
*
* @param integer $dividend
* @param integer $divisor
* @return string
*/
public static function modImpl($dividend, $divisor)
{
return $dividend % $divisor;
}
/**
* Returns a concatenation of the data that SQLite's concat() function receives.
*
* @return string
*/
public static function concatImpl()
{
$args = func_get_args();
return join('', $args);
}
/**
* locate
* returns the position of the first occurrence of substring $substr in string $str that
* SQLite's locate() function receives
*
* @param string $substr literal string to find
* @param string $str literal string
* @return string
*/
public static function locateImpl($substr, $str)
{
return strpos($str, $substr);
}
public static function sha1Impl($str)
{
return sha1($str);
}
public static function ltrimImpl($str)
{
return ltrim($str);
}
public static function rtrimImpl($str)
{
return rtrim($str);
}
public static function trimImpl($str)
{
return trim($str);
}
public static function nowImpl()
{
return date('Y-m-d h:i:s');
}
/**
* returns the regular expression operator
*
* @return string
*/
public function regexp()
{
return 'RLIKE';
}
/**
* soundex
* Returns a string to call a function to compute the
* soundex encoding of a string
*
* The string "?000" is returned if the argument is NULL.
*
* @param string $value
* @return string SQL soundex function with given parameter
*/
public function soundex($value)
{
return 'SOUNDEX(' . $value . ')';
}
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time.
*
* @return string sqlite function as string
*/
public function now($type = 'timestamp')
{
switch ($type) {
case 'time':
return 'time(\'now\')';
case 'date':
return 'date(\'now\')';
case 'timestamp':
default:
return 'datetime(\'now\')';
}
}
/**
* return string to call a function to get random value inside an SQL statement
*
* @return string to generate float between 0 and 1
*/
public function random()
{
return '((RANDOM() + 2147483648) / 4294967296)';
}
/**
* return string to call a function to get a substring inside an SQL statement
*
* Note: Not SQL92, but common functionality.
*
* SQLite only supports the 2 parameter variant of this function
*
* @param string $value an sql string literal or column name/alias
* @param integer $position where to start the substring portion
* @param integer $length the substring portion length
* @return string SQL substring function with given parameters
*/
public function substring($value, $position, $length = null)
{
if ($length !== null) {
return 'SUBSTR(' . $value . ', ' . $position . ', ' . $length . ')';
}
return 'SUBSTR(' . $value . ', ' . $position . ', LENGTH(' . $value . '))';
}
}