114 lines
3.9 KiB
PHP
114 lines
3.9 KiB
PHP
<?php
|
|
/*
|
|
* $Id$
|
|
*
|
|
* 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.phpdoctrine.com>.
|
|
*/
|
|
Doctrine::autoload('Doctrine_Expression');
|
|
/**
|
|
* Doctrine_Expression_Pgsql
|
|
*
|
|
* @package Doctrine
|
|
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
|
|
* @category Object Relational Mapping
|
|
* @link www.phpdoctrine.com
|
|
* @since 1.0
|
|
* @version $Revision$
|
|
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
|
|
*/
|
|
class Doctrine_Expression_Pgsql extends Doctrine_Expression {
|
|
/**
|
|
* Returns the md5 sum of a field.
|
|
*
|
|
* Note: Not SQL92, but common functionality
|
|
*
|
|
* md5() works with the default PostgreSQL 8 versions.
|
|
*
|
|
* If you are using PostgreSQL 7.x or older you need
|
|
* to make sure that the digest procedure is installed.
|
|
* If you use RPMS (Redhat and Mandrake) install the postgresql-contrib
|
|
* package. You must then install the procedure by running this shell command:
|
|
* <code>
|
|
* psql [dbname] < /usr/share/pgsql/contrib/pgcrypto.sql
|
|
* </code>
|
|
* You should make sure you run this as the postgres user.
|
|
*
|
|
* @return string
|
|
*/
|
|
public function md5($column) {
|
|
$column = $this->getIdentifier($column);
|
|
|
|
if ($this->version > 7)
|
|
return 'MD5(' . $column . ')';
|
|
else
|
|
return 'encode(digest(' . $column .', md5), hex)';
|
|
}
|
|
|
|
/**
|
|
* Returns part of a string.
|
|
*
|
|
* Note: Not SQL92, but common functionality.
|
|
*
|
|
* @param string $value the target $value the string or the string column.
|
|
* @param int $from extract from this characeter.
|
|
* @param int $len extract this amount of characters.
|
|
* @return string sql that extracts part of a string.
|
|
*/
|
|
public function substring($value, $from, $len = null) {
|
|
$value = $this->getIdentifier($value);
|
|
|
|
if ($len === null) {
|
|
$len = $this->getIdentifier($len);
|
|
return 'SUBSTR(' . $value . ', ' . $from . ')';
|
|
} else
|
|
return 'SUBSTR(' . $value . ', ' . $from . ', ' . $len . ')';
|
|
}
|
|
|
|
/**
|
|
* Returns a series of strings concatinated
|
|
*
|
|
* concat() accepts an arbitrary number of parameters. Each parameter
|
|
* must contain an expression or an array with expressions.
|
|
*
|
|
* @param string|array(string) strings that will be concatinated.
|
|
* @return string
|
|
*/
|
|
public function concat($arg1, $arg2) {
|
|
$args = func_get_args();
|
|
$cols = $this->getIdentifiers($cols);
|
|
|
|
return join(' || ' , $cols);
|
|
}
|
|
/**
|
|
* regexp
|
|
*
|
|
* @return string the regular expression operator
|
|
*/
|
|
public function regexp() {
|
|
return 'SIMILAR TO';
|
|
}
|
|
/**
|
|
* return string to call a function to get random value inside an SQL statement
|
|
*
|
|
* @return return string to generate float between 0 and 1
|
|
* @access public
|
|
*/
|
|
public function random() {
|
|
return 'RANDOM()';
|
|
}
|
|
}
|