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<?php
/*
* $Id: Oracle.php 5789 2009-06-01 08:22:50Z piccoloprincipe $
*
* 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.org>.
*/
/**
* Doctrine_Expression_Sqlite
*
* @package Doctrine
* @subpackage Expression
* @license http://www.opensource.org/licenses/lgpl-license.php LGPL
* @link www.phpdoctrine.org
* @since 1.0
* @version $Revision: 5789 $
* @author Konsta Vesterinen <kvesteri@cc.hut.fi>
*/
class Doctrine_Expression_Oracle extends Doctrine_Expression_Driver
{
/**
* Returns a series of strings concatinated
*
* concat() accepts an arbitrary number of parameters. Each parameter
* must contain an expression
*
* @param string $arg1, $arg2 ... $argN strings that will be concatinated.
* @return string
*/
public function concat()
{
$args = func_get_args();
return join(' || ' , $args);
}
/**
* return string to call a function to get a substring inside an SQL statement
*
* Note: Not SQL92, but common functionality.
*
* @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, $position)";
}
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time:
* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
* - CURRENT_DATE (date, DATE type)
* - CURRENT_TIME (time, TIME type)
*
* @return string to call a variable with the current timestamp
*/
public function now($type = 'timestamp')
{
switch ($type) {
case 'date':
case 'time':
case 'timestamp':
default:
return 'TO_CHAR(CURRENT_TIMESTAMP, \'YYYY-MM-DD HH24:MI:SS\')';
}
}
/**
* random
*
* @return string an oracle SQL string that generates a float between 0 and 1
*/
public function random()
{
return 'dbms_random.value';
}
/**
* Returns global unique identifier
*
* @return string to get global unique identifier
*/
public function guid()
{
return 'SYS_GUID()';
}
}
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