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<?php
/**
* ownCloud
*
* @author Robin Appelman
* @copyright 2011 Robin Appelman icewind1991@gmail.com
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU AFFERO GENERAL PUBLIC LICENSE
* License as published by the Free Software Foundation; either
* version 3 of the License, or any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU AFFERO GENERAL PUBLIC LICENSE for more details.
*
* You should have received a copy of the GNU Affero General Public
* License along with this library. If not, see <http://www.gnu.org/licenses/>.
*
*/
require_once('MDB2/Driver/Function/Common.php');
/**
* MDB2 SQLite driver for the function modules
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Function_sqlite3 extends MDB2_Driver_Function_Common
{
// {{{ constructor
/**
* Constructor
*/
function __construct($db_index)
{
parent::__construct($db_index);
// create all sorts of UDFs
}
// {{{ now()
/**
* 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 to call a variable with the current timestamp
* @access public
*/
function now($type = 'timestamp')
{
switch ($type) {
case 'time':
return 'CURRENT_TIME';
case 'date':
return 'CURRENT_DATE';
case 'timestamp':
default:
return 'CURRENT_TIMESTAMP';
}
}
// }}}
// {{{ unixtimestamp()
/**
* return string to call a function to get the unix timestamp from a iso timestamp
*
* @param string $expression
*
* @return string to call a variable with the timestamp
* @access public
*/
function unixtimestamp($expression)
{
return 'strftime("%s",'. $expression.', "utc")';
}
// }}}
// {{{ substring()
/**
* return string to call a function to get a substring inside an SQL statement
*
* @return string to call a function to get a substring
* @access public
*/
function substring($value, $position = 1, $length = null)
{
if (!is_null($length)) {
return "substr($value,$position,$length)";
}
return "substr($value,$position,length($value))";
}
// }}}
// {{{ random()
/**
* 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
*/
function random()
{
return '((RANDOM()+2147483648)/4294967296)';
}
// }}}
// {{{ replace()
/**
* return string to call a function to get a replacement inside an SQL statement.
*
* @return string to call a function to get a replace
* @access public
*/
function replace($str, $from_str, $to_str)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
return $error;
}
// }}}
}
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