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<?php
// +----------------------------------------------------------------------+
// | PHP versions 4 and 5 |
// +----------------------------------------------------------------------+
// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
// | Stig. S. Bakken, Lukas Smith |
// | All rights reserved. |
// +----------------------------------------------------------------------+
// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
// | API as well as database abstraction for PHP applications. |
// | This LICENSE is in the BSD license style. |
// | |
// | Redistribution and use in source and binary forms, with or without |
// | modification, are permitted provided that the following conditions |
// | are met: |
// | |
// | Redistributions of source code must retain the above copyright |
// | notice, this list of conditions and the following disclaimer. |
// | |
// | Redistributions in binary form must reproduce the above copyright |
// | notice, this list of conditions and the following disclaimer in the |
// | documentation and/or other materials provided with the distribution. |
// | |
// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
// | Lukas Smith nor the names of his contributors may be used to endorse |
// | or promote products derived from this software without specific prior|
// | written permission. |
// | |
// | 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 |
// | REGENTS 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. |
// +----------------------------------------------------------------------+
// | Author: Lukas Smith <smith@pooteeweet.org> |
// +----------------------------------------------------------------------+
//
// $Id: Common.php,v 1.17 2007/01/12 11:29:12 quipo Exp $
//
/**
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
/**
* Base class for the function modules that is extended by each MDB2 driver
*
* @package MDB2
* @category Database
* @author Lukas Smith <smith@pooteeweet.org>
*/
class MDB2_Driver_Function_Common extends MDB2_Module_Common
{
// {{{ executeStoredProc()
/**
* Execute a stored procedure and return any results
*
* @param string $name string that identifies the function to execute
* @param mixed $params array that contains the paramaters to pass the stored proc
* @param mixed $types array that contains the types of the columns in
* the result set
* @param mixed $result_class string which specifies which result class to use
* @param mixed $result_wrap_class string which specifies which class to wrap results in
* @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
* @access public
*/
function &executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
{
$db =& $this->getDBInstance();
if (PEAR::isError($db)) {
return $db;
}
$error =& $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
'method not implemented', __FUNCTION__);
return $error;
}
// }}}
// {{{ functionTable()
/**
* return string for internal table used when calling only a function
*
* @return string for internal table used when calling only a function
* @access public
*/
function functionTable()
{
return '';
}
// }}}
// {{{ now()
/**
* Return string to call a variable with the current timestamp inside an SQL statement
* There are three special variables for current date and time:
* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
* - CURRENT_DATE (date, DATE type)
* - CURRENT_TIME (time, TIME type)
*
* @return string to call a variable with the current timestamp
* @access public
*/
function now($type = 'timestamp')
{
switch ($type) {
case 'time':
return 'CURRENT_TIME';
case 'date':
return 'CURRENT_DATE';
case 'timestamp':
default:
return 'CURRENT_TIMESTAMP';
}
}
// }}}
// {{{ substring()
/**
* return string to call a function to get a substring inside an SQL statement
*
* @return string to call a function to get a substring
* @access public
*/
function substring($value, $position = 1, $length = null)
{
if (!is_null($length)) {
return "SUBSTRING($value FROM $position FOR $length)";
}
return "SUBSTRING($value FROM $position)";
}
// }}}
// {{{ concat()
/**
* Returns string to concatenate two or more string parameters
*
* @param string $value1
* @param string $value2
* @param string $values...
* @return string to concatenate two strings
* @access public
*/
function concat($value1, $value2)
{
$args = func_get_args();
return "(".implode(' || ', $args).")";
}
// }}}
// {{{ 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 'RAND()';
}
// }}}
// {{{ lower()
/**
* return string to call a function to lower the case of an expression
*
* @param string $expression
* @return return string to lower case of an expression
* @access public
*/
function lower($expression)
{
return "LOWER($expression)";
}
// }}}
// {{{ upper()
/**
* return string to call a function to upper the case of an expression
*
* @param string $expression
* @return return string to upper case of an expression
* @access public
*/
function upper($expression)
{
return "UPPER($expression)";
}
// }}}
// {{{ guid()
/**
* Returns global unique identifier
*
* @return string to get global unique identifier
* @access public
*/
function guid()
{
$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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