293 lines
9.1 KiB
PHP
293 lines
9.1 KiB
PHP
<?php
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// +----------------------------------------------------------------------+
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// | PHP versions 4 and 5 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1998-2006 Manuel Lemos, Tomas V.V.Cox, |
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// | Stig. S. Bakken, Lukas Smith |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Lukas Smith <smith@pooteeweet.org> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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/**
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* @package MDB2
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* @category Database
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* @author Lukas Smith <smith@pooteeweet.org>
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*/
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/**
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* Base class for the function modules that is extended by each MDB2 driver
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*
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* To load this module in the MDB2 object:
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* $mdb->loadModule('Function');
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*
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* @package MDB2
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* @category Database
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* @author Lukas Smith <smith@pooteeweet.org>
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*/
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class MDB2_Driver_Function_Common extends MDB2_Module_Common
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{
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// {{{ executeStoredProc()
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/**
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* Execute a stored procedure and return any results
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*
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* @param string $name string that identifies the function to execute
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* @param mixed $params array that contains the paramaters to pass the stored proc
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* @param mixed $types array that contains the types of the columns in
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* the result set
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* @param mixed $result_class string which specifies which result class to use
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* @param mixed $result_wrap_class string which specifies which class to wrap results in
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*
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* @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
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{
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$db = $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$error = $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'method not implemented', __FUNCTION__);
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return $error;
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}
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// }}}
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// {{{ functionTable()
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/**
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* return string for internal table used when calling only a function
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*
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* @return string for internal table used when calling only a function
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* @access public
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*/
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function functionTable()
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{
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return '';
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}
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// }}}
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// {{{ now()
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/**
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* Return string to call a variable with the current timestamp inside an SQL statement
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* There are three special variables for current date and time:
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* - CURRENT_TIMESTAMP (date and time, TIMESTAMP type)
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* - CURRENT_DATE (date, DATE type)
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* - CURRENT_TIME (time, TIME type)
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*
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* @param string $type 'timestamp' | 'time' | 'date'
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*
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* @return string to call a variable with the current timestamp
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* @access public
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*/
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function now($type = 'timestamp')
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{
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switch ($type) {
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case 'time':
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return 'CURRENT_TIME';
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case 'date':
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return 'CURRENT_DATE';
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case 'timestamp':
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default:
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return 'CURRENT_TIMESTAMP';
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}
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}
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// }}}
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// {{{ unixtimestamp()
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/**
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* return string to call a function to get the unix timestamp from a iso timestamp
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*
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* @param string $expression
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*
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* @return string to call a variable with the timestamp
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* @access public
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*/
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function unixtimestamp($expression)
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{
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$db = $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$error = $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'method not implemented', __FUNCTION__);
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return $error;
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}
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// }}}
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// {{{ substring()
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/**
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* return string to call a function to get a substring inside an SQL statement
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*
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* @return string to call a function to get a substring
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* @access public
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*/
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function substring($value, $position = 1, $length = null)
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{
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if (null !== $length) {
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return "SUBSTRING($value FROM $position FOR $length)";
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}
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return "SUBSTRING($value FROM $position)";
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}
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// }}}
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// {{{ replace()
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/**
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* return string to call a function to get replace inside an SQL statement.
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*
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* @return string to call a function to get a replace
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* @access public
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*/
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function replace($str, $from_str, $to_str)
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{
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return "REPLACE($str, $from_str , $to_str)";
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}
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// }}}
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// {{{ concat()
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/**
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* Returns string to concatenate two or more string parameters
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*
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* @param string $value1
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* @param string $value2
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* @param string $values...
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*
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* @return string to concatenate two strings
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* @access public
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*/
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function concat($value1, $value2)
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{
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$args = func_get_args();
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return "(".implode(' || ', $args).")";
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}
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// }}}
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// {{{ random()
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/**
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* return string to call a function to get random value inside an SQL statement
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*
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* @return return string to generate float between 0 and 1
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* @access public
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*/
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function random()
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{
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return 'RAND()';
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}
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// }}}
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// {{{ lower()
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/**
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* return string to call a function to lower the case of an expression
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*
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* @param string $expression
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*
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* @return return string to lower case of an expression
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* @access public
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*/
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function lower($expression)
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{
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return "LOWER($expression)";
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}
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// }}}
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// {{{ upper()
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/**
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* return string to call a function to upper the case of an expression
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*
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* @param string $expression
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*
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* @return return string to upper case of an expression
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* @access public
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*/
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function upper($expression)
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{
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return "UPPER($expression)";
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}
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// }}}
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// {{{ length()
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/**
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* return string to call a function to get the length of a string expression
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*
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* @param string $expression
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*
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* @return return string to get the string expression length
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* @access public
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*/
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function length($expression)
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{
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return "LENGTH($expression)";
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}
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// }}}
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// {{{ guid()
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/**
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* Returns global unique identifier
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*
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* @return string to get global unique identifier
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* @access public
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*/
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function guid()
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{
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$db = $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$error = $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'method not implemented', __FUNCTION__);
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return $error;
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}
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// }}}
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}
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?>
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