source: branches/version-2_5-dev/data/module/MDB2/Driver/Function/pgsql.php @ 20116

Revision 20116, 5.2 KB checked in by nanasess, 13 years ago (diff)
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1<?php
2// +----------------------------------------------------------------------+
3// | PHP versions 4 and 5                                                 |
4// +----------------------------------------------------------------------+
5// | Copyright (c) 1998-2008 Manuel Lemos, Tomas V.V.Cox,                 |
6// | Stig. S. Bakken, Lukas Smith                                         |
7// | All rights reserved.                                                 |
8// +----------------------------------------------------------------------+
9// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB  |
10// | API as well as database abstraction for PHP applications.            |
11// | This LICENSE is in the BSD license style.                            |
12// |                                                                      |
13// | Redistribution and use in source and binary forms, with or without   |
14// | modification, are permitted provided that the following conditions   |
15// | are met:                                                             |
16// |                                                                      |
17// | Redistributions of source code must retain the above copyright       |
18// | notice, this list of conditions and the following disclaimer.        |
19// |                                                                      |
20// | Redistributions in binary form must reproduce the above copyright    |
21// | notice, this list of conditions and the following disclaimer in the  |
22// | documentation and/or other materials provided with the distribution. |
23// |                                                                      |
24// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken,    |
25// | Lukas Smith nor the names of his contributors may be used to endorse |
26// | or promote products derived from this software without specific prior|
27// | written permission.                                                  |
28// |                                                                      |
29// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS  |
30// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT    |
31// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS    |
32// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE      |
33// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,          |
34// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
35// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
36// |  OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED  |
37// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT          |
38// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
39// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE          |
40// | POSSIBILITY OF SUCH DAMAGE.                                          |
41// +----------------------------------------------------------------------+
42// | Author: Paul Cooper <pgc@ucecom.com>                                 |
43// +----------------------------------------------------------------------+
44//
45// $Id$
46
47require_once 'MDB2/Driver/Function/Common.php';
48
49/**
50 * MDB2 MySQL driver for the function modules
51 *
52 * @package MDB2
53 * @category Database
54 * @author Lukas Smith <smith@pooteeweet.org>
55 */
56class MDB2_Driver_Function_pgsql extends MDB2_Driver_Function_Common
57{
58    // {{{ executeStoredProc()
59
60    /**
61     * Execute a stored procedure and return any results
62     *
63     * @param string $name string that identifies the function to execute
64     * @param mixed  $params  array that contains the paramaters to pass the stored proc
65     * @param mixed   $types  array that contains the types of the columns in
66     *                        the result set
67     * @param mixed $result_class string which specifies which result class to use
68     * @param mixed $result_wrap_class string which specifies which class to wrap results in
69     * @return mixed a result handle or MDB2_OK on success, a MDB2 error on failure
70     * @access public
71     */
72    function &executeStoredProc($name, $params = null, $types = null, $result_class = true, $result_wrap_class = false)
73    {
74        $db =& $this->getDBInstance();
75        if (PEAR::isError($db)) {
76            return $db;
77        }
78
79        $query = 'SELECT * FROM '.$name;
80        $query .= $params ? '('.implode(', ', $params).')' : '()';
81        return $db->query($query, $types, $result_class, $result_wrap_class);
82    }
83    // }}}
84    // {{{ unixtimestamp()
85
86    /**
87     * return string to call a function to get the unix timestamp from a iso timestamp
88     *
89     * @param string $expression
90     *
91     * @return string to call a variable with the timestamp
92     * @access public
93     */
94    function unixtimestamp($expression)
95    {
96        return 'EXTRACT(EPOCH FROM DATE_TRUNC(\'seconds\', CAST ((' . $expression . ') AS TIMESTAMP)))';
97    }
98
99    // }}}
100    // {{{ random()
101
102    /**
103     * return string to call a function to get random value inside an SQL statement
104     *
105     * @return return string to generate float between 0 and 1
106     * @access public
107     */
108    function random()
109    {
110        return 'RANDOM()';
111    }
112
113    // }}}
114}
115?>
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