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571 lines
21 KiB
PHP
571 lines
21 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) 1998-2004 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: Paul Cooper <pgc@ucecom.com> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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require_once 'MDB2/Driver/Manager/Common.php';
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/**
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* MDB2 MySQL driver for the management modules
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*
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* @package MDB2
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* @category Database
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* @author Paul Cooper <pgc@ucecom.com>
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*/
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class MDB2_Driver_Manager_pgsql extends MDB2_Driver_Manager_Common
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{
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// {{{ createDatabase()
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/**
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* create a new database
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*
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* @param string $name name of the database that should be created
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function createDatabase($name)
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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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return $db->standaloneQuery("CREATE DATABASE $name");
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}
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// }}}
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// {{{ dropDatabase()
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/**
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* drop an existing database
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*
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* @param string $name name of the database that should be dropped
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function dropDatabase($name)
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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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return $db->standaloneQuery("DROP DATABASE $name");
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}
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// }}}
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// {{{ alterTable()
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/**
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* alter an existing table
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*
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* @param string $name name of the table that is intended to be changed.
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* @param array $changes associative array that contains the details of each type
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* of change that is intended to be performed. The types of
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* changes that are currently supported are defined as follows:
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*
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* name
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*
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* New name for the table.
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*
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* add
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*
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* Associative array with the names of fields to be added as
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* indexes of the array. The value of each entry of the array
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* should be set to another associative array with the properties
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* of the fields to be added. The properties of the fields should
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* be the same as defined by the Metabase parser.
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*
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*
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* remove
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*
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* Associative array with the names of fields to be removed as indexes
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* of the array. Currently the values assigned to each entry are ignored.
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* An empty array should be used for future compatibility.
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*
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* rename
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*
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* Associative array with the names of fields to be renamed as indexes
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* of the array. The value of each entry of the array should be set to
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* another associative array with the entry named name with the new
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* field name and the entry named Declaration that is expected to contain
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* the portion of the field declaration already in DBMS specific SQL code
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* as it is used in the CREATE TABLE statement.
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*
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* change
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*
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* Associative array with the names of the fields to be changed as indexes
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* of the array. Keep in mind that if it is intended to change either the
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* name of a field and any other properties, the change array entries
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* should have the new names of the fields as array indexes.
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*
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* The value of each entry of the array should be set to another associative
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* array with the properties of the fields to that are meant to be changed as
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* array entries. These entries should be assigned to the new values of the
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* respective properties. The properties of the fields should be the same
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* as defined by the Metabase parser.
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*
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* Example
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* array(
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* 'name' => 'userlist',
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* 'add' => array(
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* 'quota' => array(
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* 'type' => 'integer',
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* 'unsigned' => 1
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* )
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* ),
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* 'remove' => array(
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* 'file_limit' => array(),
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* 'time_limit' => array()
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* ),
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* 'change' => array(
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* 'gender' => array(
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* 'default' => 'M',
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* )
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* ),
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* 'rename' => array(
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* 'sex' => array(
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* 'name' => 'gender',
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* )
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* )
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* )
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* @param boolean $check indicates whether the function should just check if the DBMS driver
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* can perform the requested table alterations if the value is true or
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* actually perform them otherwise.
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function alterTable($name, $changes, $check)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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foreach ($changes as $change_name => $change) {
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switch ($change_name) {
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case 'add':
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case 'remove':
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case 'change':
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case 'name':
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break;
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case 'rename':
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default:
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return $db->raiseError(MDB2_ERROR_UNSUPPORTED, null, null,
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'alterTable: change type "'.$change_name.'\" not yet supported');
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}
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}
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if ($check) {
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return MDB2_OK;
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}
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$query = (array_key_exists('name', $changes) ? 'RENAME TO '.$changes['name'] : '');
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if (array_key_exists('add', $changes)) {
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foreach ($changes['add'] as $field_name => $field) {
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$type_declaration = $db->getDeclaration($field['type'], $field_name, $field);
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if (PEAR::isError($type_declaration)) {
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return $err;
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}
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if ($query) {
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$query.= ', ';
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}
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$query.= 'ADD ' . $type_declaration;
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}
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}
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if (array_key_exists('remove', $changes)) {
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foreach ($changes['remove'] as $field_name => $field) {
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if ($query) {
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$query.= ', ';
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}
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$query.= 'DROP ' . $field_name;
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}
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}
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if (array_key_exists('change', $changes)) {
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// missing support to change DEFAULT and NULLability
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foreach ($changes['change'] as $field_name => $field) {
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if ($query) {
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$query.= ', ';
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}
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$db->loadModule('Datatype');
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$query.= "ALTER $field_name TYPE ".$db->datatype->getTypeDeclaration($field);
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}
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}
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if (!$query) {
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return MDB2_OK;
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}
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return $db->query("ALTER TABLE $name $query");
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}
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// }}}
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// {{{ listDatabases()
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/**
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* list all databases
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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**/
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function listDatabases()
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$result = $db->standaloneQuery('SELECT datname FROM pg_database');
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if (!MDB2::isResultCommon($result)) {
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return $result;
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}
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$col = $result->fetchCol();
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$result->free();
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return $col;
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}
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// }}}
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// {{{ listUsers()
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/**
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* list all users
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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**/
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function listUsers()
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$result = $db->standaloneQuery('SELECT usename FROM pg_user');
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if (!MDB2::isResultCommon($result)) {
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return $result;
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}
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$col = $result->fetchCol();
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$result->free();
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return $col;
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}
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// }}}
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// {{{ listViews()
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/**
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* list the views in the database
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*
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function listViews()
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$query = 'SELECT viewname FROM pg_views';
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return $db->queryCol($query);
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}
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// }}}
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// {{{ listFunctions()
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/**
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* list all functions in the current database
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listFunctions()
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$query = "
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SELECT
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proname
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FROM
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pg_proc pr,
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pg_type tp
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WHERE
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tp.oid = pr.prorettype
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AND pr.proisagg = FALSE
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AND tp.typname <> 'trigger'
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AND pr.pronamespace IN
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(SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
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return $db->queryCol($query);
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}
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// }}}
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// {{{ listTables()
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/**
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* list all tables in the current database
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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**/
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function listTables()
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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// gratuitously stolen from PEAR DB _getSpecialQuery in pgsql.php
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$query = 'SELECT c.relname AS "Name"'
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. ' FROM pg_class c, pg_user u'
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. ' WHERE c.relowner = u.usesysid'
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. " AND c.relkind = 'r'"
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. ' AND NOT EXISTS'
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. ' (SELECT 1 FROM pg_views'
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. ' WHERE viewname = c.relname)'
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. " AND c.relname !~ '^(pg_|sql_)'"
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. ' UNION'
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. ' SELECT c.relname AS "Name"'
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. ' FROM pg_class c'
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. " WHERE c.relkind = 'r'"
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. ' AND NOT EXISTS'
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. ' (SELECT 1 FROM pg_views'
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. ' WHERE viewname = c.relname)'
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. ' AND NOT EXISTS'
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. ' (SELECT 1 FROM pg_user'
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. ' WHERE usesysid = c.relowner)'
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. " AND c.relname !~ '^pg_'";
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return $db->queryCol($query);
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}
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// }}}
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// {{{ listTableFields()
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/**
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* list all fields in a tables in the current database
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listTableFields($table)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$result = $db->query("SELECT * FROM $table");
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if (PEAR::isError($result)) {
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return $result;
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}
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$columns = $result->getColumnNames();
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$result->free();
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if (PEAR::isError($columns)) {
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return $columns;
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}
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return array_flip($columns);
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}
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// }}}
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// {{{ createIndex()
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/**
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* get the stucture of a field into an array
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*
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* @param string $table name of the table on which the index is to be created
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* @param string $name name of the index to be created
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* @param array $definition associative array that defines properties of the index to be created.
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* Currently, only one property named FIELDS is supported. This property
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* is also an associative with the names of the index fields as array
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* indexes. Each entry of this array is set to another type of associative
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* array that specifies properties of the index that are specific to
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* each field.
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*
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* Currently, only the sorting property is supported. It should be used
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* to define the sorting direction of the index. It may be set to either
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* ascending or descending.
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*
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* Not all DBMS support index sorting direction configuration. The DBMS
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* drivers of those that do not support it ignore this property. Use the
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* function supports() to determine whether the DBMS driver can manage indexes.
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*
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* Example
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* array(
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* 'fields' => array(
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* 'user_name' => array(
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* 'sorting' => 'ascending'
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* ),
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* 'last_login' => array()
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* )
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* )
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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*/
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function createIndex($table, $name, $definition)
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{
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$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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if (array_key_exists('primary', $definition) && $definition['primary']) {
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$query = "ALTER TABLE $table ADD CONSTRAINT $name PRIMARY KEY (";
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} else {
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$query = 'CREATE';
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if (array_key_exists('unique', $definition) && $definition['unique']) {
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$query.= ' UNIQUE';
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}
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$query.= " INDEX $name ON $table (";
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}
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$query.= implode(', ', array_keys($definition['fields']));
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$query.= ')';
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return $db->query($query);
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}
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// }}}
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// {{{ listTableIndexes()
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/**
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* list all indexes in a table
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*
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* @param string $table name of table that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function listTableIndexes($table)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$subquery = "SELECT indexrelid FROM pg_index, pg_class";
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$subquery.= " WHERE (pg_class.relname='$table') AND (pg_class.oid=pg_index.indrelid)";
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return $db->queryCol("SELECT relname FROM pg_class WHERE oid IN ($subquery)");
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}
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// }}}
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// {{{ createSequence()
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/**
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* create sequence
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*
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* @param string $seq_name name of the sequence to be created
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* @param string $start start value of the sequence; default is 1
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function createSequence($seq_name, $start = 1)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$sequence_name = $db->getSequenceName($seq_name);
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return $db->query("CREATE SEQUENCE $sequence_name INCREMENT 1".
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($start < 1 ? " MINVALUE $start" : '')." START $start");
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}
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// }}}
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// {{{ dropSequence()
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/**
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* drop existing sequence
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*
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* @param string $seq_name name of the sequence to be dropped
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* @return mixed MDB2_OK on success, a MDB2 error on failure
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* @access public
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**/
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function dropSequence($seq_name)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$sequence_name = $db->getSequenceName($seq_name);
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return $db->query("DROP SEQUENCE $sequence_name");
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}
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// }}}
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// {{{ listSequences()
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/**
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* list all sequences in the current database
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*
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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**/
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function listSequences()
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{
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$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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|
|
$query = "SELECT relname FROM pg_class WHERE relkind = 'S' AND relnamespace IN";
|
|
$query.= "(SELECT oid FROM pg_namespace WHERE nspname NOT LIKE 'pg_%' AND nspname != 'information_schema')";
|
|
$table_names = $db->queryCol($query);
|
|
if (PEAR::isError($table_names)) {
|
|
return $table_names;
|
|
}
|
|
$sequences = array();
|
|
for ($i = 0, $j = count($table_names); $i < $j; ++$i) {
|
|
if ($sqn = $this->_isSequenceName($table_names[$i]))
|
|
$sequences[] = $sqn;
|
|
}
|
|
return $sequences;
|
|
}
|
|
}
|
|
?>
|