forked from GNUsocial/gnu-social
575 lines
24 KiB
PHP
575 lines
24 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) 1998-2008 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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// | Authors: Paul Cooper <pgc@ucecom.com> |
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// | Lorenzo Alberton <l.alberton@quipo.it> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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require_once 'MDB2/Driver/Reverse/Common.php';
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/**
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* MDB2 PostGreSQL driver for the schema reverse engineering module
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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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* @author Lorenzo Alberton <l.alberton@quipo.it>
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*/
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class MDB2_Driver_Reverse_pgsql extends MDB2_Driver_Reverse_Common
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{
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// {{{ getTableFieldDefinition()
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/**
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* Get the structure of a field into an array
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*
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* @param string $table_name name of table that should be used in method
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* @param string $field_name name of field that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function getTableFieldDefinition($table_name, $field_name)
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{
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$db = $this->getDBInstance();
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if (MDB2::isError($db)) {
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return $db;
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}
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$result = $db->loadModule('Datatype', null, true);
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if (MDB2::isError($result)) {
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return $result;
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}
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list($schema, $table) = $this->splitTableSchema($table_name);
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$query = "SELECT a.attname AS name,
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t.typname AS type,
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CASE a.attlen
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WHEN -1 THEN
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CASE t.typname
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WHEN 'numeric' THEN (a.atttypmod / 65536)
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WHEN 'decimal' THEN (a.atttypmod / 65536)
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WHEN 'money' THEN (a.atttypmod / 65536)
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ELSE CASE a.atttypmod
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WHEN -1 THEN NULL
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ELSE a.atttypmod - 4
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END
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END
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ELSE a.attlen
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END AS length,
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CASE t.typname
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WHEN 'numeric' THEN (a.atttypmod % 65536) - 4
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WHEN 'decimal' THEN (a.atttypmod % 65536) - 4
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WHEN 'money' THEN (a.atttypmod % 65536) - 4
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ELSE 0
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END AS scale,
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a.attnotnull,
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a.atttypmod,
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a.atthasdef,
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(SELECT substring(pg_get_expr(d.adbin, d.adrelid) for 128)
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FROM pg_attrdef d
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WHERE d.adrelid = a.attrelid
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AND d.adnum = a.attnum
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AND a.atthasdef
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) as default
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FROM pg_attribute a,
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pg_class c,
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pg_type t
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WHERE c.relname = ".$db->quote($table, 'text')."
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AND a.atttypid = t.oid
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AND c.oid = a.attrelid
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AND NOT a.attisdropped
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AND a.attnum > 0
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AND a.attname = ".$db->quote($field_name, 'text')."
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ORDER BY a.attnum";
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$column = $db->queryRow($query, null, MDB2_FETCHMODE_ASSOC);
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if (MDB2::isError($column)) {
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return $column;
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}
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if (empty($column)) {
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return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'it was not specified an existing table column', __FUNCTION__);
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}
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$column = array_change_key_case($column, CASE_LOWER);
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$mapped_datatype = $db->datatype->mapNativeDatatype($column);
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if (MDB2::isError($mapped_datatype)) {
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return $mapped_datatype;
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}
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list($types, $length, $unsigned, $fixed) = $mapped_datatype;
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$notnull = false;
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if (!empty($column['attnotnull']) && $column['attnotnull'] == 't') {
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$notnull = true;
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}
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$default = null;
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if ($column['atthasdef'] === 't'
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&& strpos($column['default'], 'NULL') !== 0
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&& !preg_match("/nextval\('([^']+)'/", $column['default'])
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) {
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$pattern = '/^\'(.*)\'::[\w ]+$/i';
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$default = $column['default'];#substr($column['adsrc'], 1, -1);
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if ((null === $default) && $notnull) {
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$default = '';
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} elseif (!empty($default) && preg_match($pattern, $default)) {
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//remove data type cast
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$default = preg_replace ($pattern, '\\1', $default);
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}
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}
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$autoincrement = false;
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if (preg_match("/nextval\('([^']+)'/", $column['default'], $nextvals)) {
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$autoincrement = true;
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}
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$definition[0] = array('notnull' => $notnull, 'nativetype' => $column['type']);
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if (null !== $length) {
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$definition[0]['length'] = $length;
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}
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if (null !== $unsigned) {
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$definition[0]['unsigned'] = $unsigned;
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}
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if (null !== $fixed) {
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$definition[0]['fixed'] = $fixed;
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}
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if ($default !== false) {
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$definition[0]['default'] = $default;
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}
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if ($autoincrement !== false) {
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$definition[0]['autoincrement'] = $autoincrement;
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}
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foreach ($types as $key => $type) {
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$definition[$key] = $definition[0];
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if ($type == 'clob' || $type == 'blob') {
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unset($definition[$key]['default']);
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}
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$definition[$key]['type'] = $type;
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$definition[$key]['mdb2type'] = $type;
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}
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return $definition;
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}
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// }}}
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// {{{ getTableIndexDefinition()
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/**
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* Get the structure of an index into an array
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*
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* @param string $table_name name of table that should be used in method
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* @param string $index_name name of index that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function getTableIndexDefinition($table_name, $index_name)
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{
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$db = $this->getDBInstance();
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if (MDB2::isError($db)) {
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return $db;
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}
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list($schema, $table) = $this->splitTableSchema($table_name);
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$query = 'SELECT relname, indkey FROM pg_index, pg_class';
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$query.= ' WHERE pg_class.oid = pg_index.indexrelid';
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$query.= " AND indisunique != 't' AND indisprimary != 't'";
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$query.= ' AND pg_class.relname = %s';
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$index_name_mdb2 = $db->getIndexName($index_name);
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$row = $db->queryRow(sprintf($query, $db->quote($index_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
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if (MDB2::isError($row) || empty($row)) {
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// fallback to the given $index_name, without transformation
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$row = $db->queryRow(sprintf($query, $db->quote($index_name, 'text')), null, MDB2_FETCHMODE_ASSOC);
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}
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if (MDB2::isError($row)) {
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return $row;
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}
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if (empty($row)) {
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return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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'it was not specified an existing table index', __FUNCTION__);
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}
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$row = array_change_key_case($row, CASE_LOWER);
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$db->loadModule('Manager', null, true);
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$columns = $db->manager->listTableFields($table_name);
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$definition = array();
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$index_column_numbers = explode(' ', $row['indkey']);
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$colpos = 1;
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foreach ($index_column_numbers as $number) {
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$definition['fields'][$columns[($number - 1)]] = array(
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'position' => $colpos++,
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'sorting' => 'ascending',
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);
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}
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return $definition;
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}
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// }}}
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// {{{ getTableConstraintDefinition()
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/**
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* Get the structure of a constraint into an array
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*
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* @param string $table_name name of table that should be used in method
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* @param string $constraint_name name of constraint that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*/
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function getTableConstraintDefinition($table_name, $constraint_name)
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{
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$db = $this->getDBInstance();
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if (MDB2::isError($db)) {
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return $db;
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}
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list($schema, $table) = $this->splitTableSchema($table_name);
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$query = "SELECT c.oid,
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c.conname AS constraint_name,
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CASE WHEN c.contype = 'c' THEN 1 ELSE 0 END AS \"check\",
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CASE WHEN c.contype = 'f' THEN 1 ELSE 0 END AS \"foreign\",
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CASE WHEN c.contype = 'p' THEN 1 ELSE 0 END AS \"primary\",
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CASE WHEN c.contype = 'u' THEN 1 ELSE 0 END AS \"unique\",
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CASE WHEN c.condeferrable = 'f' THEN 0 ELSE 1 END AS deferrable,
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CASE WHEN c.condeferred = 'f' THEN 0 ELSE 1 END AS initiallydeferred,
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--array_to_string(c.conkey, ' ') AS constraint_key,
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t.relname AS table_name,
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t2.relname AS references_table,
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CASE confupdtype
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WHEN 'a' THEN 'NO ACTION'
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WHEN 'r' THEN 'RESTRICT'
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WHEN 'c' THEN 'CASCADE'
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WHEN 'n' THEN 'SET NULL'
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WHEN 'd' THEN 'SET DEFAULT'
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END AS onupdate,
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CASE confdeltype
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WHEN 'a' THEN 'NO ACTION'
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WHEN 'r' THEN 'RESTRICT'
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WHEN 'c' THEN 'CASCADE'
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WHEN 'n' THEN 'SET NULL'
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WHEN 'd' THEN 'SET DEFAULT'
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END AS ondelete,
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CASE confmatchtype
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WHEN 'u' THEN 'UNSPECIFIED'
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WHEN 'f' THEN 'FULL'
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WHEN 'p' THEN 'PARTIAL'
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END AS match,
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--array_to_string(c.confkey, ' ') AS fk_constraint_key,
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consrc
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FROM pg_constraint c
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LEFT JOIN pg_class t ON c.conrelid = t.oid
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LEFT JOIN pg_class t2 ON c.confrelid = t2.oid
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WHERE c.conname = %s
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AND t.relname = " . $db->quote($table, 'text');
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$constraint_name_mdb2 = $db->getIndexName($constraint_name);
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$row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
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if (MDB2::isError($row) || empty($row)) {
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// fallback to the given $index_name, without transformation
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$constraint_name_mdb2 = $constraint_name;
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$row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
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}
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if (MDB2::isError($row)) {
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return $row;
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}
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$uniqueIndex = false;
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if (empty($row)) {
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// We might be looking for a UNIQUE index that was not created
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// as a constraint but should be treated as such.
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$query = 'SELECT relname AS constraint_name,
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indkey,
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0 AS "check",
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0 AS "foreign",
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0 AS "primary",
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1 AS "unique",
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0 AS deferrable,
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0 AS initiallydeferred,
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NULL AS references_table,
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NULL AS onupdate,
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NULL AS ondelete,
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NULL AS match
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FROM pg_index, pg_class
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WHERE pg_class.oid = pg_index.indexrelid
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AND indisunique = \'t\'
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AND pg_class.relname = %s';
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$constraint_name_mdb2 = $db->getIndexName($constraint_name);
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$row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
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if (MDB2::isError($row) || empty($row)) {
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// fallback to the given $index_name, without transformation
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$constraint_name_mdb2 = $constraint_name;
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$row = $db->queryRow(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null, MDB2_FETCHMODE_ASSOC);
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}
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if (MDB2::isError($row)) {
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return $row;
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}
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if (empty($row)) {
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return $db->raiseError(MDB2_ERROR_NOT_FOUND, null, null,
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$constraint_name . ' is not an existing table constraint', __FUNCTION__);
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}
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$uniqueIndex = true;
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}
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$row = array_change_key_case($row, CASE_LOWER);
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$definition = array(
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'primary' => (boolean)$row['primary'],
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'unique' => (boolean)$row['unique'],
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'foreign' => (boolean)$row['foreign'],
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'check' => (boolean)$row['check'],
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'fields' => array(),
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'references' => array(
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'table' => $row['references_table'],
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'fields' => array(),
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),
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'deferrable' => (boolean)$row['deferrable'],
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'initiallydeferred' => (boolean)$row['initiallydeferred'],
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'onupdate' => $row['onupdate'],
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'ondelete' => $row['ondelete'],
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'match' => $row['match'],
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);
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if ($uniqueIndex) {
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$db->loadModule('Manager', null, true);
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$columns = $db->manager->listTableFields($table_name);
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$index_column_numbers = explode(' ', $row['indkey']);
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$colpos = 1;
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foreach ($index_column_numbers as $number) {
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$definition['fields'][$columns[($number - 1)]] = array(
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'position' => $colpos++,
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'sorting' => 'ascending',
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);
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}
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return $definition;
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}
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$query = 'SELECT a.attname
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FROM pg_constraint c
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LEFT JOIN pg_class t ON c.conrelid = t.oid
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LEFT JOIN pg_attribute a ON a.attrelid = t.oid AND a.attnum = ANY(c.conkey)
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WHERE c.conname = %s
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AND t.relname = ' . $db->quote($table, 'text');
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$fields = $db->queryCol(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null);
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if (MDB2::isError($fields)) {
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return $fields;
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}
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$colpos = 1;
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foreach ($fields as $field) {
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$definition['fields'][$field] = array(
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'position' => $colpos++,
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'sorting' => 'ascending',
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);
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}
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if ($definition['foreign']) {
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$query = 'SELECT a.attname
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FROM pg_constraint c
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LEFT JOIN pg_class t ON c.confrelid = t.oid
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LEFT JOIN pg_attribute a ON a.attrelid = t.oid AND a.attnum = ANY(c.confkey)
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WHERE c.conname = %s
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AND t.relname = ' . $db->quote($definition['references']['table'], 'text');
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$foreign_fields = $db->queryCol(sprintf($query, $db->quote($constraint_name_mdb2, 'text')), null);
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if (MDB2::isError($foreign_fields)) {
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return $foreign_fields;
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}
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$colpos = 1;
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foreach ($foreign_fields as $foreign_field) {
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$definition['references']['fields'][$foreign_field] = array(
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'position' => $colpos++,
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);
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}
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}
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if ($definition['check']) {
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$check_def = $db->queryOne("SELECT pg_get_constraintdef(" . $row['oid'] . ", 't')");
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// ...
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}
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return $definition;
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}
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// }}}
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// {{{ getTriggerDefinition()
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/**
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* Get the structure of a trigger into an array
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*
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* EXPERIMENTAL
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*
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* WARNING: this function is experimental and may change the returned value
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* at any time until labelled as non-experimental
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*
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* @param string $trigger name of trigger that should be used in method
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* @return mixed data array on success, a MDB2 error on failure
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* @access public
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*
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* @TODO: add support for plsql functions and functions with args
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*/
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function getTriggerDefinition($trigger)
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{
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$db = $this->getDBInstance();
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if (MDB2::isError($db)) {
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return $db;
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}
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$query = "SELECT trg.tgname AS trigger_name,
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tbl.relname AS table_name,
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CASE
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WHEN p.proname IS NOT NULL THEN 'EXECUTE PROCEDURE ' || p.proname || '();'
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ELSE ''
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END AS trigger_body,
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CASE trg.tgtype & cast(2 as int2)
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WHEN 0 THEN 'AFTER'
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ELSE 'BEFORE'
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END AS trigger_type,
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CASE trg.tgtype & cast(28 as int2)
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WHEN 16 THEN 'UPDATE'
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WHEN 8 THEN 'DELETE'
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WHEN 4 THEN 'INSERT'
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WHEN 20 THEN 'INSERT, UPDATE'
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WHEN 28 THEN 'INSERT, UPDATE, DELETE'
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WHEN 24 THEN 'UPDATE, DELETE'
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WHEN 12 THEN 'INSERT, DELETE'
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END AS trigger_event,
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CASE trg.tgenabled
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WHEN 'O' THEN 't'
|
|
ELSE trg.tgenabled
|
|
END AS trigger_enabled,
|
|
obj_description(trg.oid, 'pg_trigger') AS trigger_comment
|
|
FROM pg_trigger trg,
|
|
pg_class tbl,
|
|
pg_proc p
|
|
WHERE trg.tgrelid = tbl.oid
|
|
AND trg.tgfoid = p.oid
|
|
AND trg.tgname = ". $db->quote($trigger, 'text');
|
|
$types = array(
|
|
'trigger_name' => 'text',
|
|
'table_name' => 'text',
|
|
'trigger_body' => 'text',
|
|
'trigger_type' => 'text',
|
|
'trigger_event' => 'text',
|
|
'trigger_comment' => 'text',
|
|
'trigger_enabled' => 'boolean',
|
|
);
|
|
return $db->queryRow($query, $types, MDB2_FETCHMODE_ASSOC);
|
|
}
|
|
|
|
// }}}
|
|
// {{{ tableInfo()
|
|
|
|
/**
|
|
* Returns information about a table or a result set
|
|
*
|
|
* NOTE: only supports 'table' and 'flags' if <var>$result</var>
|
|
* is a table name.
|
|
*
|
|
* @param object|string $result MDB2_result object from a query or a
|
|
* string containing the name of a table.
|
|
* While this also accepts a query result
|
|
* resource identifier, this behavior is
|
|
* deprecated.
|
|
* @param int $mode a valid tableInfo mode
|
|
*
|
|
* @return array an associative array with the information requested.
|
|
* A MDB2_Error object on failure.
|
|
*
|
|
* @see MDB2_Driver_Common::tableInfo()
|
|
*/
|
|
function tableInfo($result, $mode = null)
|
|
{
|
|
if (is_string($result)) {
|
|
return parent::tableInfo($result, $mode);
|
|
}
|
|
|
|
$db = $this->getDBInstance();
|
|
if (MDB2::isError($db)) {
|
|
return $db;
|
|
}
|
|
|
|
$resource = MDB2::isResultCommon($result) ? $result->getResource() : $result;
|
|
if (!is_resource($resource)) {
|
|
return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA, null, null,
|
|
'Could not generate result resource', __FUNCTION__);
|
|
}
|
|
|
|
if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
|
|
if ($db->options['field_case'] == CASE_LOWER) {
|
|
$case_func = 'strtolower';
|
|
} else {
|
|
$case_func = 'strtoupper';
|
|
}
|
|
} else {
|
|
$case_func = 'strval';
|
|
}
|
|
|
|
$count = @pg_num_fields($resource);
|
|
$res = array();
|
|
|
|
if ($mode) {
|
|
$res['num_fields'] = $count;
|
|
}
|
|
|
|
$db->loadModule('Datatype', null, true);
|
|
for ($i = 0; $i < $count; $i++) {
|
|
$res[$i] = array(
|
|
'table' => function_exists('pg_field_table') ? @pg_field_table($resource, $i) : '',
|
|
'name' => $case_func(@pg_field_name($resource, $i)),
|
|
'type' => @pg_field_type($resource, $i),
|
|
'length' => @pg_field_size($resource, $i),
|
|
'flags' => '',
|
|
);
|
|
$mdb2type_info = $db->datatype->mapNativeDatatype($res[$i]);
|
|
if (MDB2::isError($mdb2type_info)) {
|
|
return $mdb2type_info;
|
|
}
|
|
$res[$i]['mdb2type'] = $mdb2type_info[0][0];
|
|
if ($mode & MDB2_TABLEINFO_ORDER) {
|
|
$res['order'][$res[$i]['name']] = $i;
|
|
}
|
|
if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
|
|
$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
|
|
}
|
|
}
|
|
|
|
return $res;
|
|
}
|
|
}
|
|
?>
|