<?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/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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*/
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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 stucture of a field into an array
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*
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* @param string $table 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, $field_name)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$result = $db->loadModule('Datatype');
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if (PEAR::isError($result)) {
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return $result;
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}
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$column = $db->queryRow("SELECT
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attnum,attname,typname,attlen,attnotnull,
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atttypmod,usename,usesysid,pg_class.oid,relpages,
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reltuples,relhaspkey,relhasrules,relacl,adsrc
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FROM pg_class,pg_user,pg_type,
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pg_attribute left outer join pg_attrdef on
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pg_attribute.attrelid=pg_attrdef.adrelid
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WHERE (pg_class.relname='$table')
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and (pg_class.oid=pg_attribute.attrelid)
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and (pg_class.relowner=pg_user.usesysid)
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and (pg_attribute.atttypid=pg_type.oid)
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and attnum > 0
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and attname = '$field_name'
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ORDER BY attnum
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", null, MDB2_FETCHMODE_ASSOC);
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if (PEAR::isError($column)) {
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return $column;
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}
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list($types, $length) = $db->datatype->mapNativeDatatype($column);
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$notnull = false;
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if (array_key_exists('attnotnull', $column) && $column['attnotnull'] == 't') {
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$notnull = true;
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}
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$default = false;
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// todo .. check how default look like
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if (!preg_match("/nextval\('([^']+)'/", $column['adsrc'])
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&& strlen($column['adsrc']) > 2
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) {
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$default = substr($column['adsrc'], 1, -1);
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if (is_null($default) && $notnull) {
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$default = '';
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}
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}
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$autoincrement = false;
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if (preg_match("/nextval\('([^']+)'/", $column['adsrc'], $nextvals)) {
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$autoincrement = true;
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}
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$definition = array();
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foreach ($types as $key => $type) {
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$definition[$key] = array(
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'type' => $type,
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'notnull' => $notnull,
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);
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if ($length > 0) {
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$definition[$key]['length'] = $length;
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}
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if ($default !== false) {
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$definition[$key]['default'] = $default;
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}
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if ($autoincrement !== false) {
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$definition[$key]['autoincrement'] = $autoincrement;
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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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// {{{ getTableIndexDefinition()
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/**
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* get the stucture of an index into an array
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*
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* @param string $table 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, $index_name)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$query = "SELECT * FROM pg_index, pg_class
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WHERE (pg_class.relname='$index_name') AND (pg_class.oid=pg_index.indexrelid)";
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$row = $db->queryRow($query, null, MDB2_FETCHMODE_ASSOC);
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if (PEAR::isError($row)) {
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return $row;
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}
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if ($row['relname'] != $index_name) {
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return $db->raiseError(MDB2_ERROR, null, null,
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'getTableIndexDefinition: it was not specified an existing table index');
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}
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$db->loadModule('Manager');
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$columns = $db->manager->listTableFields($table);
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$definition = array();
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if ($row['indisunique'] == 't') {
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$definition['unique'] = true;
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}
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$index_column_numbers = explode(' ', $row['indkey']);
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foreach ($index_column_numbers as $number) {
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$definition['fields'][$columns[($number - 1)]] = array('sorting' => 'ascending');
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}
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return $definition;
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}
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// }}}
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// {{{ tableInfo()
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/**
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* Returns information about a table or a result set
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*
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* NOTE: only supports 'table' and 'flags' if <var>$result</var>
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* is a table name.
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*
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* @param object|string $result MDB2_result object from a query or a
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* string containing the name of a table.
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* While this also accepts a query result
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* resource identifier, this behavior is
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* deprecated.
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* @param int $mode a valid tableInfo mode
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*
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* @return array an associative array with the information requested.
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* A MDB2_Error object on failure.
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*
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* @see MDB2_Driver_Common::tableInfo()
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*/
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function tableInfo($result, $mode = null)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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if (is_string($result)) {
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/*
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* Probably received a table name.
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* Create a result resource identifier.
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*/
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$id = $db->_doQuery("SELECT * FROM $result LIMIT 0");
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if (PEAR::isError($id)) {
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return $id;
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}
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$got_string = true;
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} elseif (MDB2::isResultCommon($result)) {
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/*
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* Probably received a result object.
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* Extract the result resource identifier.
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*/
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$id = $result->getResource();
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$got_string = false;
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} else {
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/*
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* Probably received a result resource identifier.
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* Copy it.
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* Deprecated. Here for compatibility only.
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*/
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$id = $result;
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$got_string = false;
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}
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if (!is_resource($id)) {
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return $db->raiseError(MDB2_ERROR_NEED_MORE_DATA);
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}
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if ($db->options['portability'] & MDB2_PORTABILITY_FIX_CASE) {
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if ($db->options['field_case'] == CASE_LOWER) {
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$case_func = 'strtolower';
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} else {
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$case_func = 'strtoupper';
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}
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} else {
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$case_func = 'strval';
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}
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$count = @pg_num_fields($id);
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$res = array();
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if ($mode) {
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$res['num_fields'] = $count;
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}
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for ($i = 0; $i < $count; $i++) {
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$res[$i] = array(
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'table' => $got_string ? $case_func($result) : '',
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'name' => $case_func(@pg_field_name($id, $i)),
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'type' => @pg_field_type($id, $i),
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'len' => @pg_field_size($id, $i),
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'flags' => $got_string
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? $this->_pgFieldFlags($id, $i, $result)
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: '',
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);
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if ($mode & MDB2_TABLEINFO_ORDER) {
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$res['order'][$res[$i]['name']] = $i;
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}
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if ($mode & MDB2_TABLEINFO_ORDERTABLE) {
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$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
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}
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}
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// free the result only if we were called on a table
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if ($got_string) {
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@pg_free_result($id);
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}
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return $res;
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}
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// }}}
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// {{{ _pgFieldFlags()
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/**
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* Get a column's flags
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*
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* Supports "not_null", "default_value", "primary_key", "unique_key"
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* and "multiple_key". The default value is passed through
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* rawurlencode() in case there are spaces in it.
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*
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* @param int $resource the PostgreSQL result identifier
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* @param int $num_field the field number
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*
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* @return string the flags
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*
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* @access protected
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*/
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function _pgFieldFlags($resource, $num_field, $table_name)
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{
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$db =& $this->getDBInstance();
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if (PEAR::isError($db)) {
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return $db;
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}
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$field_name = @pg_field_name($resource, $num_field);
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$result = @pg_query($db->connection, "SELECT f.attnotnull, f.atthasdef
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FROM pg_attribute f, pg_class tab, pg_type typ
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WHERE tab.relname = typ.typname
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AND typ.typrelid = f.attrelid
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AND f.attname = '$field_name'
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AND tab.relname = '$table_name'");
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if (@pg_num_rows($result) > 0) {
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$row = @pg_fetch_row($result, 0);
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$flags = ($row[0] == 't') ? 'not_null ' : '';
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if ($row[1] == 't') {
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$result = @pg_query($db->connection, "SELECT a.adsrc
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FROM pg_attribute f, pg_class tab, pg_type typ, pg_attrdef a
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WHERE tab.relname = typ.typname AND typ.typrelid = f.attrelid
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AND f.attrelid = a.adrelid AND f.attname = '$field_name'
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AND tab.relname = '$table_name' AND f.attnum = a.adnum");
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$row = @pg_fetch_row($result, 0);
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$num = preg_replace("/'(.*)'::\w+/", "\\1", $row[0]);
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$flags.= 'default_' . rawurlencode($num) . ' ';
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}
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} else {
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$flags = '';
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}
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$result = @pg_query($db->connection, "SELECT i.indisunique, i.indisprimary, i.indkey
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FROM pg_attribute f, pg_class tab, pg_type typ, pg_index i
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WHERE tab.relname = typ.typname
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AND typ.typrelid = f.attrelid
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AND f.attrelid = i.indrelid
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AND f.attname = '$field_name'
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AND tab.relname = '$table_name'");
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$count = @pg_num_rows($result);
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for ($i = 0; $i < $count ; $i++) {
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$row = @pg_fetch_row($result, $i);
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$keys = explode(' ', $row[2]);
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if (in_array($num_field + 1, $keys)) {
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$flags.= ($row[0] == 't' && $row[1] == 'f') ? 'unique_key ' : '';
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$flags.= ($row[1] == 't') ? 'primary_key ' : '';
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if (count($keys) > 1)
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$flags.= 'multiple_key ';
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}
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}
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return trim($flags);
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}
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}
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?>
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