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270 lines
10 KiB
PHP
270 lines
10 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, Frank M. Kromann |
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// | All rights reserved. |
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// +----------------------------------------------------------------------+
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// | MDB2 is a merge of PEAR DB and Metabases that provides a unified DB |
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// | API as well as database abstraction for PHP applications. |
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// | This LICENSE is in the BSD license style. |
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// | |
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// | Redistribution and use in source and binary forms, with or without |
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// | modification, are permitted provided that the following conditions |
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// | are met: |
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// | |
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// | Redistributions of source code must retain the above copyright |
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// | notice, this list of conditions and the following disclaimer. |
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// | |
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// | Redistributions in binary form must reproduce the above copyright |
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// | notice, this list of conditions and the following disclaimer in the |
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// | documentation and/or other materials provided with the distribution. |
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// | |
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// | Neither the name of Manuel Lemos, Tomas V.V.Cox, Stig. S. Bakken, |
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// | Lukas Smith nor the names of his contributors may be used to endorse |
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// | or promote products derived from this software without specific prior|
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// | written permission. |
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// | |
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// | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
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// | "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
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// | LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
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// | FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
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// | REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
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// | INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
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// | BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS|
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// | OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
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// | AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
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// | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY|
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// | WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
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// | POSSIBILITY OF SUCH DAMAGE. |
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// +----------------------------------------------------------------------+
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// | Author: Lukas Smith <smith@pooteeweet.org> |
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// +----------------------------------------------------------------------+
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//
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// $Id$
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//
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require_once 'MDB2/Driver/Reverse/Common.php';
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/**
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* MDB2 MSSQL 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 Lukas Smith <smith@dybnet.de>
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*/
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class MDB2_Driver_Reverse_mssql extends MDB2_Driver_Reverse_Common
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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 = $db->_doQuery("SELECT TOP 0 * FROM [$result]");
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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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$count = @mssql_num_fields($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' => $case_func(@mssql_field_name($id, $i)),
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'type' => @mssql_field_type($id, $i),
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'len' => @mssql_field_length($id, $i),
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// We only support flags for table
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'flags' => $got_string
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? $this->_mssql_field_flags($result, @mssql_field_name($id, $i)) : '',
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);
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if ($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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@mssql_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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// {{{ _mssql_field_flags()
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/**
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* Get a column's flags
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*
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* Supports "not_null", "primary_key",
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* "auto_increment" (mssql identity), "timestamp" (mssql timestamp),
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* "unique_key" (mssql unique index, unique check or primary_key) and
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* "multiple_key" (multikey index)
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*
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* mssql timestamp is NOT similar to the mysql timestamp so this is maybe
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* not useful at all - is the behaviour of mysql_field_flags that primary
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* keys are alway unique? is the interpretation of multiple_key correct?
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*
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* @param string $table the table name
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* @param string $column the field name
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*
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* @return string the flags
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*
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* @access protected
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* @author Joern Barthel <j_barthel@web.de>
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*/
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function _mssql_field_flags($table, $column)
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{
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$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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static $tableName = null;
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static $flags = array();
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if ($table != $tableName) {
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$flags = array();
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$tableName = $table;
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// get unique and primary keys
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$res = $db->queryAll("EXEC SP_HELPINDEX[$table]", null, MDB2_FETCHMODE_ASSOC);
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foreach ($res as $val) {
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$keys = explode(', ', $val['index_keys']);
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if (sizeof($keys) > 1) {
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foreach ($keys as $key) {
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$this->_add_flag($flags[$key], 'multiple_key');
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}
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}
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if (strpos($val['index_description'], 'primary key')) {
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foreach ($keys as $key) {
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$this->_add_flag($flags[$key], 'primary_key');
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}
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} elseif (strpos($val['index_description'], 'unique')) {
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foreach ($keys as $key) {
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$this->_add_flag($flags[$key], 'unique_key');
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}
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}
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}
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// get auto_increment, not_null and timestamp
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$res = $db->queryAll("EXEC SP_COLUMNS[$table]", null, MDB2_FETCHMODE_ASSOC);
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foreach ($res as $val) {
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$val = array_change_key_case($val, $db->options['field_case']);
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if ($val['nullable'] == '0') {
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$this->_add_flag($flags[$val['column_name']], 'not_null');
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}
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if (strpos($val['type_name'], 'identity')) {
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$this->_add_flag($flags[$val['column_name']], 'auto_increment');
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}
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if (strpos($val['type_name'], 'timestamp')) {
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$this->_add_flag($flags[$val['column_name']], 'timestamp');
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}
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}
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}
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if (array_key_exists($column, $flags)) {
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return(implode(' ', $flags[$column]));
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}
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return '';
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}
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// }}}
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// {{{ _add_flag()
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/**
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* Adds a string to the flags array if the flag is not yet in there
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* - if there is no flag present the array is created
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*
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* @param array &$array the reference to the flag-array
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* @param string $value the flag value
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*
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* @return void
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*
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* @access protected
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* @author Joern Barthel <j_barthel@web.de>
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*/
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function _add_flag(&$array, $value)
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{
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if (!is_array($array)) {
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$array = array($value);
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} elseif (!in_array($value, $array)) {
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array_push($array, $value);
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}
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}
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}
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?>
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