mirror of
https://gitlab.com/harald.mueller/aktuelle.kurse.git
synced 2024-10-19 18:05:02 +02:00
500 lines
15 KiB
PHP
500 lines
15 KiB
PHP
<?php
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//
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// +----------------------------------------------------------------------+
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// | PHP Version 4 |
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// +----------------------------------------------------------------------+
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// | Copyright (c) 1997-2002 The PHP Group |
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// +----------------------------------------------------------------------+
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// | This source file is subject to version 2.02 of the PHP license, |
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// | that is bundled with this package in the file LICENSE, and is |
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// | available at through the world-wide-web at |
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// | http://www.php.net/license/2_02.txt. |
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// | If you did not receive a copy of the PHP license and are unable to |
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// | obtain it through the world-wide-web, please send a note to |
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// | license@php.net so we can mail you a copy immediately. |
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// +----------------------------------------------------------------------+
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// | Author: Sterling Hughes <sterling@php.net> |
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// +----------------------------------------------------------------------+
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//
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// $Id: mssql.php,v 1.40 2002/02/28 08:27:10 sebastian Exp $
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//
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// Database independent query interface definition for PHP's Microsoft SQL Server
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// extension.
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//
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require_once 'DB/common.php';
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class DB_mssql extends DB_common
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{
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var $connection;
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var $phptype, $dbsyntax;
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var $prepare_tokens = array();
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var $prepare_types = array();
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var $transaction_opcount = 0;
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var $autocommit = true;
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function DB_mssql()
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{
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$this->DB_common();
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$this->phptype = 'mssql';
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$this->dbsyntax = 'mssql';
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$this->features = array(
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'prepare' => false,
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'pconnect' => true,
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'transactions' => true,
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'limit' => 'emulate'
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);
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// XXX Add here error codes ie: 'S100E' => DB_ERROR_SYNTAX
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$this->errorcode_map = array(
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);
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}
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function connect($dsninfo, $persistent = false)
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{
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if (!DB::assertExtension('mssql') && !DB::assertExtension('sybase')
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&& !DB::assertExtension('sybase_ct'))
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{
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return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
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}
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$this->dsn = $dsninfo;
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$user = $dsninfo['username'];
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$pw = $dsninfo['password'];
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$dbhost = $dsninfo['hostspec'] ? $dsninfo['hostspec'] : 'localhost';
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$connect_function = $persistent ? 'mssql_pconnect' : 'mssql_connect';
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if ($dbhost && $user && $pw) {
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$conn = @$connect_function($dbhost, $user, $pw);
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} elseif ($dbhost && $user) {
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$conn = @$connect_function($dbhost, $user);
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} else {
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$conn = @$connect_function($dbhost);
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}
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if (!$conn) {
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return $this->raiseError(DB_ERROR_CONNECT_FAILED, null, null,
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null, mssql_get_last_message());
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}
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if ($dsninfo['database']) {
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if (!@mssql_select_db($dsninfo['database'], $conn)) {
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return $this->raiseError(DB_ERROR_NODBSELECTED, null, null,
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null, mssql_get_last_message());
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}
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}
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$this->connection = $conn;
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return DB_OK;
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}
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function disconnect()
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{
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$ret = @mssql_close($this->connection);
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$this->connection = null;
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return $ret;
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}
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function simpleQuery($query)
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{
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$ismanip = DB::isManip($query);
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$this->last_query = $query;
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$query = $this->modifyQuery($query);
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if (!$this->autocommit && $ismanip) {
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if ($this->transaction_opcount == 0) {
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$result = @mssql_query('BEGIN TRAN', $this->connection);
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if (!$result) {
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return $this->mssqlRaiseError();
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}
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}
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$this->transaction_opcount++;
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}
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$result = @mssql_query($query, $this->connection);
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if (!$result) {
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return $this->mssqlRaiseError();
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}
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// Determine which queries that should return data, and which
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// should return an error code only.
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return $ismanip ? DB_OK : $result;
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}
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// {{{ nextResult()
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/**
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* Move the internal mssql result pointer to the next available result
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*
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* @param a valid fbsql result resource
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*
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* @access public
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*
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* @return true if a result is available otherwise return false
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*/
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function nextResult($result)
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{
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return mssql_next_result($result);
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}
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// }}}
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function &fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=null)
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{
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if ($fetchmode == DB_FETCHMODE_DEFAULT) {
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$fetchmode = $this->fetchmode;
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}
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$res = $this->fetchInto ($result, $arr, $fetchmode, $rownum);
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if ($res !== DB_OK) {
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return $res;
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}
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return $arr;
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}
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function fetchInto($result, &$ar, $fetchmode, $rownum=null)
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{
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if ($rownum !== null) {
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if (!@mssql_data_seek($result, $rownum)) {
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return null;
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}
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}
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if ($fetchmode & DB_FETCHMODE_ASSOC) {
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$ar = @mssql_fetch_array($result);
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} else {
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$ar = @mssql_fetch_row($result);
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}
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if (!$ar) {
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/* This throws informative error messages,
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don't use it for now
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if ($msg = mssql_get_last_message()) {
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return $this->raiseError($msg);
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}
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*/
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return null;
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}
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return DB_OK;
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}
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function freeResult($result)
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{
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if (is_resource($result)) {
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return @mssql_free_result($result);
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}
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if (!isset($this->prepare_tokens[$result])) {
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return false;
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}
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unset($this->prepare_tokens[$result]);
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unset($this->prepare_types[$result]);
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return true;
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}
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function numCols($result)
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{
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$cols = @mssql_num_fields($result);
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if (!$cols) {
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return $this->mssqlRaiseError();
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}
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return $cols;
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}
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function numRows($result)
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{
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$rows = @mssql_num_rows($result);
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if ($rows === false) {
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return $this->mssqlRaiseError();
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}
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return $rows;
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}
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/**
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* Enable/disable automatic commits
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*/
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function autoCommit($onoff = false)
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{
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// XXX if $this->transaction_opcount > 0, we should probably
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// issue a warning here.
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$this->autocommit = $onoff ? true : false;
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return DB_OK;
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}
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// }}}
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// {{{ commit()
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/**
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* Commit the current transaction.
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*/
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function commit()
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{
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if ($this->transaction_opcount > 0) {
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$result = @mssql_query('COMMIT TRAN', $this->connection);
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$this->transaction_opcount = 0;
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if (!$result) {
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return $this->mssqlRaiseError();
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}
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}
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return DB_OK;
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}
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// }}}
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// {{{ rollback()
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/**
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* Roll back (undo) the current transaction.
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*/
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function rollback()
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{
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if ($this->transaction_opcount > 0) {
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$result = @mssql_query('ROLLBACK TRAN', $this->connection);
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$this->transaction_opcount = 0;
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if (!$result) {
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return $this->mssqlRaiseError();
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}
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}
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return DB_OK;
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}
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// }}}
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// {{{ affectedRows()
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/**
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* Gets the number of rows affected by the last query.
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* if the last query was a select, returns 0.
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*
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* @return number of rows affected by the last query or DB_ERROR
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*/
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function affectedRows()
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{
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if (DB::isManip($this->last_query)) {
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$res = @mssql_query('select @@rowcount', $this->connection);
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if (!$res) {
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return $this->mssqlRaiseError();
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}
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$ar = @mssql_fetch_row($res);
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if (!$ar) {
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$result = 0;
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} else {
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@mssql_free_result($res);
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$result = $ar[0];
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}
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} else {
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$result = 0;
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}
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return $result;
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}
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// {{{ nextId()
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/**
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* Get the next value in a sequence. We emulate sequences
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* for MSSQL. Will create the sequence if it does not exist.
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*
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* @access public
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*
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* @param $seq_name the name of the sequence
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*
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* @param $ondemand whether to create the sequence table on demand
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* (default is true)
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*
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* @return a sequence integer, or a DB error
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*/
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function nextId($seq_name, $ondemand = true)
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{
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$seqname = $this->getSequenceName($seq_name);
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$repeat = 0;
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do {
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$this->pushErrorHandling(PEAR_ERROR_RETURN);
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$result = $this->query("INSERT INTO $seqname (vapor) VALUES (0)");
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$this->popErrorHandling();
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if ($ondemand && DB::isError($result) &&
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($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE))
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{
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$repeat = 1;
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$result = $this->createSequence($seq_name);
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if (DB::isError($result)) {
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return $result;
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}
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} else {
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$result = $this->query("SELECT @@IDENTITY FROM $seqname");
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$repeat = 0;
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}
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} while ($repeat);
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if (DB::isError($result)) {
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return $this->raiseError($result);
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}
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$result = $result->fetchRow(DB_FETCHMODE_ORDERED);
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return $result[0];
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}
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// }}}
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// {{{ createSequence()
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function createSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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return $this->query("CREATE TABLE $seqname ".
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'([id] [int] IDENTITY (1, 1) NOT NULL ,' .
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'[vapor] [int] NULL)');
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}
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// }}}
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// {{{ dropSequence()
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function dropSequence($seq_name)
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{
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$seqname = $this->getSequenceName($seq_name);
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return $this->query("DROP TABLE $seqname");
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}
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// }}}
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function errorCode()
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{
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$this->pushErrorHandling(PEAR_ERROR_RETURN);
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$error_code = $this->getOne('select @@ERROR as ErrorCode');
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$this->popErrorHandling();
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// XXX Debug
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if (!isset($this->errorcode_map[$error_code])) {
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return DB_ERROR;
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}
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return $error_code;
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}
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function mssqlRaiseError($code = null)
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{
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if ($code !== null) {
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$code = $this->errorCode();
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if (DB::isError($code)) {
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return $this->raiseError($code);
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}
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}
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return $this->raiseError($code, null, null, null,
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mssql_get_last_message());
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}
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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: doesn't support table name and flags if called from a db_result
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*
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* @param mixed $resource SQL Server result identifier or table name
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* @param int $mode A valid tableInfo mode (DB_TABLEINFO_ORDERTABLE or
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* DB_TABLEINFO_ORDER)
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*
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* @return array An array with all the information
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*/
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function tableInfo($result, $mode = null)
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{
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$count = 0;
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$id = 0;
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$res = array();
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/*
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* depending on $mode, metadata returns the following values:
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*
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* - mode is false (default):
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* $result[]:
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags
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*
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* - mode is DB_TABLEINFO_ORDER
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* $result[]:
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* ["num_fields"] number of metadata records
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* [0]["table"] table name
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* [0]["name"] field name
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* [0]["type"] field type
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* [0]["len"] field length
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* [0]["flags"] field flags
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* ["order"][field name] index of field named "field name"
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* The last one is used, if you have a field name, but no index.
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* Test: if (isset($result['meta']['myfield'])) { ...
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*
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* - mode is DB_TABLEINFO_ORDERTABLE
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* the same as above. but additionally
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* ["ordertable"][table name][field name] index of field
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* named "field name"
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*
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* this is, because if you have fields from different
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* tables with the same field name * they override each
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* other with DB_TABLEINFO_ORDER
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*
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* you can combine DB_TABLEINFO_ORDER and
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* DB_TABLEINFO_ORDERTABLE with DB_TABLEINFO_ORDER |
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* DB_TABLEINFO_ORDERTABLE * or with DB_TABLEINFO_FULL
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*/
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// if $result is a string, then we want information about a
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// table without a resultset
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if (is_string($result)) {
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$id = mssql_query("SELECT * FROM $result", $this->connection);
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if (empty($id)) {
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return $this->mssqlRaiseError();
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}
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} else { // else we want information about a resultset
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$id = $result;
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if (empty($id)) {
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return $this->mssqlRaiseError();
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}
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}
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$count = @mssql_num_fields($id);
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// made this IF due to performance (one if is faster than $count if's)
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if (empty($mode)) {
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for ($i=0; $i<$count; $i++) {
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$res[$i]['table'] = (is_string($result)) ? $result : '';
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$res[$i]['name'] = @mssql_field_name($id, $i);
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$res[$i]['type'] = @mssql_field_type($id, $i);
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$res[$i]['len'] = @mssql_field_length($id, $i);
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$res[$i]['flags'] = '';
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}
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} else { // full
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$res['num_fields']= $count;
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for ($i=0; $i<$count; $i++) {
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$res[$i]['table'] = (is_string($result)) ? $result : '';
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$res[$i]['name'] = @mssql_field_name($id, $i);
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$res[$i]['type'] = @mssql_field_type($id, $i);
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$res[$i]['len'] = @mssql_field_length($id, $i);
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$res[$i]['flags'] = '';
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if ($mode & DB_TABLEINFO_ORDER) {
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$res['order'][$res[$i]['name']] = $i;
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}
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if ($mode & DB_TABLEINFO_ORDERTABLE) {
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$res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
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}
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}
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}
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// free the result only if we were called on a table
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if (is_string($result)) {
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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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// {{{ getSpecialQuery()
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/**
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* Returns the query needed to get some backend info
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* @param string $type What kind of info you want to retrieve
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* @return string The SQL query string
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*/
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function getSpecialQuery($type)
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{
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switch ($type) {
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case 'tables':
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$sql = "select name from sysobjects where type = 'U' order by name";
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break;
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case 'views':
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$sql = "select name from sysobjects where type = 'V'";
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break;
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default:
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return null;
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}
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return $sql;
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}
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// }}}
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}
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?>
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