egroupware_official/phpgwapi/inc/class.db_mssql.inc.php
2001-07-08 04:17:28 +00:00

277 lines
6.4 KiB
PHP

<?php
/**************************************************************************\
* phpGroupWare API - MS SQL Server support *
* (C) Copyright 1998 Cameron Taggart (cameront@wolfenet.com) *
* Modified by Guarneri carmelo (carmelo@melting-soft.com) *
* Modified by Cameron Just (C.Just@its.uq.edu.au) *
* ------------------------------------------------------------------------ *
* This is not part of phpGroupWare, but is used by phpGroupWare. *
* http://www.phpgroupware.org/ *
* ------------------------------------------------------------------------ *
* This program is free software; you can redistribute it and/or modify it *
* under the terms of the GNU Lesser General Public License as published *
* by the Free Software Foundation; either version 2.1 of the License, or *
* any later version. *
\**************************************************************************/
/* $Id$ */
# echo "<BR>This is using the MSSQL class<BR>";
class db {
var $Host = '';
var $Database = '';
var $User = '';
var $Password = '';
var $Link_ID = 0;
var $Query_ID = 0;
var $Record = array();
var $Row = 0;
var $VEOF = -1;
var $Errno = 0;
var $Error = '';
var $use_pconnect = True;
var $Auto_Free = 0; ## set this to 1 to automatically free results
function connect()
{
if ( 0 == $this->Link_ID )
{
if ($this->use_pconnect)
$this->Link_ID=mssql_pconnect($this->Host, $this->User, $this->Password);
else
$this->Link_ID=mssql_connect($this->Host, $this->User, $this->Password);
if (!$this->Link_ID)
$this->halt("Link-ID == false, mssql_pconnect failed");
else
mssql_select_db($this->Database, $this->Link_ID);
}
}
function free_result()
{
mssql_free_result($this->Query_ID);
$this->Query_ID = 0;
$this->VEOF = -1;
}
function query($Query_String, $line = '', $file = '')
{
$this->VEOF = -1;
if (!$this->Link_ID)
$this->connect();
$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
$this->Row = 0;
if (!$this->Query_ID) {
$this->halt("Invalid SQL: " . $Query_String, $line, $file);
}
return $this->Query_ID;
}
// public: perform a query with limited result set
function limit_query($Query_String, $offset, $line = '', $file = '', $num_rows = '')
{
global $phpgw_info;
if (! $num_rows)
{
$num_rows = $phpgw_info['user']['preferences']['common']['maxmatchs'];
}
if ($this->Debug)
{
printf("Debug: limit_query = %s<br>offset=%d, num_rows=%d<br>\n", $Query_String, $offset, $num_rows);
}
$this->query($Query_String, $line, $file);
if ($this->Query_ID)
{
$this->Row = $offset;
// Push cursor to appropriate row in case next_record() is used
if ($offset > 0)
@mssql_data_seek($this->Query_ID, $offset);
$this->VEOF = $offset + $num_rows - 1;
}
return $this->Query_ID;
}
function next_record()
{
if (!$this->Query_ID)
{
$this->halt("next_record called with no query pending.");
return 0;
}
if ($this->VEOF == -1 || ($this->Row++ <= $this->VEOF))
{
// Work around for buggy mssql_fetch_array
$rec = @mssql_fetch_row($this->Query_ID);
if ($rec)
{
$this->Record = array();
for (var $i = 0; $i < count($rec); $i++)
{
$this->Record[$i] = $rec[$i];
$o = mssql_fetch_field($i, $this->Query_ID);
$this->Record[$o->name] = $rec[$i];
}
}
else
$this->Record = NULL;
}
else
$this->Record = NULL;
$stat = is_array($this->Record);
if (!$stat && $this->Auto_Free)
$this->free();
return $stat;
}
function transaction_begin()
{
return $this->query('BEGIN TRAN');
}
function transaction_commit()
{
if (!$this->Errno)
return $this->query('COMMIT TRAN');
return False;
}
function transaction_abort()
{
return $this->query('ROLLBACK TRAN');
}
function seek($pos) {
mssql_data_seek($this->Query_ID,$pos);
$this->Row = $pos;
}
function metadata($table) {
$count = 0;
$id = 0;
$res = array();
$this->connect();
$id = mssql_query("select * from $table", $this->Link_ID);
if (!$id)
$this->halt("Metadata query failed.");
$count = mssql_num_fields($id);
for ($i=0; $i<$count; $i++) {
$info = mssql_fetch_field($id, $i);
$res[$i]["table"] = $table;
$res[$i]["name"] = $info["name"];
$res[$i]["len"] = $info["max_length"];
$res[$i]["flags"] = $info["numeric"];
}
$this->free_result();
return $res;
}
function affected_rows() {
return mssql_affected_rows($this->Query_ID);
}
function num_rows() {
return mssql_num_rows($this->Query_ID);
}
function num_fields() {
return mssql_num_fields($this->Query_ID);
}
function nf() {
return $this->num_rows();
}
function np() {
print $this->num_rows();
}
function f($Field_Name) {
return $this->Record[strtolower($Field_Name)];
}
function p($Field_Name) {
print $this->f($Field_Name);
}
/* public: table locking */
function lock($table, $mode="write")
{
return 1; // FIXME: fill it in!
}
function unlock()
{
return 1; // FIXME: fill it in!
}
/* private: error handling */
function halt($msg, $line = '', $file = '')
{
global $phpgw;
$this->unlock();
$this->Errno = 1;
$this->Error = mssql_get_last_message();
if ($this->Error == '')
$this->Error = "General Error (The MS-SQL interface did not return a detailed error message).";
if ($this->Halt_On_Error == "no")
return;
$this->haltmsg($msg);
if ($file)
printf("<br><b>File:</b> %s",$file);
if ($line)
printf("<br><b>Line:</b> %s",$line);
if ($this->Halt_On_Error != "report")
{
echo "<p><b>Session halted.</b>";
$phpgw->common->phpgw_exit(True);
}
}
function haltmsg($msg)
{
printf("<b>Database error:</b> %s<br>\n", $msg);
if ($this->Errno != "0" && $this->Error != "()") {
printf("<b>MS-SQL Error</b>: %s (%s)<br>\n", $this->Errno, $this->Error);
}
}
function table_names()
{
$this->query("select name from sysobjects where type='u' and name != 'dtproperties'");
$i = 0;
while ($info = @mssql_fetch_row($this->Query_ID))
{
$return[$i]['table_name'] = $info[0];
$return[$i]['tablespace_name'] = $this->Database;
$return[$i]['database'] = $this->Database;
$i++;
}
return $return;
}
}
?>