egroupware_official/phpgwapi/inc/class.db_mssql.inc.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 $Errno    = 0;
	var $Error    = "";

	var $Auto_Free = 0;     ## set this to 1 to automatically free results


	function connect() {
		if ( 0 == $this->Link_ID ) {
			$this->Link_ID=mssql_pconnect($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;
	}

	function query($Query_String) {
		if (!$this->Link_ID)
			$this->connect();

#   printf("<br>Debug: query = %s<br>\n", $Query_String);

		$this->Query_ID = mssql_query($Query_String, $this->Link_ID);
		$this->Row = 0;
		if (!$this->Query_ID) {
			$this->Errno = 1;
			$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
			$this->halt("Invalid SQL: ".$Query_String);
		}
		return $this->Query_ID;
	}

	function next_record() {

		if ($this->Record = mssql_fetch_row($this->Query_ID)) {
      // add to Record[<key>]
			$count = mssql_num_fields($this->Query_ID);
			for ($i=0; $i<$count; $i++){
				$fieldinfo = mssql_fetch_field($this->Query_ID,$i);
				$this->Record[strtolower($fieldinfo->name)] = $this->Record[$i];
			}
			$this->Row += 1;
			$stat = 1;
		} else {
			if ($this->Auto_Free) {
				$this->free_result();
			}
			$stat = 0;
		}
		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->Errno = 1;
			$this->Error = "General Error (The MSSQL interface cannot return detailed error messages).";
			$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);
	}

	function halt($msg) {
		printf("<b>Database error:</b> %s<br>\n", $msg);
		printf("<b>MSSQL Error</b>: %s (%s)<br>\n",
			$this->Errno,
			$this->Error);
		die("Session halted.");
	}

	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;
	}	
}
?>