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<?php
/***************************************************************************
* mssql.php
* -------------------
* begin : Saturday, Feb 13, 2001
* copyright : (C) 2001 The phpBB Group
* email : supportphpbb.com
*
* $Id: mssql.php,v 1.22.2.2 2002/12/21 18:31:53 psotfx Exp $
*
***************************************************************************/
/***************************************************************************
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
***************************************************************************/
if(!defined("SQL_LAYER"))
{
define("SQL_LAYER","mssql");
class sql_db
{
var $db_connect_id;
var $result;
var $next_id;
var $in_transaction = 0;
var $row = array();
var $rowset = array();
var $limit_offset;
var $query_limit_success;
var $num_queries = 0;
//
// Constructor
//
function sql_db($sqlserver, $sqluser, $sqlpassword, $database, $persistency = true)
{
$this->persistency = $persistency;
$this->user = $sqluser;
$this->password = $sqlpassword;
$this->server = $sqlserver;
$this->dbname = $database;
$this->db_connect_id = ( $this->persistency ) ? @mssql_pconnect($this->server, $this->user, $this->password) : @mssql_connect($this->server, $this->user, $this->password);
if( $this->db_connect_id && $this->dbname != "" )
{
if( !mssql_select_db($this->dbname, $this->db_connect_id) )
{
mssql_close($this->db_connect_id);
return false;
}
}
return $this->db_connect_id;
}
//
// Other base methods
//
function sql_close()
{
if($this->db_connect_id)
{
//
// Commit any remaining transactions
//
if( $this->in_transaction )
{
@mssql_query("COMMIT", $this->db_connect_id);
}
return @mssql_close($this->db_connect_id);
}
else
{
return false;
}
}
//
// Query method
//
function sql_query($query = '', $transaction = FALSE)
{
//
// Remove any pre-existing queries
//
unset($this->result);
unset($this->row);
if ( $query != '' )
{
$this->num_queries++;
if ( $transaction == BEGIN_TRANSACTION && !$this->in_transaction )
{
if ( !@mssql_query('BEGIN TRANSACTION', $this->db_connect_id) )
{
return false;
}
$this->in_transaction = TRUE;
}
//
// Does query contain any LIMIT code? If so pull out relevant start and num_results
// This isn't terribly easy with MSSQL, whatever you do will potentially impact
// performance compared to an 'in-built' limit
//
// Another issue is the 'lack' of a returned true value when a query is valid but has
// no result set (as with all the other DB interfaces). It seems though that it's
// 'fair' to say that if a query returns a false result (ie. no resource id) then the
// SQL was valid but had no result set. If the query returns nothing but the rowcount
// returns something then there's a problem. This may well be a false assumption though
// ... needs checking under Windows itself.
//
if( preg_match('#^SELECT(.*?)(LIMIT ([0-9]+)[, ]*([0-9]+)*)?$#s', $query, $limits) )
{
$query = $limits[1];
if( !empty($limits[2]) )
{
$row_offset = ( $limits[4] ) ? $limits[3] : "";
$num_rows = ( $limits[4] ) ? $limits[4] : $limits[3];
$query = 'TOP ' . ( $row_offset + $num_rows ) . $query;
}
$this->result = @mssql_query("SELECT $query", $this->db_connect_id);
if( $this->result )
{
$this->limit_offset[$this->result] = ( !empty($row_offset) ) ? $row_offset : 0;
if( $row_offset > 0 )
{
@mssql_data_seek($this->result, $row_offset);
}
}
}
else if( preg_match('#^INSERT #i', $query) )
{
if( @mssql_query($query, $this->db_connect_id) )
{
$this->result = time() + microtime();
$result_id = @mssql_query('SELECT @@IDENTITY AS id, @@ROWCOUNT as affected', $this->db_connect_id);
if( $result_id )
{
if( $row = @mssql_fetch_array($result_id) )
{
$this->next_id[$this->db_connect_id] = $row['id'];
$this->affected_rows[$this->db_connect_id] = $row['affected'];
}
}
}
}
else
{
if( @mssql_query($query, $this->db_connect_id) )
{
$this->result = time() + microtime();
$result_id = @mssql_query('SELECT @@ROWCOUNT as affected', $this->db_connect_id);
if( $result_id )
{
if( $row = @mssql_fetch_array($result_id) )
{
$this->affected_rows[$this->db_connect_id] = $row['affected'];
}
}
}
}
if( !$this->result )
{
if( $this->in_transaction )
{
@mssql_query('ROLLBACK', $this->db_connect_id);
$this->in_transaction = FALSE;
}
return false;
}
if( $transaction == END_TRANSACTION && $this->in_transaction )
{
$this->in_transaction = FALSE;
if( !@mssql_query('COMMIT', $this->db_connect_id) )
{
@mssql_query("ROLLBACK", $this->db_connect_id);
return false;
}
}
return $this->result;
}
else
{
if( $transaction == END_TRANSACTION && $this->in_transaction )
{
$this->in_transaction = FALSE;
if( !@mssql_query('COMMIT', $this->db_connect_id) )
{
@mssql_query('ROLLBACK', $this->db_connect_id);
return false;
}
}
return true;
}
}
//
// Other query methods
//
function sql_numrows($query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
if( $query_id )
{
return ( !empty($this->limit_offset[$query_id]) ) ? @mssql_num_rows($query_id) - $this->limit_offset[$query_id] : @mssql_num_rows($query_id);
}
else
{
return false;
}
}
function sql_numfields($query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
return ( $query_id ) ? @mssql_num_fields($query_id) : false;
}
function sql_fieldname($offset, $query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
return ( $query_id ) ? @mssql_field_name($query_id, $offset) : false;
}
function sql_fieldtype($offset, $query_id = 0)
{
if(!$query_id)
{
$query_id = $this->result;
}
return ( $query_id ) ? @mssql_field_type($query_id, $offset) : false;
}
function sql_fetchrow($query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
if( $query_id )
{
empty($row);
$row = @mssql_fetch_array($query_id);
while( list($key, $value) = @each($row) )
{
$row[$key] = stripslashes($value);
}
@reset($row);
return $row;
}
else
{
return false;
}
}
function sql_fetchrowset($query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
if( $query_id )
{
$i = 0;
empty($rowset);
while( $row = @mssql_fetch_array($query_id))
{
while( list($key, $value) = @each($row) )
{
$rowset[$i][$key] = stripslashes($value);
}
$i++;
}
@reset($rowset);
return $rowset;
}
else
{
return false;
}
}
function sql_fetchfield($field, $row = -1, $query_id)
{
if( !$query_id )
{
$query_id = $this->result;
}
if( $query_id )
{
if( $row != -1 )
{
if( $this->limit_offset[$query_id] > 0 )
{
$result = ( !empty($this->limit_offset[$query_id]) ) ? @mssql_result($this->result, ($this->limit_offset[$query_id] + $row), $field) : false;
}
else
{
$result = @mssql_result($this->result, $row, $field);
}
}
else
{
if( empty($this->row[$query_id]) )
{
$this->row[$query_id] = @mssql_fetch_array($query_id);
$result = stripslashes($this->row[$query_id][$field]);
}
}
return $result;
}
else
{
return false;
}
}
function sql_rowseek($rownum, $query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
if( $query_id )
{
return ( !empty($this->limit_offset[$query_id]) ) ? @mssql_data_seek($query_id, ($this->limit_offset[$query_id] + $rownum)) : @mssql_data_seek($query_id, $rownum);
}
else
{
return false;
}
}
function sql_nextid()
{
return ( $this->next_id[$this->db_connect_id] ) ? $this->next_id[$this->db_connect_id] : false;
}
function sql_affectedrows()
{
return ( $this->affected_rows[$this->db_connect_id] ) ? $this->affected_rows[$this->db_connect_id] : false;
}
function sql_freeresult($query_id = 0)
{
if( !$query_id )
{
$query_id = $this->result;
}
return ( $query_id ) ? @mssql_free_result($query_id) : false;
}
function sql_error($query_id = 0)
{
$result['message'] = @mssql_get_last_message();
return $result;
}
} // class sql_db
} // if ... define
?>
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