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<?php
/*
@author dhtmlx.com
@license GPL, see license.txt
*/
require_once("db_common.php");
/*! MSSQL implementation of DataWrapper
**/
class MsSQLDBDataWrapper extends DBDataWrapper{
private $last_id=""; //!< ID of previously inserted record
private $insert_operation=false; //!< flag of insert operation
private $start_from=false; //!< index of start position
public function query($sql){
LogMaster::log($sql);
$res = mssql_query($sql,$this->connection);
if ($this->insert_operation){
$last = mssql_fetch_assoc($res);
$this->last_id = $last["dhx_id"];
mssql_free_result($res);
}
if ($this->start_from)
mssql_data_seek($res,$this->start_from);
return $res;
}
public function get_next($res){
return mssql_fetch_assoc($res);
}
public function get_new_id(){
/*
MSSQL doesn't support identity or auto-increment fields
Insert SQL returns new ID value, which stored in last_id field
*/
return $this->last_id;
}
protected function insert_query($data,$request){
$sql = parent::insert_query($data,$request);
$this->insert_operation=true;
return $sql.";SELECT @@IDENTITY AS dhx_id";
}
protected function select_query($select,$from,$where,$sort,$start,$count){
if (!$from)
return $select;
$sql="SELECT " ;
if ($count)
$sql.=" TOP ".($count+$start);
$sql.=" ".$select." FROM ".$from;
if ($where) $sql.=" WHERE ".$where;
if ($sort) $sql.=" ORDER BY ".$sort;
if ($start && $count)
$this->start_from=$start;
else
$this->start_from=false;
return $sql;
}
public function escape($data){
/*
there is no special escaping method for mssql - use common logic
*/
return str_replace("'","''",$data);
}
public function begin_transaction(){
$this->query("BEGIN TRAN");
}
}
?>
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