public function log_or_skip_record($data, $filename){
			$json=json_encode($data);
			$hash=md5($json.$filename);
			$sql="select id from import_tracking where import_file='{$this->qdb->esc($filename)}' and row_hash='{$hash}'";
			$row=$this->qdb->all($sql);
			if(count($row)==0){
				$sql="insert into import_tracking (import_file,row_hash,json, created)";
				$sql.="values ('{$this->qdb->esc($filename)}','{$hash}','{$this->qdb->esc($json)}',NOW())";
				$this->qdb->query($sql);
				return $data;
			}
			else {

				return array();
			}
			//exit();
		}