protected function _addSelect(array $columns) {
		if(array_values($columns) === $columns) {
			foreach($columns as $k=>$v) {
				unset($columns[$k]);
				$columns[$v] = $v;
			}
		}
		$this->columns = array_merge($this->columns, $columns);
		return $this;
	}
protected function _addSelect(array $columns) {
		if(array_values($columns) === $columns) {
			foreach($columns as $k=>$v) {
				unset($columns[$k]);
				$columns[$v] = $v;
			}
		}
		$this->columns = array_merge($this->columns, $columns);
		return $this;
	}
protected function _addSelect ( array $ columns ) { if ( array_values ( $ columns ) === $ columns ) { foreach ( $ columns as $ k => $ v ) { unset ( $ columns [ $ k ] ) ; $ columns [ $ v ] = $ v ; } } $ this -> columns = array_merge ( $ this -> columns , $ columns ) ; return $ this ; }
Add array of SELECT columns.
@param array $columns
Add array of SELECT columns .