protected function whereNull(Builder $query, $where) {
		$null = $where['not'] ? 'not null' : 'null';
		
		return $this->wrap($where['column']).' is '.$null;
	}
protected function whereNull(Builder $query, $where) {
		$null = $where['not'] ? 'not null' : 'null';
		
		return $this->wrap($where['column']).' is '.$null;
	}
protected function whereNull ( Builder $ query , $ where ) { $ null = $ where [ 'not' ] ? 'not null' : 'null' ; return $ this -> wrap ( $ where [ 'column' ] ) . ' is ' . $ null ; }
Compile a "where null" clause.

@param  Builder $query
@param  array  $where
@return string
Compile a where null clause .