protected function whereColumn(Builder $query, $where)
    {
        return $this->wrap($where['first']).' '.$where['operator'].' '.$this->wrap($where['second']);
    }
protected function whereColumn(Builder $query, $where)
    {
        return $this->wrap($where['first']).' '.$where['operator'].' '.$this->wrap($where['second']);
    }
protected function whereColumn ( Builder $ query , $ where ) { return $ this -> wrap ( $ where [ 'first' ] ) . ' ' . $ where [ 'operator' ] . ' ' . $ this -> wrap ( $ where [ 'second' ] ) ; }
Compile a where clause comparing two columns..

@param  \Illuminate\Database\Query\Builder  $query
@param  array  $where
@return string
Compile a where clause comparing two columns ..