SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function in (children 1)
     ExpressionList (children 2)
      Function cityHash64 (children 1)
       ExpressionList (children 1)
        Function arrayJoin (children 1)
         ExpressionList (children 1)
          Literal Array_[\'abc\', \'def\']
      Function cityHash64 (children 1)
       ExpressionList (children 1)
        Literal \'abc\'
