SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arraySort (children 1)
     ExpressionList (children 1)
      Function arrayUnion (children 1)
       ExpressionList (children 3)
        Literal Array_[\'hi\']
        Literal Array_[\'hello\', \'hi\']
        Function array (children 1)
         ExpressionList