SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function initCap (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Function arrayJoin (children 1)
         ExpressionList (children 1)
          Literal Array_[\'hello\', \'world\']
        Literal \'FixedString(5)\'