SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function arrayJoin (alias x) (children 1)
     ExpressionList (children 1)
      Function CAST (children 1)
       ExpressionList (children 2)
        Literal \'[\\\'Hello\\\', \\\'wo\\\\\\\'rld\\\\\\\\\\\']\'
        Literal \'Array(String)\'
    Function CAST (alias y) (children 1)
     ExpressionList (children 2)
      Literal \'wo\\\\\\\'rld\\\\\\\\\'
      Literal \'FixedString(9)\'
