SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 1)
    Function tuple (alias x) (children 1)
     ExpressionList (children 3)
      Literal UInt64_3
      Literal UInt64_4
      Literal UInt64_5
   ExpressionList (children 1)
    Function CAST (children 1)
     ExpressionList (children 2)
      Function tupleElement (children 1)
       ExpressionList (children 2)
        Identifier x
        Literal UInt64_1
      Literal \'Int32\'
