SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Literal Tuple_(\'1\', UInt64_2) (alias t)
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_1
    Function tupleElement (children 1)
     ExpressionList (children 2)
      Identifier t
      Literal UInt64_2