SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 1)
    Function arrayEnumerateDense (children 1)
     ExpressionList (children 1)
      Function array (children 1)
       ExpressionList (children 3)
        Literal Tuple_(UInt64_1, UInt64_2)
        Literal Tuple_(UInt64_3, UInt64_4)
        Literal Tuple_(UInt64_1, UInt64_2)