SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function toUInt64 (alias x) (children 1)
     ExpressionList (children 1)
      Literal \'9223372036854775809\'
    Function toDecimal64 (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal UInt64_0
