SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function toInt64 (alias x) (children 1)
     ExpressionList (children 1)
      Literal \'2147483649\'
    Function toDecimal32 (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal UInt64_0