SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 3)
    Function toDecimal64 (alias x) (children 1)
     ExpressionList (children 2)
      Literal \'1234567890\'
      Literal UInt64_8
    Function toDecimal64 (children 1)
     ExpressionList (children 2)
      Identifier x
      Literal UInt64_9
    Function toDecimal64 (children 1)
     ExpressionList (children 2)
      Function toDecimal64 (children 1)
       ExpressionList (children 2)
        Literal \'1234567890\'
        Literal UInt64_8
      Literal UInt64_9