Re: Declaring a field that is also an out parameter in a function
| От | Pavel Stehule |
|---|---|
| Тема | Re: Declaring a field that is also an out parameter in a function |
| Дата | |
| Msg-id | CAFj8pRBcwQ3CVGj7eDFezhG-dUtrsry3T9iHf0SmEnU=YXs-LQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Declaring a field that is also an out parameter in a function (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: Declaring a field that is also an out parameter in a function
Re: Declaring a field that is also an out parameter in a function |
| Список | pgsql-general |
ne 7. 7. 2024 v 0:14 odesílatel Tom Lane <tgl@sss.pgh.pa.us> napsal:
Michael Nolan <htfoot@gmail.com> writes:
> Shouldn't declaring a field that is also an OUT parameter throw an error?
No. The DECLARE is a block nested within the function,
and the parameter is declared at function scope.
So this is a standard case of an inner declaration masking
an outer one.
Possibly plpgsql_check can be set to complain about such cases,
but they're legal according to the language specification.
yes, it does
(2024-07-07 09:27:14) postgres=# select * from plpgsql_check_function('test_function');
┌───────────────────────────────────────────────────────────────┐
│ plpgsql_check_function │
╞═══════════════════════════════════════════════════════════════╡
│ warning:00000:10:statement block:parameter "d3" is overlapped │
│ Detail: Local variable overlap function parameter. │
│ warning extra:00000:8:DECLARE:never read variable "d3" │
│ warning extra:00000:unused parameter "$1" │
│ warning extra:00000:unused parameter "$2" │
│ warning extra:00000:unused parameter "$3" │
│ warning extra:00000:unmodified OUT variable "d3" │
└───────────────────────────────────────────────────────────────┘
(7 rows)
┌───────────────────────────────────────────────────────────────┐
│ plpgsql_check_function │
╞═══════════════════════════════════════════════════════════════╡
│ warning:00000:10:statement block:parameter "d3" is overlapped │
│ Detail: Local variable overlap function parameter. │
│ warning extra:00000:8:DECLARE:never read variable "d3" │
│ warning extra:00000:unused parameter "$1" │
│ warning extra:00000:unused parameter "$2" │
│ warning extra:00000:unused parameter "$3" │
│ warning extra:00000:unmodified OUT variable "d3" │
└───────────────────────────────────────────────────────────────┘
(7 rows)
but looks so there are false alarms related to using an alias. It is interesting so I have not any report about this issue, so probably using aliases is not too common today.
Regards
Pavel
regards, tom lane
В списке pgsql-general по дате отправления: