Re: remove undocumented assign syntax from plpgsql doc
| От | Pavel Stehule |
|---|---|
| Тема | Re: remove undocumented assign syntax from plpgsql doc |
| Дата | |
| Msg-id | CAFj8pRDukaWkUtQRZujhbLRCh6haOY-FDunVXjf2X2XNdNOKGQ@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: remove undocumented assign syntax from plpgsql doc (Tom Lane <tgl@sss.pgh.pa.us>) |
| Ответы |
Re: remove undocumented assign syntax from plpgsql doc
|
| Список | pgsql-docs |
2014/1/11 Tom Lane <tgl@sss.pgh.pa.us>
Bruce Momjian <bruce@momjian.us> writes:
> Oh, I think you are right. I have reverted the patch. Attached is
> proposed documentation for '='.
Meh. Variable initialization is only one of multiple cases (assignment,
GET DIAGNOSTICS; maybe others, I've not examined the grammar). Also,
if we do it like this, we're implying that both := and = are equally
preferred, which might not be the impression we want to leave.
GET DIAGNOSTICS is defined by standard - and there "=" should be allowed only - although we allow ":=" too. It is a embedded SQL statement - although it is implemented as plpgsql statement.
Same situation is with UPDATE statement - we don't allow ":=" there.
I'd be a bit inclined to just stick a NOTE somewhere saying that "="
can be used in place of ":=" for assignment.
ok
If we accept it and we close this topic, then following comment should be removed
assign_operator : '=' /* not documented because it might be removed someday */
| COLON_EQUALS
;
assign_operator : '=' /* not documented because it might be removed someday */
| COLON_EQUALS
;
Regards
Pavel
regards, tom lane
В списке pgsql-docs по дате отправления: