Re: Assertions in PL/PgSQL
| От | Pavel Stehule |
|---|---|
| Тема | Re: Assertions in PL/PgSQL |
| Дата | |
| Msg-id | CAFj8pRBy=wjkGL2bmntQVE2uYX4A5EQBGJRyKytwbtuTPaC-qA@mail.gmail.com обсуждение исходный текст |
| Ответ на | Re: Assertions in PL/PgSQL (Marko Tiikkaja <marko@joh.to>) |
| Ответы |
Re: Assertions in PL/PgSQL
|
| Список | pgsql-hackers |
2013/9/14 Marko Tiikkaja <marko@joh.to>
On 2013-09-14 22:40, I wrote:The comment at the beginning of pl_scanner.c seems to suggest same.Someone may prove me wrong here, but to me it looks like this would only
prevent ASSERT from being used as the name of a PL/PgSQL variable.
yes, there are no too much possibilities, how to do it.
Effective implementation needs a special PLpgSQL statement - but I am 100% happy with proposed syntax. We introduce a new special keyword just for one simple construct.
A some languages has a generic PRAGMA keyword. So I would be much more happy with something like
PRAGMA Assert(found);
It is much more close to ADA, and it allows a reuse of new keyword for any other usage in future (your proposal is too simply, without possibility open new doors in future). And we can define a some standard predefined asserts too - like Assert, AssertNotNull, AssertNotEmpty, ...
other issue - A asserts macros has one or two parameters usually. You should to support two params assert (with message).
Regards,
Marko Tiikkaja
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