| From: | "David E(dot) Wheeler" <david(at)kineticode(dot)com> |
|---|---|
| To: | Bruce Momjian <bruce(at)momjian(dot)us> |
| Cc: | PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: LIMIT NULL |
| Date: | 2009-02-02 18:04:11 |
| Message-ID: | 70A4F459-E2F8-44CA-8229-7FC3FB85E977@kineticode.com |
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| Thread: | |
| Lists: | pgsql-hackers |
On Feb 2, 2009, at 9:58 AM, Bruce Momjian wrote:
>> Is it intentional that `LIMIT NULL` means the same as `LIMIT ALL`? If
>> so, I'd like to submit a patch to document it, because I've found it
>> useful in SQL functions:
>>
>> http://justatheory.com/computers/databases/postgresql/dynamic-limit.html
>
> Uh, I figure LIMIT NULL should return no rows.
Well, LIMIT 0 does that, and it's useful to have a type-compatible
option to LIMIT that allows it to return all rows. And I say type-
compatible, because you can't pass "ALL" as a bare string via a
function like COALESCE.
Best,
David
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