Re: LIMIT NULL

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