On 09/08/2014 03:45 PM, Bruce Momjian wrote:
> On Sat, Sep 6, 2014 at 09:42:45PM -0400, Alvaro Herrera wrote:
>> Bruce Momjian wrote:
>>
>>> Here is a patch which implements the warning during CREATE INDEX ...
>>> HASH. If WAL-logging of hash indexes is ever implemented, we can remove
>>> this warning.
>>
>> I think we should have CREATE UNLOGGED INDEX, and simply disallow any
>> hash index from being created unless it's marked as such.
>
> Wow, that sounds much more radical than we discussed. Seeing I got
> push-back just for the warning, I don't see how disabling "logged" WAL
> indexes is going to be accepted.
>
> It is a good idea, though. :-)
I agree there - implementing CREATE UNLOGGED INDEX and use THAT for hash
indexes seems like a fairly clean thing to me, hash indexes _are_
unlogged so lets reflect that directly.
I could even envision pg_dump doing that conversion automatically...
Stefan
