Ivan Voras <[EMAIL PROTECTED]> writes:
> select * from tt where (flags & 16) != 0;
>
> I suspected radix trees could be used for this but it seems it doesn't work
> that way.
You would need a gist index method to make this work. I actually worked on one
for a while and had it working. But it wasn't really finished. If there's
interest I could finish it up and put it up somewhere like pgfoundry.
> If not, is there a way of quickly filtering by such "elements of a set" that
> doesn't involve creating 32 boolean fields (which would also need to be pretty
> uselessly indexed separately)?
You could create 32 partial indexes on some other column which wouldn't really
take much more space than a single index on that other column. But that won't
let you combine them effectively as a gist index would.
--
greg
---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that your
message can get through to the mailing list cleanly
