On Tue, 2008-02-26 at 17:22 -0500, Tom Lane wrote:
> "Joshua D. Drake" <jd@xxxxxxxxxxxxxxxxx> writes:
> > "Scott Marlowe" <scott.marlowe@xxxxxxxxx> wrote:
> >> begin;
> >> drop index abc_dx;
> >> select ....
> >> rollback;
> >>
> >> and viola, your index is still there. note that there are likely some
> >> locking issues with this, so be careful with it in production. But on
> >> a test box it's a very easy way to test various indexes.
>
> > Wouldn't you also bloat the index?
>
> No, what makes you think that? The index won't change at all in the
> above example. The major problem is, as Scott says, that DROP INDEX
> takes exclusive lock on the table so any other sessions will be locked
> out of it for the duration of your test query.
It may cause catalog bloat though, right?
Regards,
Jeff Davis
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