Re: tweak to a few index tests to hits ambuildempty() routine.

On 2021-Nov-29, Amul Sul wrote:

> Attached patch is doing small changes to brin, gin & gist index tests
> to use an unlogged table without changing the original intention of
> those tests and that is able to hit ambuildempty() routing which is
> otherwise not reachable by the current tests.

I added one change to include spgist too, which was uncovered, and
pushed this.

Thanks for the patch!

-- 
Álvaro Herrera         PostgreSQL Developer  —  https://www.EnterpriseDB.com/
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