Re: brin regression test intermittent failures - Mailing list pgsql-hackers

From Tom Lane
Subject Re: brin regression test intermittent failures
Date
Msg-id 13134.1433438099@sss.pgh.pa.us
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In response to Re: brin regression test intermittent failures  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: brin regression test intermittent failures  (Alvaro Herrera <alvherre@2ndquadrant.com>)
List pgsql-hackers
I wrote:
> I think it would be a good idea to extend the brinopers table to include
> the number of expected matches, and to complain if that's not what we got,
> rather than simply checking for zero.

Also, further experimentation shows that there are about 30 entries in the
brinopers table that give rise to seqscan plans even when we're commanding
a bitmap scan, presumably because those operators aren't brin-indexable.
They're not the problematic cases, but things like 
((charcol)::text > 'A'::text)

Is there a reason to have such things in the table, or is this just a
thinko?  Or is it actually a bug that we're getting such plans?
        regards, tom lane



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