From: | Andres Freund <andres(at)anarazel(dot)de> |
---|---|
To: | Peter Geoghegan <pg(at)heroku(dot)com> |
Cc: | Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: Refactoring speculative insertion with unique indexes a little |
Date: | 2015-10-03 13:38:10 |
Message-ID: | 20151003133810.GD3323@alap3.anarazel.de |
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Lists: | pgsql-hackers |
Hi,
On 2015-06-10 16:19:27 -0700, Peter Geoghegan wrote:
> Currently, speculative insertion (the INSERT ... ON CONFLICT DO UPDATE
> executor/storage infrastructure) uses checkUnique ==
> UNIQUE_CHECK_PARTIAL for unique indexes, which is a constant
> originally only used by deferred unique constraints. It occurred to me
> that this has a number of disadvantages:
> ...
> Attached patch updates speculative insertion along these lines.
> ...
> The patch also updates the AM interface documentation (the part
> covering unique indexes). It seems quite natural to me to document the
> theory of operation for speculative insertion there.
I'm not arguing against any of this - but I don't think this needs to be
on the 9.5 open items list. I plan to remove from there.
Greetings,
Andres Freund
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