Re: use_remote_explain missing in docs of postgres_fdw
От | Tom Lane |
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Тема | Re: use_remote_explain missing in docs of postgres_fdw |
Дата | |
Msg-id | 27770.1361541677@sss.pgh.pa.us обсуждение исходный текст |
Ответ на | Re: use_remote_explain missing in docs of postgres_fdw (Michael Paquier <michael.paquier@gmail.com>) |
Список | pgsql-hackers |
Michael Paquier <michael.paquier@gmail.com> writes: > On Fri, Feb 22, 2013 at 5:13 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote: >> Wups ... for some reason it's "use_remote_estimate" in the docs. Thinko >> on my part probably --- although on reflection, maybe that's a better >> name anyway? > Indeed, use_remote_estimate is better. use_remote_explain makes it sound > like an EXPLAIN query would be sent to remote server. That is at least the > first impression I had when testing the feature without reading the docs. Well, it does do that, at least for the part of the query that will be executed on the remote server. But if you read it to mean the whole query would be EXPLAINed on the remote server, that's wrong. The objection I have to "use_remote_explain" is that it's focusing too much on the mechanism (ie, send an EXPLAIN command for execution) rather than the result (ie, get a cost estimate from the remote server). So I'm inclined to change the code to match the docs rather than vice versa. Anyone have a contrary opinion? regards, tom lane
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