Обсуждение: Is there a way to get both the plan and the results?

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Is there a way to get both the plan and the results?

От
François Beausoleil
Дата:
Hi all!

Building a small tool, and it would be super useful if I could get both the query results and the plan at the same
time.At the moment, the tool accepts a SQL query, drops it into a file and call psql --file=whatever.sql. I can change
touse a lower-level API if necessary. 

Ideally, I’d like to do something like EXLAIN (ANALYZE, RESULTS) SELECT ...

I’m talking about multi-minute queries, so it’s less than ideal if I have to run the query twice: once for EXPLAIN
ANALYZE,once for the actual results. 

Looking around, https://duckduckgo.com/?q=postgresql+get+query+results+and+query+plan+in+single+call doesn’t return
anythinguseful. Google neither, for that matter. The PG mailing list archives seem to not have any results on that. 

I’m specifically using 9.1. Not opposed to upgrade if necessary.

Thanks!
François Beausoleil



Re: Is there a way to get both the plan and the results?

От
David G Johnston
Дата:

François Beausoleil wrote
> Hi all!
>
> Building a small tool, and it would be super useful if I could get both
> the query results and the plan at the same time. At the moment, the tool
> accepts a SQL query, drops it into a file and call psql
> --file=whatever.sql. I can change to use a lower-level API if necessary.
>
> Ideally, I’d like to do something like EXLAIN (ANALYZE, RESULTS) SELECT
> ...
>
> I’m talking about multi-minute queries, so it’s less than ideal if I have
> to run the query twice: once for EXPLAIN ANALYZE, once for the actual
> results.
>
> Looking around,
> https://duckduckgo.com/?q=postgresql+get+query+results+and+query+plan+in+single+call
> doesn’t return anything useful. Google neither, for that matter. The PG
> mailing list archives seem to not have any results on that.
>
> I’m specifically using 9.1. Not opposed to upgrade if necessary.

See:

http://www.postgresql.org/docs/9.1/static/auto-explain.html

There is no way to do so from a client interface.

David J.




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