| From: | Guyren Howe <guyren(at)gmail(dot)com> |
|---|---|
| To: | Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> |
| Cc: | "pgsql-general(at)lists(dot)postgresql(dot)org" <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Reproducing query plans in empty database: can I just copy stats and settings? |
| Date: | 2019-07-29 21:59:08 |
| Message-ID: | 70D44AFB-74C8-4643-81C2-0A0143C68C47@gmail.com |
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| Lists: | pgsql-general |
On Jul 29, 2019, at 12:25 , Adrian Klaver <adrian(dot)klaver(at)aklaver(dot)com> wrote:
>
> On 7/29/19 12:07 PM, Guyren Howe wrote:
>> I work with Protected Health Information so have restricted access to an important database.
>> I would like to look into index and query changes for that database. It occurs to me that if I was able to reproduce the statistics and cost settings for the database, then Explain would produce identical results to the production database.
>> Can do this? Any other advice?
>
> So what defines restricted access?
>
> If you can't see/use the data in the production database in your test database I'm not sure how copying the statistics/cost settings is going to help.
Isn’t that the entirety of what the query plan is based on? I was hoping I could then run Explain as if I had the data.
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