| From: | Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com> |
|---|---|
| To: | Vladimir Sitnikov <sitnikov(dot)vladimir(at)gmail(dot)com> |
| Cc: | Albe Laurenz <laurenz(dot)albe(at)wien(dot)gv(dot)at>, Marko Tiikkaja <marko(at)joh(dot)to>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>, Dave Cramer <pg(at)fastcrypt(dot)com> |
| Subject: | Re: Fwd: [JDBC] Re: 9.4-1207 behaves differently with server side prepared statements compared to 9.2-1102 |
| Date: | 2016-01-12 15:55:47 |
| Message-ID: | CAFj8pRB5+R0HHaBUPHA7aiLYzitoRJYYC7NFFHWKM=JzoT0pyw@mail.gmail.com |
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| Lists: | pgsql-hackers pgsql-jdbc |
2016-01-12 16:52 GMT+01:00 Vladimir Sitnikov <sitnikov(dot)vladimir(at)gmail(dot)com>:
> > I don't know if there is a good solution except disabling server
> prepared statements.
>
> Why doesn't backend reuse already existing good plan?
>
probably good plan is more expensive than wrong plan :(
this logic is driven by plan cost, not by plan execution time.
> The plan does account for the skew.
>
> Can backend take selectivities from the original bind values?
>
> Vladimir
>
>
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