Re: Optimising a two column OR check

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Sat, Oct 12, 2019 at 04:39:56PM +0200, Ivan Voras wrote:
> With seqscan disabled, I get this plan on 9.6:
>  Bitmap Heap Scan on friend  (cost=8.42..19.01 rows=14 width=8)
...
> I expected to get an index-only scan in this situation, as that would be a
> very common query. Is there a way to actually make this sort of query
> resolvable with an index-only scan? Maybe a different table structure would
> help?

The v11 release notes have this relevant item:

https://www.postgresql.org/docs/11/release-11.html
|Allow bitmap scans to perform index-only scans when possible (Alexander Kuzmenkov)

Justin





[Postgresql General]     [Postgresql PHP]     [PHP Users]     [PHP Home]     [PHP on Windows]     [Kernel Newbies]     [PHP Classes]     [PHP Books]     [PHP Databases]     [Yosemite]

  Powered by Linux