Re: contrib/cache_scan (Re: What's needed for cache-only table scan?)

On Tue, Feb 25, 2014 at 10:44 AM, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>wrote:

> Thanks for your testing,
>
> > Getting some compilation warnings while compiling the extension and also
> > I am not able to load the extension because of undefined symbol
> > "get_restriction_qual_cost".
> >
> It seems to me you applied only part-1 portion of the custom-scan patches.
>
> The get_restriction_qual_cost() is re-defined as extern function, from
> static one, on the part-2 portion (ctidscan) to estimate cost value of the
> qualifiers in extension. Also, bms_to_string() and bms_from_string() are
> added on the part-3 portion (postgres_fdw) portion to carry a bitmap-set
> according to the copyObject manner.
>
> It may make sense to include the above supplemental changes in the cache-
> scan feature also, until either of them getting upstreamed.

Thanks for the information, I will apply other patches also and start
testing.

Regards,
Hari Babu
Fujitsu Australia