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

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,
--
NEC OSS Promotion Center / PG-Strom Project
KaiGai Kohei <kaigai@ak.jp.nec.com>


> -----Original Message-----
> From: Haribabu Kommi [mailto:kommi.haribabu@gmail.com]
> Sent: Tuesday, February 25, 2014 8:16 AM
> To: Kohei KaiGai
> Cc: Kaigai, Kouhei(海外, 浩平); Tom Lane; PgHacker; Robert Haas
> Subject: Re: contrib/cache_scan (Re: [HACKERS] What's needed for cache-only
> table scan?)
>
> On Mon, Feb 24, 2014 at 2:41 PM, Haribabu Kommi <kommi.haribabu@gmail.com>
> wrote:
>
>
>     On Fri, Feb 21, 2014 at 2:19 AM, Kohei KaiGai <kaigai@kaigai.gr.jp>
> wrote:
>
>
>         Hello,
>
>         The attached patch is a revised one for cache-only scan
> module
>         on top of custom-scan interface. Please check it.
>
>
>
>     I will start regress and performance tests. I will inform you the
> same once i finish.
>
>
>
> 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".
>
> cscan.c: In function ‘cs_estimate_costs’:
> cscan.c:163: warning: implicit declaration of function
> ‘get_restriction_qual_cost’
> cscan.c: In function ‘cs_add_scan_path’:
> cscan.c:437: warning: implicit declaration of function ‘bms_to_string’
> cscan.c:437: warning: passing argument 1 of ‘makeString’ makes pointer from
> integer without a cast
> cscan.c: In function ‘cs_begin_custom_scan’:
> cscan.c:493: warning: implicit declaration of function ‘bms_from_string’
> cscan.c:493: warning: assignment makes pointer from integer without a cast
>
> FATAL:  could not load library "/postgresql/cache_scan.so":
> /postgresql/cache_scan.so: undefined symbol: get_restriction_qual_cost
>
>
>
> Regards,
> Hari Babu
>
> Fujitsu Australia