From: | Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com> |
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To: | Stephen Frost <sfrost(at)snowman(dot)net> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Robert Haas <robertmhaas(at)gmail(dot)com>, "Simon Riggs" <simon(at)2ndquadrant(dot)com>, Andres Freund <andres(at)2ndquadrant(dot)com>, PgHacker <pgsql-hackers(at)postgresql(dot)org>, Shigeru Hanada <shigeru(dot)hanada(at)gmail(dot)com>, Jim Mlodgenski <jimmy76(at)gmail(dot)com>, "Peter Eisentraut" <peter_e(at)gmx(dot)net>, Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp> |
Subject: | Re: [v9.5] Custom Plan API |
Date: | 2014-05-09 02:26:58 |
Message-ID: | 9A28C8860F777E439AA12E8AEA7694F8F9FA87@BPXM15GP.gisp.nec.co.jp |
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Lists: | pgsql-hackers |
> * Kouhei Kaigai (kaigai(at)ak(dot)jp(dot)nec(dot)com) wrote:
> > I initially intended to allow extensions to add their custom-path
> > based on their arbitrary decision, because the core backend cannot
> > have expectation towards the behavior of custom-plan.
> > However, of course, the custom-path that replaces built-in paths shall
> > have compatible behavior in spite of different implementation.
>
> I didn't ask this before but it's been on my mind for a while- how will
> this work for custom data types, ala the 'geometry' type from PostGIS?
> There's user-provided code that we have to execute to check equality for
> those, but they're not giving us CUDA code to run to perform that equality...
>
If custom-plan provider support the user-defined data types such as PostGIS,
it will be able to pick up these data types also, in addition to built-in
ones. It fully depends on coverage of the extension.
If not a supported data type, it is not a show-time of GPUs.
In my case, if PG-Strom can also have compatible code, but runnable on OpenCL,
of them, it will say "yes, I can handle this data type".
Thanks,
--
NEC OSS Promotion Center / PG-Strom Project
KaiGai Kohei <kaigai(at)ak(dot)jp(dot)nec(dot)com>
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