| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, Kouhei Kaigai <kaigai(at)ak(dot)jp(dot)nec(dot)com>, Shigeru Hanada <shigeru(dot)hanada(at)gmail(dot)com>, Kohei KaiGai <kaigai(at)kaigai(dot)gr(dot)jp>, Simon Riggs <simon(at)2ndquadrant(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, Andres Freund <andres(at)2ndquadrant(dot)com>, PgHacker <pgsql-hackers(at)postgresql(dot)org>, Jim Mlodgenski <jimmy76(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net> |
| Subject: | Re: [v9.5] Custom Plan API |
| Date: | 2014-08-22 16:09:59 |
| Message-ID: | 18602.1408723799@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Robert Haas <robertmhaas(at)gmail(dot)com> writes:
> I think the threshold question for this incarnation of the patch is
> whether we're happy with new DDL (viz, CREATE CUSTOM PLAN PROVIDER) as
> a way of installing new plan providers into the database.
I tend to agree with your conclusion that that's a whole lot of
infrastructure with very little return. I don't see anything here
we shouldn't do via function hooks instead, and/or a "register" callback
from a dynamically loaded library.
Also, we tend to think (for good reason) that once something is embedded
at the SQL level it's frozen; we are much more willing to redesign C-level
APIs. There is no possible way that it's a good idea for this stuff to
get frozen in its first iteration.
regards, tom lane
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