| From: | Andres Freund <andres(at)anarazel(dot)de> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Dmitry Dolgov <9erthalion6(at)gmail(dot)com>, Pavel Stehule <pavel(dot)stehule(at)gmail(dot)com>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Justin Pryzby <pryzby(at)telsasoft(dot)com>, David Steele <david(at)pgmasters(dot)net>, Nikita Glukhov <n(dot)gluhov(at)postgrespro(dot)ru>, Alvaro Herrera <alvherre(at)2ndquadrant(dot)com>, David Fetter <david(at)fetter(dot)org>, Thomas Munro <thomas(dot)munro(at)gmail(dot)com>, Oleksandr Shulgin <oleksandr(dot)shulgin(at)zalando(dot)de>, Robert Haas <robertmhaas(at)gmail(dot)com>, Michael Paquier <michael(dot)paquier(at)gmail(dot)com>, Oleg Bartunov <obartunov(at)gmail(dot)com>, Peter Eisentraut <peter(dot)eisentraut(at)2ndquadrant(dot)com>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [HACKERS] [PATCH] Generic type subscripting |
| Date: | 2020-12-09 01:30:03 |
| Message-ID: | 20201209013003.hj4ealuvwmzvczs2@alap3.anarazel.de |
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| Lists: | pgsql-hackers |
Hi,
On 2020-12-08 11:05:05 -0500, Tom Lane wrote:
> I've now studied this patch and it seems sane to me, although
> I wondered why you wrote "extern"s here:
Brainfart...
> Other than that nit, please finish this up and push it so I can finish
> the generic-subscripting patch.
Done.
> > WRT the prototype, I think it may be worth removing most of the types
> > from llvmjit.h. Worth keeping the most common ones, but most aren't used
> > all the time so terseness doesn't matter that much, and
> > the llvm_pg_var_type() would suffice.
>
> Hm, that would mean redoing llvm_pg_var_type() often wouldn't it?
> I don't have a very good feeling for how expensive that is, so I'm
> not sure if this seems like a good idea or not.
It should be fairly cheap - it's basically one hashtable lookup.
Greetings,
Andres Freund
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