| From: | Alvaro Herrera <alvherre(at)2ndquadrant(dot)com> |
|---|---|
| To: | Hitoshi Harada <umi(dot)tanuki(at)gmail(dot)com> |
| Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Oid registry |
| Date: | 2012-09-25 15:21:56 |
| Message-ID: | 1348586360-sup-6928@alvh.no-ip.org |
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| Lists: | pgsql-hackers |
Excerpts from Hitoshi Harada's message of mar sep 25 02:11:14 -0300 2012:
> Of course you can
> look up type name conlusting SysCache and see if the type name is
> "hstore", but it's expensive to do it for every function invocation,
> so caching the hstore's oid in plv8 is the current workaround, which
> is not truly safe because the hstore's oid may change while caching.
Hm, couldn't you just register an invalidation callback with
CacheRegisterSyscacheCallback()?
--
Álvaro Herrera http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
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