| From: | Mark Rofail <markm(dot)rofail(at)gmail(dot)com> |
|---|---|
| To: | Andreas Karlsson <andreas(at)proxel(dot)se> |
| Cc: | Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org>, Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Stephen Frost <sfrost(at)snowman(dot)net>, David Steele <david(at)pgmasters(dot)net>, Erik Rijkers <er(at)xs4all(dot)nl>, Robert Haas <robertmhaas(at)gmail(dot)com>, pgsql-hackers <pgsql-hackers(at)postgresql(dot)org>, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Hans-Jürgen Schönig <hs(at)cybertec(dot)at> |
| Subject: | Re: [HACKERS] GSoC 2017: Foreign Key Arrays |
| Date: | 2018-02-01 15:17:04 |
| Message-ID: | CAJvoCutVQ37Y=7Okme+3KpXi491uhdF4_bV-E3exmzpi8Jtr_w@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Wed, Jan 31, 2018 at 1:52 AM, Andreas Karlsson <andreas(at)proxel(dot)se> wrote:
> I looked some at your anyarray @>> anyelement code and sadly it does not
> look like the index code could work. The issue I see is that
> ginqueryarrayextract() needs to make a copy of the search key but to do so
> it needs to know the type of anyelement (to know if it needs to detoast,
> etc). But there is as far as I can tell no way to check the type of
> anyelement in this context.
>
since its a polymorphic function it only passes if the `anyarray` is the
same type of the `anyelement` so we are sure they are the same type. Can't
we get the type from the anyarray ? the type is already stored in `
arr_type`.
Best Regards,
Mark Rofail
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