| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Teodor Sigaev <teodor(at)sigaev(dot)ru> |
| Cc: | Pgsql Hackers <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: Index AM change proposals, redux |
| Date: | 2008-04-10 17:48:14 |
| Message-ID: | 5584.1207849694@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
Teodor Sigaev <teodor(at)sigaev(dot)ru> writes:
> Both GIN and GiST make a call of transformation function before indexing value.
> I suppose, there is no automatic way to set this flag even in case when type of
> storage and type of indexing value are the same.
> So, I see three variant:
> - add flag in pg_am
> - add flag to create operator class and by default it should point to
> impossibility to get value from index. At least for GIN and GiST.
Yeah, just as messy as I feared :-(. My inclination for the first pass
would be to just make it a per-AM flag in pg_am. We could always
complicate matters later.
(Of course, this is all hypothetical since no patch is on the
horizon...)
regards, tom lane
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