Teodor Sigaev <teodor@sigaev.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