| From: | Jeff Davis <pgsql(at)j-davis(dot)com> |
|---|---|
| To: | Alexander Korotkov <aekorotkov(at)gmail(dot)com>, Heikki Linnakangas <heikki(dot)linnakangas(at)enterprisedb(dot)com> |
| Cc: | pgsql-hackers(at)postgresql(dot)org |
| Subject: | Re: GiST for range types (was Re: Range Types - typo + NULL string constructor) |
| Date: | 2011-11-01 04:33:32 |
| Message-ID: | 1320122012.23464.4.camel@jdavis |
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| Lists: | pgsql-hackers |
On Mon, 2011-10-24 at 15:05 +0400, Alexander Korotkov wrote:
> I think implementing subtype_diff for each datatype is ok. We could
> implement some universal function based on minus operator and casting
> to double precision. But such solution might be unacceptable in
> both predictability (operator and casting function might do not the
> things we expect) and performance.
>
Done.
Everything is complete in this patch with the exception of two optional
things, which I still intend to do but might best be done in a separate
commit:
* support typmod for ranges
* support casts between different range types
Both of these things, I believe, require the introduction of an
RangeCoerceExpr, similar to ArrayCoerceExpr. That's fine, but it creates
a rather large diff, so it might be best left for a later commit.
Regards,
Jeff Davis
| Attachment | Content-Type | Size |
|---|---|---|
| rangetypes-20111101.gz | application/x-gzip | 49.5 KB |
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