| From: | Joe Conway <mail(at)joeconway(dot)com> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Kris Jurka <books(at)ejurka(dot)com>, Alex <alex(at)meerkatsoft(dot)com>, Lada 'Ray' Lostak <ray(at)unreal64(dot)net>, pgsql-patches(at)postgresql(dot)org |
| Subject: | Re: pg_generate_sequence and info_schema patch (Was: SELECT |
| Date: | 2004-02-02 06:02:13 |
| Message-ID: | 401DE7E5.7010902@joeconway.com |
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| Thread: | |
| Lists: | pgsql-general pgsql-patches |
Tom Lane wrote:
> folklore has it that Mariner II was lost to exactly such a bug).
Ouch -- got the point.
> If you want to allow the 3-parameter form to specify a negative step
> size, that's fine. But don't use a heuristic to guess the intended
> step direction.
The attached patch implements the semantics you're looking for (I
think). Also attached is my test case output.
The one corner case not discussed is a step size of zero. Currently it
returns zero rows, but I considered having it generate an ERROR.
OK to commit?
Thanks,
Joe
| Attachment | Content-Type | Size |
|---|---|---|
| current.75.diff | text/plain | 10.3 KB |
| testcases.out | text/plain | 3.3 KB |
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