From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | Hannu Krosing <hannu(at)tm(dot)ee> |
Cc: | Joe Conway <mail(at)joeconway(dot)com>, Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us>, Thomas Lockhart <lockhart(at)fourpalms(dot)org>, Neil Conway <nconway(at)klamath(dot)dyndns(dot)org>, PostgreSQL Hackers <pgsql-hackers(at)postgresql(dot)org> |
Subject: | Re: FUNC_MAX_ARGS benchmarks |
Date: | 2002-08-04 01:38:05 |
Message-ID: | 5988.1028425085@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
Hannu Krosing <hannu(at)tm(dot)ee> writes:
>> Lack of btree index support for _oid would be the first hurdle.
> Is that index really needed, or is it there just to enforce uniqueness ?
Both.
> Also, (imho ;) btree index support should be done for all array types
> which have comparison ops for elements at once (with semantics similar
> to string) not one by one for individual types.
Fine, send a patch ;-)
>> Even if we wanted to do that work, there'd be some serious breakage
>> of client queries because of the historical differences in output format
>> and subscripting. (oidvector indexes from 0, _oid from 1. Which is
>> pretty bogus, but if the regression tests are anything to judge by there
>> are probably a lot of queries out there that know this.)
> I would guess that oidvector is sufficiently obscure type and that
> nobody actually uses oidvector for user tables.
No, you miss my point: client queries that do subscripting on
proargtypes will break. Since the regression tests find this a useful
thing to do, I suspect there are clients out there that do too.
> But going to _oid will free us from arbitrary limits on argument count.
I didn't say it wouldn't be a good idea in the long run. I'm saying I
don't think it's happening for 7.3, given that Aug 31 is not that far
away anymore and that a lot of cleanup work remains undone on other
already-committed features. FUNC_MAX_ARGS=32 could happen for 7.3, though.
regards, tom lane
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