From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
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To: | The Hermit Hacker <scrappy(at)hub(dot)org> |
Cc: | pgsql-hackers(at)postgresql(dot)org |
Subject: | Re: [7.0.2] node type 17 not supported ... |
Date: | 2000-09-08 03:02:44 |
Message-ID: | 22887.968382164@sss.pgh.pa.us |
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Lists: | pgsql-hackers |
The Hermit Hacker <scrappy(at)hub(dot)org> writes:
> On Thu, 7 Sep 2000, Tom Lane wrote:
>> I have committed a fix into REL7_0 branch. Although it seems to work,
>> I don't trust it really far because it depends on heap_markpos() and
>> heap_restrpos(), which haven't been used in a long time and are full
>> of alarmed-sounding comments.
> Do you have any thoughts as to what sorts of problems *might*
> arise? Like, are we talking database corruption possibilities, or bad
> results, or ... ? Just want to have an idea of what to try and keep an
> eye out for ...
I may be overstating the cause for worry. All of the "alarmed-sounding
comments" appear to date back to the original Postgres95 sources, and
are probably obsolete. The only thing I really have any concern about
is whether buffer pin/unpin bookkeeping is correct. If it's not,
you'd see an Assert failure from too many unpins (you are running with
--enable-cassert I hope) or "Buffer Leak" notices in the log from too
many pins.
regards, tom lane
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