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Re: _bt_parent_deletion_safe() isn't safe

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Bruce Momjian <bruce(at)momjian(dot)us>
Cc: pgsql-hackers(at)postgresql(dot)org, Jeff Amiel <becauseimjeff(at)yahoo(dot)com>
Subject: Re: _bt_parent_deletion_safe() isn't safe
Date: 2010-07-03 02:02:59
Message-ID: 1045.1278122579@sss.pgh.pa.us (view raw or flat)
Thread:
Lists: pgsql-hackers
Bruce Momjian <bruce(at)momjian(dot)us> writes:
> Tom Lane wrote:
>> A search of the archives produces no evidence that anyone has ever
>> reported the "failed to delete rightmost child" error from the field.
>> So while I still think this is a bug that needs to be fixed, it may
>> be lower priority than I thought initially.

> Is this a TODO?

Possibly.  I was planning to go back and study that code a bit more ---
I have a feeling that there might be some kind of rare concurrency bug
involved in btree page deletion.  But I've been up to my rear in
other alligators for the past several weeks.

			regards, tom lane

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