Re: ALTER TABLE lock strength reduction patch is unsafe

Excerpts from Tom Lane's message of mar jun 21 11:06:22 -0400 2011:

> Please note that this position should not be regarded as support for
> Simon's proposed patch.  I still think the right decision is to revert
> the ALTER TABLE feature, mainly because I do not believe this is the
> last bug in it.  And the fact that there's a pre-existing bug with a
> vaguely similar symptom is no justification for introducing more bugs.

Note that this feature can be disabled by tweaking
AlterTableGetLockLevel so that it always returns AccessExclusive.

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Álvaro Herrera <alvherre@commandprompt.com>
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