ALTER TABLE sometimes takes only ShareUpdateExclusiveLock.

Robert Haas <rhaas@postgresql.org>

Commit: 7212c77d0cabcc468fec0b9cd7f2413b64b77050
Author: Robert Haas <rhaas@postgresql.org>
Date: 2011-02-03T20:14:27Z
Releases: 9.1.0
ALTER TABLE sometimes takes only ShareUpdateExclusiveLock.

Along the way, be more consistent about the wording we use here.

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doc/src/sgml/mvcc.sgml modified +4 −3