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ALTER TABLE sometimes takes only ShareUpdateExclusiveLock. 

Along the way, be more consistent about the wording we use here.
This commit is contained in:
Robert Haas 2011-02-03 15:14:27 -05:00
parent df63aac678
commit 7212c77d0c
1 changed files with 4 additions and 3 deletions
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7
doc/src/sgml/mvcc.sgml
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@ -656,7 +656,8 @@ SELECT SUM(value) FROM mytab WHERE class = 2;
<para>
Acquired by <command>VACUUM</command> (without <option>FULL</option>),
<command>ANALYZE</>, and <command>CREATE INDEX CONCURRENTLY</>.
<command>ANALYZE</>, <command>CREATE INDEX CONCURRENTLY</>, and
some forms of <command>ALTER TABLE</command>.
</para>
</listitem>
</varlistentry>
@ -699,7 +700,7 @@ SELECT SUM(value) FROM mytab WHERE class = 2;
<para>
Acquired by <command>CREATE TRIGGER</command>,
<command>CREATE RULE</command> (except for <literal>ON SELECT</>
rules) and in some cases <command>ALTER TABLE</command>.
rules) and some forms of <command>ALTER TABLE</command>.
</para>
</listitem>
</varlistentry>
@ -747,7 +748,7 @@ SELECT SUM(value) FROM mytab WHERE class = 2;
Acquired by the <command>DROP TABLE</command>,
<command>TRUNCATE</command>, <command>REINDEX</command>,
<command>CLUSTER</command>, and <command>VACUUM FULL</command>
commands, as well as most variants of <command>ALTER TABLE</>.
commands, and some forms of <command>ALTER TABLE</>.
This is also the default lock mode for <command>LOCK TABLE</command>
statements that do not specify a mode explicitly.
</para>