<para>
Acquired by the <command>DROP TABLE</>,
<command>TRUNCATE</command>, <command>REINDEX</command>,
- <command>CLUSTER</command>, and <command>VACUUM FULL</command>
+ <command>CLUSTER</command>, <command>VACUUM FULL</command>,
+ and <command>REFRESH MATERIALIZED VIEW</command> (without
+ <option>CONCURRENTLY</option>)
commands. Many forms of <command>ALTER TABLE</> also acquire
a lock at this level (see <xref linkend="SQL-ALTERTABLE">).
This is also the default lock mode for <command>LOCK TABLE</command>