<para>
Once you are satisfied with the upgrade, you can delete the old
cluster's data directories by running the script mentioned when
- <command>pg_upgrade</command> completes. You can also delete the
- old installation directories
- (e.g. <filename>bin</>, <filename>share</>). This will not work
- if you have tablespaces inside the old data directory.
+ <command>pg_upgrade</command> completes. (Automatic deletion is not
+ possible if you have user-defined tablespaces inside the old data
+ directory.) You can also delete the old installation directories
+ (e.g. <filename>bin</>, <filename>share</>).
</para>
</step>
variant in parts of complex queries. Only the <literal>WITH</>,
<literal>UNION</>, <literal>INTERSECT</>, <literal>EXCEPT</>,
<literal>ORDER BY</>, <literal>LIMIT</>, <literal>OFFSET</>,
- <literal>FETCH</> and locking clauses can be used with <command>TABLE</>;
- the <literal>WHERE</> clause and any form of aggregation cannot
+ <literal>FETCH</> and <literal>FOR</> locking clauses can be used
+ with <command>TABLE</>; the <literal>WHERE</> clause and any form of
+ aggregation cannot
be used.
</para>
</refsect2>