Document permissions needed for pg_database_size and pg_tablespace_size.

tglsfdc · tglsfdc · commit 901202248ea4 · 2014-05-08T21:45:19.000-04:00
Back in 8.3, we installed permissions checks in these functions (see commits 8bc225e and cc26599). But we forgot to document that anywhere in the user-facing docs; it did get mentioned in the 8.3 release notes, but nobody's looking at that any more. Per gripe from Suya Huang.
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
@@ -15090,7 +15090,11 @@ postgres=# SELECT * FROM pg_xlogfile_name_offset(pg_stop_backup());
    <para>
     <function>pg_database_size</function> and <function>pg_tablespace_size</>
     accept the OID or name of a database or tablespace, and return the total
-    disk space used therein.
+    disk space used therein.  To use <function>pg_database_size</function>,
+    you must have <literal>CONNECT</> permission on the specified database
+    (which is granted by default).  To use <function>pg_tablespace_size</>,
+    you must have <literal>CREATE</> permission on the specified tablespace,
+    unless it is the default tablespace for the current database.
    </para>
 
    <para>
