Update documentation on GRANT SCEMA USAGE, again.

diff --git a/doc/src/sgml/ref/grant.sgml b/doc/src/sgml/ref/grant.sgml
index 77977ac7169ad1a0eef5fb101c070610430f187e..e635d08a96d9644bbe0a05fba9c12d7dc603b57a 100644 (file)
--- a/doc/src/sgml/ref/grant.sgml
+++ b/doc/src/sgml/ref/grant.sgml
@@ -276,8 +276,10 @@ GRANT <replaceable class="PARAMETER">role</replaceable> [, ...]
        schema (assuming that the objects' own privilege requirements are
        also met).  Essentially this allows the grantee to <quote>look up</>
        objects within the schema.  Without this permission, it is still
-       possible to see the object names, e.g. by querying the system tables,
-       so this is not a completely secure way to prevent object access.
+       possible to see the object names, e.g. by querying the system tables.
+       Also, after revoking this permission, existing backends might have
+       statements that have previously performed this lookup, so this is not
+       a completely secure way to prevent object access.
       </para>
       <para>
        For sequences, this privilege allows the use of the