Update documentation on GRANT SCEMA USAGE, again.

diff --git a/doc/src/sgml/ref/grant.sgml b/doc/src/sgml/ref/grant.sgml
index e7ca4d1ba94c5dfe52bc331a7b160c4e79c83771..9b1ed1aebae1c06caeaa33750dd99e447370ef25 100644 (file)
--- a/doc/src/sgml/ref/grant.sgml
+++ b/doc/src/sgml/ref/grant.sgml
@@ -1,5 +1,5 @@
 
 
@@ -276,8 +276,10 @@ GRANT role [, ...]
        schema (assuming that the objects' own privilege requirements are
        also met).  Essentially this allows the grantee to 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.
       
       
        For sequences, this privilege allows the use of the