Hello postgres hackers:
I recently came across a scenario involving system catalog "pg_default_acl"
where a tuple contains a NULL value for the "defaclacl" attribute. This can
cause
confusion while dropping a role whose default ACL has been changed.
Here is a way to reproduce that:
``` example
Hello postgres hackers:
I recently notice that function "cursor_to_xmlschema" can lead to a crash if the
cursor parameter points to the query itself. Here is an example:
postgres=# SELECT cursor_to_xmlschema('' :: refcursor, TRUE , FALSE , 'xxx' )
into temp;
server closed the connection
