Tab completion of SET TRANSACTION ISOLATION

Some time ago, the tab completion code for the SET command was changed to read 
the list of available settings from the pg_settings table.  This means that 
by the time you're done completing SET TRANSACTION ISOLATION, you've already 
sent a query and the command will be disallowed.  It's not a major issue, but 
I figured I'd mention it since it confused me a while ago.  If someone has an 
ingenious plan for working around this, let me know.

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/