On 2014-07-11 11:07:21 -0400, Tom Lane wrote:
> David G Johnston <david.g.johnston@gmail.com> writes:
> > Benedikt Grundmann wrote
> >> That is it possible to tell the planner that index is off limits i.e.
> >> don't ever generate a plan using it?
>
> > Catalog hacking could work but not recommended (nor do I know the proper
> > commands and limitations). Do you need the database/table to accept writes
> > during the testing period?
>
> Hacking pg_index.indisvalid could work, given a reasonably recent PG.
> I would not try it in production until I'd tested it ;-)
Works, but IIRC can cause problems at least < 9.4 because concurrent
cache builds might miss the pg_index row...
Greetings,
Andres Freund
-- Andres Freund http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training &
Services
