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 ;-)
regards, tom lane