Re: Is there a way to temporarily disable a index

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

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