On 18 June 2018 at 16:36, Andrew Dunstan <andrew.dunstan@2ndquadrant.com> wrote:
>
> This is a MySQL feature, where an index is not considered by the planner.
> Implementing it should be fairly straightforward, adding a new boolean to
> pg_index, and options to CREATE INDEX and ALTER INDEX. I guess VISIBLE would
> become a new unreserved keyword.
>
> The most obvious use case is to see what the planner does when the index is
> not visible, for example which other index(es) it might use. There are
> probably other cases where we might want an index to enforce a constraint
> but not to be used in query planning.
>
> So, do we want this feature? If we do I'll go ahead and prepare a patch.
>
should pg_index.indisvalid works for this? in that case you only need
the syntax for it...
--
Jaime Casanova www.2ndQuadrant.com
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