On Mon, Jun 17, 2024 at 07:00:51PM +0200, Michail Nikolaev wrote:
> The same issue may happen in case of CREATE/DROP INDEX CONCURRENTLY as well.
While looking at all that, I've been also curious about this specific
point, and it is indeed possible to finish in a state where a
duplicate key would be found in one of indexes selected by the
executor during an INSERT ON CONFLICT while a concurrent set of CICs
and DICs are run, so you don't really need a REINDEX. See for example
the attached test.
--
Michael
