cen <cen(dot)is(dot)imba(at)gmail(dot)com> writes:
> we are upgrading to 12.3 from 9.X and encountered an error with delete
> statements.
> 2020-07-14 15:26:20.728 CEST [67736] ERROR: cache lookup failed for
> collation 0
Please supply a self-contained example. (Mostly, I'm not interested
in trying to guess at your table schema.)
regards, tom lane