jimmy <mpokky(at)126(dot)com> writes:
> ERROR: invalid cache ID: 42
> CONTEXT: parallel worker
We had a similar report back in April:
https://www.postgresql.org/message-id/flat/152337570402.31228.237601111670899842%40wrigleys.postgresql.org
but that didn't have enough information to debug the problem, and
neither does this. Can you provide a *self contained* test case,
or failing that, do some debugging of your own as suggested in the
previous thread?
https://wiki.postgresql.org/wiki/Guide_to_reporting_problems
regards, tom lane