Is there a way out if someone accidentally executes the same test case
against PG12?
testdb=# create table partitioned (a int, b int)
testdb-# partition by list ((row(a, b)::partitioned));
CREATE TABLE
testdb=# DROP TABLE partitioned;
ERROR: cache lookup failed for type 18269
>
> Ah, I wasn't sure that additional tests on a table would be worthwhile
> enough.
> Thanks for tweaking and pushing!
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