Re: Reference Leak with type

Michael Paquier <michael(at)paquier(dot)xyz> writes:
> On Tue, Apr 06, 2021 at 11:09:13AM +0530, Rohit Bhogate wrote:
>> I found the below reference leak on master.

> Thanks for the report. This is indeed a new problem as of HEAD,

Just for the record, it's not new. The issue is (I think) that
the tupledesc refcount created by get_cached_rowtype is being
logged in the wrong ResourceOwner. Other cases that use
get_cached_rowtype, such as IS NOT NULL on a composite value,
reproduce the same type of failure back to v11:

create type float_rec_typ as (i float8);

do $$
declare
f float_rec_typ := row(42);
r bool;
begin
r := f is not null;
commit;
end
$$;

WARNING: TupleDesc reference leak: TupleDesc 0x7f5f549809d8 (53719,-1) still referenced
ERROR: tupdesc reference 0x7f5f549809d8 is not owned by resource owner TopTransaction

Still poking at a suitable fix.

regards, tom lane