Re: Postgres 16.1 - Bug: cache entry already complete

Hi Tom,

Thanks for reaching out. So far, I was able to narrow it down to a problem when doing a union between two tables, one of them having a varchar column and the other one having a text column. Adding an explicit cast seems to have fixed it, but not really sure why yet. I will try to create a simple repro scenario.

Thanks,

On Tue, Jan 2, 2024 at 2:31 PM Tom Lane <tgl@sss.pgh.pa.us> wrote:

Amadeo Gallardo <amadeo@ruddr.io> writes:
> Upgrading from Postgres 14 to Postgres 16.1 introduced the following error
> when running a query:

> nativeError: error: select "date", coalesce(sum(hours), 0) as "hours" from
> "allocation_date" where "allocation_date"."project_id" = $1 and
> "allocation_date"."date" > $2 and "allocation_date"."hours" > $3 group by
> "date" order by "date" asc - cache entry already complete

> Note that `allocation_date` is a fairly complex view. Not quite sure what
> causes the "cache entry already complete", but it consistently failed in
> both the MacOS and Windows installations.

The only occurrence of that error string is in nodeMemoize.c, so
I suppose you've found a bug in Memoize.  A bit odd that it doesn't
manifest in v14 where Memoize came in.  But anyway, can you reduce
this to a self-contained test case?

                        regards, tom lane

--

Amadeo Gallardo

email: amadeo@ruddr.io

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