Re: TRAP: FailedAssertion("HaveRegisteredOrActiveSnapshot()", File: "toast_internals.c", Line: 670, PID: 19403)

On Mon, Apr 18, 2022 at 4:07 PM Tom Lane  wrote:
> There may be some corner cases that aren't described by any of these
> three blanket scenarios, but they've got to be pretty few and far
> between.

My first thought whenever anything like this comes up is cursors,
especially but not only holdable cursors. Also, plpgsql variables,
maybe mixed with embedded COMMIT/ROLLBACK. I don't find it
particularly hard to believe we have some bugs in
insufficiently-well-considered parts of the system that pass around
datums outside of the normal executor flow, but I don't know exactly
how to find them all, either.

-- 
Robert Haas
EDB: http://www.enterprisedb.com