On 2020-05-05 18:05, Robert Haas wrote:
This reminds me: I think that the issues in http://postgr.es/m/ca+tgmoyafyrrdrz94p_qdt+1oong6smovbkghkvsftoncrf...@mail.gmail.com should be considered here - we should guarantee that there's a snapshot registered continuously from before the call to SearchSysCache1 until after the call to CatalogTupleDelete. In the systable_beginscan case, we should be fine as long as the systable_endscan follows the CatalogTupleDelete call.
I considered this, but it seems independent of my patch. If there are changes to be made, there are now fewer places to fix up.
-- Peter Eisentraut http://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
