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Etsuro Fujita 5a20b0219e Fix handling of multiple AFTER ROW triggers on a foreign table. ... AfterTriggerExecute() retrieves a fresh tuple or pair of tuples from a tuplestore and then stores the tuple(s) in the passed-in slot(s) if AFTER_TRIGGER_FDW_FETCH, while it uses the most-recently-retrieved tuple(s) stored in the slot(s) if AFTER_TRIGGER_FDW_REUSE. This was done correctly before 12, but commit ff11e7f4b broke it by mistakenly clearing the tuple(s) stored in the slot(s) in that function, leading to an assertion failure as reported in bug #16139 from Alexander Lakhin. Also, fix some other issues with the aforementioned commit in passing: * For tg_newslot, which is a slot added to the TriggerData struct by the commit to store new updated tuples, it didn't ensure the slot was NULL if there was no such tuple. * The commit failed to update the documentation about the trigger interface. Author: Etsuro Fujita Backpatch-through: 12 Discussion: https://postgr.es/m/16139-94f9ccf0db6119ec%40postgresql.org		6 years ago
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postgres_fdw.sql	Fix handling of multiple AFTER ROW triggers on a foreign table.	6 years ago