Add isolation tests for the combination of EPQ and triggers.

As evidenced by bug #16036 this area is woefully under-tested. Add fairly extensive tests for the combination. Backpatch back to 9.6 - before that isolationtester was not capable enough. While we don't backpatch tests all the time, future fixes to trigger.c would potentially look different enough in 12+ from the earlier branches that introducing bugs during backpatching is more likely than normal. Also, it's just a crucial and undertested area of the code. Author: Andres Freund Discussion: https://postgr.es/m/16036-28184c90d952fb7f@postgresql.org Backpatch: 9.6-, the earliest these tests work

Add isolation tests for the combination of EPQ and triggers.
As evidenced by bug #16036 this area is woefully under-tested. Add fairly extensive tests for the combination. Backpatch back to 9.6 - before that isolationtester was not capable enough. While we don't backpatch tests all the time, future fixes to trigger.c would potentially look different enough in 12+ from the earlier branches that introducing bugs during backpatching is more likely than normal. Also, it's just a crucial and undertested area of the code. Author: Andres Freund Discussion: https://postgr.es/m/16036-28184c90d952fb7f@postgresql.org Backpatch: 9.6-, the earliest these tests work
c8841199 · Andres Freund · d986d4e8 · c8841199 · c8841199 · c8841199
Commit c8841199 authored Oct 04, 2019 by Andres Freund
3 changed files
--- a/src/test/isolation/expected/eval-plan-qual-trigger.out
+++ b/src/test/isolation/expected/eval-plan-qual-trigger.out
--- a/src/test/isolation/isolation_schedule
+++ b/src/test/isolation/isolation_schedule
@@ -29,6 +29,7 @@ test: fk-deadlock2
 test: fk-partitioned-1
 test: fk-partitioned-2
 test: eval-plan-qual
+test: eval-plan-qual-trigger
 test: lock-update-delete
 test: lock-update-traversal
 test: inherit-temp

--- a/src/test/isolation/specs/eval-plan-qual-trigger.spec
+++ b/src/test/isolation/specs/eval-plan-qual-trigger.spec