Fix handling of updated tuples in the MERGE statement This branch missed the IsolationUsesXactSnapshot() check. That led to EPQ on repeatable read and serializable isolation levels. This commit fixes the issue and provides a simple isolation check for that. Backpatch through v15 where MERGE statement was introduced.
Reported-by: Tender Wang <[email protected]> Discussion: https://postgr.es/m/CAPpHfdvzZSaNYdj5ac-tYRi6MuuZnYHiUkZ3D-AoY-ny8v%2BS%2Bw%40mail.gmail.com Author: Tender Wang <[email protected]> Reviewed-by: Dean Rasheed <[email protected]> Backpatch-through: 15 Branch ------ REL_18_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/13fab378e630f73b7bb821a211f10b66bc696525 Modified Files -------------- src/backend/executor/nodeModifyTable.c | 5 +++++ src/test/isolation/expected/merge-update.out | 33 ++++++++++++++++++++++++++++ src/test/isolation/specs/merge-update.spec | 2 ++ 3 files changed, 40 insertions(+)
