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 ------ master Details ------- https://git.postgresql.org/pg/commitdiff/177037341a4414f1089748686af9ce8bd9f8d383 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(+)
