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_15_STABLE Details ------- https://git.postgresql.org/pg/commitdiff/8bfaae6fb20cf3029f42f2760f9d90a84e4448d7 Modified Files -------------- src/backend/executor/nodeModifyTable.c | 5 +++++ src/test/isolation/expected/merge-update.out | 25 +++++++++++++++++++++++++ src/test/isolation/specs/merge-update.spec | 2 ++ 3 files changed, 32 insertions(+)
