Hi. v13 works fine. all tests passed. The code is very intuitive. played with multi WHEN clauses, even with before/after row triggers, work as expected.
I don't know when replace_outer_merging will be invoked. even set a breakpoint on it. coverage shows replace_outer_merging only called once. sql-merge.html miss mentioned RETURNING need select columns privilege? in sql-insert.html, we have: "Use of the RETURNING clause requires SELECT privilege on all columns mentioned in RETURNING. If you use the query clause to insert rows from a query, you of course need to have SELECT privilege on any table or column used in the query." I saw the change in src/sgml/glossary.sgml, So i looked around. in the "Materialized view (relation)" part. "It cannot be modified via INSERT, UPDATE, or DELETE operations.". Do we need to put "MERGE" into that sentence? also there is SELECT, INSERT, UPDATE, DELETE, do we need to add a MERGE entry in glossary.sgml?
