There's some extended discussion of the issue on the wiki[1]. A future full MERGE implementation might have slightly different semantics or performance characte

There's some extended discussion of the issue on the wiki[1]. A future full MERGE implementation might have slightly different semantics or performance characteristics than ON CONFLICT (which might also differ from other DBMS). [1] https://wiki.postgresql.org/wiki/UPSERT#SQL_MERGE_syntax https://wiki.postgresql.org/wiki/UPSERT#SQL_MERGE_syntax