Currently on_sql for merge is not documented. Instead join_sql should be used.
In its current behavior it replaces the whole join condition.
This is wrong, it should behave like on normal joins and just add an additional join restriction to the default column joins.
Currently
on_sql
for merge is not documented. Insteadjoin_sql
should be used.In its current behavior it replaces the whole join condition. This is wrong, it should behave like on normal joins and just add an additional join restriction to the default column joins.