Requery does not currently use the column transformer when generating EXCLUDED column name in Postgres.

Therefore, when specifying a column transformer that makes the column name a snake case, Requery generate a SQL as bellow:

insert into test (id, message_title) values (?, ?) on conflict (id) do update set id = EXCLUDED.id, message_title = EXCLUDED.messageTitle

This query does not work well because the column name used in EXCLUDED clause wasn’t converted correctly (it must be a ‘message_title’, but is a ‘messageTitle’).

In my patch, I changed a UpsertOnConflictDoUpdate class to use a column transformer when generating EXCLUDED column names, so it generates a SQL as bellow:

insert into test (id, message_title) values (?, ?) on conflict (id) do update set id = EXCLUDED.id, message_title = EXCLUDED.message_title