allow raw on conflict statement

[maglnet]

Signed-off-by: Matthias Glaub maglnet@users.noreply.github.com

I had the case where I needed to merge jsonb values done within the ON CONFLICT clause.
e.g.:

ON CONFLICT (time, location) UPDATE SET data = original.data::jsonb || excluded.data::jsonb

With the provided PR this is now possible as follows:

 CALL decompress_backfill(
                staging_table=>'temp_staging',
                destination_hypertable=> 'original',
                on_conflict_action=>  'UPDATE_RAW',
                on_conflict_target=> '(time, location)',
                on_conflict_update_columns=> ARRAY['data = original.data || excluded.data::jsonb']
            );

[CLAassistant]

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