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create or replace function update_game_time() returns trigger as

$BODY$

begin

	if TG_OP = 'INSERT' then

		if NEW.status = 'finished'::game_status then

			NEW.played_date = current_timestamp;

		end if;

	elsif TG_OP = 'UPDATE' then

		if OLD.status != NEW.status AND NEW.status = 'finished'::game_status then

			NEW.played_date = current_timestamp;

		end if;

	end if;



	return NEW;

end;

$BODY$ language 'plpgsql';



drop trigger if exists t_update_game_time on games;



create trigger t_update_game_time

before insert or update

on games

for each row

execute procedure update_game_time();