CREATE INDEX request_response_partition_idx
ON public.request_response_partition USING btree (userid,extract('Month' from time_stamp));
Я получаю ошибку;
ERROR: functions in index expression must be marked IMMUTABLE
********** Error **********
ERROR: functions in index expression must be marked IMMUTABLE
SQL state: 42P17
time_stamp
? - person a_horse_with_no_name   schedule 20.01.2020