CREATE USER prometheus;
ALTER USER prometheus SET SEARCH_PATH TO prometheus,pg_catalog;

CREATE SCHEMA prometheus AUTHORIZATION prometheus;

CREATE FUNCTION prometheus.f_select_pg_stat_activity()
    RETURNS setof pg_catalog.pg_stat_activity
    LANGUAGE sql
    SECURITY DEFINER
AS $$
SELECT * from pg_catalog.pg_stat_activity;
$$;

CREATE FUNCTION prometheus.f_select_pg_stat_replication()
    RETURNS setof pg_catalog.pg_stat_replication
    LANGUAGE sql
    SECURITY DEFINER
AS $$
SELECT * from pg_catalog.pg_stat_replication;
$$;

CREATE VIEW prometheus.pg_stat_replication
AS
SELECT * FROM prometheus.f_select_pg_stat_replication();

CREATE VIEW prometheus.pg_stat_activity
AS
SELECT * FROM prometheus.f_select_pg_stat_activity();

GRANT SELECT ON prometheus.pg_stat_replication TO prometheus;
GRANT SELECT ON prometheus.pg_stat_activity TO prometheus;