SQL

postgres audit table

create function tg_audit_dist_shard() returns trigger
    language plpgsql
as
$$
DECLARE
    audit_entry int := nextval('audit_entry_seq'::regclass);
BEGIN
    IF (TG_OP = 'INSERT') THEN
        INSERT INTO dist_shard_audit
        VALUES (now(), audit_entry, TG_OP::audit_action, TG_RELID::regclass, NEW.*);
        RETURN NEW;
    ELSIF (TG_OP = 'UPDATE') THEN
        INSERT INTO dist_shard_audit
        VALUES (now(), audit_entry, 'UPDATE_OLD'::audit_action, TG_RELID::regclass, OLD.*),
               (now(), audit_entry, 'UPDATE_NEW'::audit_action, TG_RELID::regclass, NEW.*);
    ELSIF (TG_OP = 'DELETE') THEN
        INSERT INTO dist_shard_audit
        VALUES (now(), audit_entry, TG_OP::audit_action, TG_RELID::regclass, OLD.*);
        RETURN OLD;
    END IF;
    RETURN NULL;
END;
$$;