CREATE TABLE log_events (
    log_id                          INTEGER         CONSTRAINT nn_log_events_log_id NOT NULL,
    log_parent                      INTEGER,
    app_id                          NUMBER(4,0)     CONSTRAINT nn_log_events_app_id NOT NULL,
    page_id                         NUMBER(6,0)     CONSTRAINT nn_log_events_page_id NOT NULL,
    user_id                         VARCHAR2(30)    CONSTRAINT nn_log_events_user_id NOT NULL,
    session_id                      INTEGER         CONSTRAINT nn_log_events_session_id NOT NULL,
    event_id                        VARCHAR2(30)    CONSTRAINT nn_log_events_event_id NOT NULL,
    event_value                     NUMBER,
    created_at                      DATE            CONSTRAINT nn_log_events_created_at NOT NULL,
    --
    CONSTRAINT pk_log_events
        PRIMARY KEY (log_id),
    --
    CONSTRAINT fk_log_events_event_id
        FOREIGN KEY (app_id, event_id)
        REFERENCES events (app_id, event_id),
    --
    CONSTRAINT fk_log_events_users
        FOREIGN KEY (user_id)
        REFERENCES users (user_id) DISABLE
);
--
COMMENT ON TABLE log_events IS '[CORE] List of business events';
--
COMMENT ON COLUMN log_events.log_id         IS 'Log ID';
COMMENT ON COLUMN log_events.log_parent     IS 'Referenced log_id from LOGS table';
COMMENT ON COLUMN log_events.app_id         IS 'App';
COMMENT ON COLUMN log_events.page_id        IS 'Page';
COMMENT ON COLUMN log_events.user_id        IS 'User';
COMMENT ON COLUMN log_events.session_id     IS 'Session id';
COMMENT ON COLUMN log_events.event_id       IS 'Event code from EVENTS table';
COMMENT ON COLUMN log_events.event_value    IS 'Optional business value';
COMMENT ON COLUMN log_events.created_at     IS 'Datetime of the event';