195 Rules Manager Types

Summary of Rule Manager Types

Table 195-1 describes the Rules Manager object type.

RLM$EVENTIDS Object Type

The RLM$EVENTIDS type is defined as a table of VARCHAR2 values as follows:

Syntax

CREATE OR REPLACE TYPE RLM$EVENTIDS is table of VARCHAR2(38);

Attributes

None.

Usage Notes

RLM$EVENTIDS type is used to pass a list of event identifiers to the CONSUME_PRIM_EVENTS procedure. These event identifiers are ROWIDs for the corresponding events in the database and their values are available through the arguments of the action callback procedure and rule class results view columns, when the rule class is configured for RULE consumption policy.

Examples

The following commands show the body of the action callback procedure for a rule class configured for RULE consumption policy. This demonstrates the use of RLM$EVENTDIDS type to consume the events before executing the action for the matched rules.

CREATE OR REPLACE PROCEDURE PromoAction (
      Flt        AddFlight, 
      Flt_EvtId  ROWID,    --- rowid for the fligt primitive event
      Car        AddRentalCar, 
      Car_EvtId  ROWID, 
      rlm$rule   TravelPromotions%ROWTYPE) is 
 evtcnsmd   NUMBER; 
BEGIN
 evtcnsmd := dbms_rlmgr.consume_prim_events(
              rule_class   => 'TravelPromotions',
              event_idents => RLM$EVENTIDS(Flt_EvtId, Car_EvtId));

 IF (evtcnsmd = 1) THEN 
   -- consume operation was successful; perform the action ---
   OfferPromotion (Flt.CustId, rlm$rule.PromoType, rlm$rule.OfferedBy);
 END IF;
END;