Question

Bulk load on table with trigger taking long time

Asked by: mjimison1956

I have a bulk load that is updating a table.  there is a trigger on the table which fires and updates a "history" table in another schema.  

My question is:   When this trigger fires does the entire row get updated or only the where condition fields in the row?

CREATE OR REPLACE TRIGGER "U_CASHEXPECTEDENTRY"
    AFTER UPDATE OF ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM ON "NIS1".CASHEXPECTEDENTRY
    REFERENCING OLD AS OLD NEW AS NRW
FOR EACH ROW
BEGIN
 IF :NRW.REALEVENT_DTM IS NOT NULL
 THEN
     UPDATE  "NIS1H".CASHEXPECTEDENTRY
     SET
     END_REALEVENT_DTM = :NRW.REALEVENT_DTM
     WHERE
     CASHEXPECTEDENTRY_ID=:OLD.CASHEXPECTEDENTRY_ID
     AND
     REALEVENT_DTM = :OLD.REALEVENT_DTM AND
     END_REALEVENT_DTM is NULL;
     INSERT INTO  "NIS1H".CASHEXPECTEDENTRY
     (
        ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM
     )
     VALUES
     (
         :NRW.ACTGMETHOD_ID,:NRW.CASHAMNT,:NRW.CASHEXPECTEDENTRY_ID,:NRW.CASHONQUANTITY_DTM,:NRW.CASHOUTSTANDING,:NRW.CASHRECONCASHTYPE_ID,:NRW.CASHRECONREASON_ID,:NRW.CREATED_BY,:NRW.CREATED_DTM,:NRW.END_REALEVENT_DTM,:NRW.EXPECTEDPAYMENT_DTM,:NRW.EXPECTED_REALEVENT_DTM,:NRW.LEDGERENTRY_ID,:NRW.LEDGERLINE_ID,:NRW.LOT_ID,:NRW.MODIFIED_BY,:NRW.MODIFIED_DTM,:NRW.PERCENTAGELEDGERLINE,:NRW.REALEVENTHIST_ID,:NRW.REALEVENT_DTM,:NRW.RECONCILED_REALEVENT_ID,:NRW.SECURITY_ID,:NRW.SETTLEMENT_DTM
     );
 END IF;
END;
/
SHOW ERRORS;

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Asked On
2008-09-02 at 10:10:42ID23696681
Topics

PL / SQL

,

Oracle Database

Participating Experts
1
Points
500
Comments
5

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Answers

 

by: GGuzdziolPosted on 2008-09-02 at 23:55:36ID: 22374664

Maybe you could move the condition from trigger's body to WHEN clause. It would allow you to avoid trigger's execution when NRW.REALAVENT_DTM IS NULL. So

Instead of
 
CREATE OR REPLACE TRIGGER "U_CASHEXPECTEDENTRY"
    AFTER UPDATE OF ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM ON "NIS1".CASHEXPECTEDENTRY
    REFERENCING OLD AS OLD NEW AS NRW
FOR EACH ROW
BEGIN
 IF :NRW.REALEVENT_DTM IS NOT NULL
 
Probably you want
 
CREATE OR REPLACE TRIGGER "U_CASHEXPECTEDENTRY"
    AFTER UPDATE OF ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM ON "NIS1".CASHEXPECTEDENTRY
    REFERENCING OLD AS OLD NEW AS NRW
FOR EACH ROW
WHEN (
  NRW.REALEVENT_DTM IS NOT NULL
)
BEGIN
                                              
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by: mjimison1956Posted on 2008-09-03 at 06:48:44ID: 22377128

Good point.  I think each time the trigger fires it is inserting to every column in the row.  Or does the condition only insert to the fields effected.  I am clueless.  Thanks for any help.

 

by: GGuzdziolPosted on 2008-09-03 at 07:03:56ID: 22377299

Only fields listed to be updated are updated. So your trigger updates only END_REALEVENT_DTM.
For the insert - for columns listed in <columns list> INSERT INTO table (<columns list>) , corresponding values are inserted. For others, if there is default on them - it is used. For others NULL is inserted.

To gain performance maybe you could:
- disable the trigger
- run update
- update tables in the other schema
- enable the trigger

 

by: mjimison1956Posted on 2008-09-04 at 07:06:08ID: 22387444

So in the example recommended above I do not have to have all the syntax after begin?  
Please give me a boiler plate of this one completely so I can try it.  Like I said, not experienced dba.  Thanks.

CREATE OR REPLACE TRIGGER "U_CASHEXPECTEDENTRY"
    AFTER UPDATE OF ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM ON "NIS1".CASHEXPECTEDENTRY
    REFERENCING OLD AS OLD NEW AS NRW
FOR EACH ROW
BEGIN
 IF :NRW.REALEVENT_DTM IS NOT NULL

 

by: GGuzdziolPosted on 2008-09-04 at 07:50:39ID: 22388031

CREATE OR REPLACE TRIGGER "U_CASHEXPECTEDENTRY"
    AFTER UPDATE OF ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM ON "NIS1".CASHEXPECTEDENTRY
    REFERENCING OLD AS OLD NEW AS NRW
FOR EACH ROW
WHEN (
  NRW.REALEVENT_DTM IS NOT NULL
)
BEGIN
     UPDATE  "NIS1H".CASHEXPECTEDENTRY
     SET
     END_REALEVENT_DTM = :NRW.REALEVENT_DTM
     WHERE
     CASHEXPECTEDENTRY_ID=:OLD.CASHEXPECTEDENTRY_ID
     AND
     REALEVENT_DTM = :OLD.REALEVENT_DTM AND
     END_REALEVENT_DTM is NULL;
     INSERT INTO  "NIS1H".CASHEXPECTEDENTRY
     (
        ACTGMETHOD_ID,CASHAMNT,CASHEXPECTEDENTRY_ID,CASHONQUANTITY_DTM,CASHOUTSTANDING,CASHRECONCASHTYPE_ID,CASHRECONREASON_ID,CREATED_BY,CREATED_DTM,END_REALEVENT_DTM,EXPECTEDPAYMENT_DTM,EXPECTED_REALEVENT_DTM,LEDGERENTRY_ID,LEDGERLINE_ID,LOT_ID,MODIFIED_BY,MODIFIED_DTM,PERCENTAGELEDGERLINE,REALEVENTHIST_ID,REALEVENT_DTM,RECONCILED_REALEVENT_ID,SECURITY_ID,SETTLEMENT_DTM
     )
     VALUES
     (
         :NRW.ACTGMETHOD_ID,:NRW.CASHAMNT,:NRW.CASHEXPECTEDENTRY_ID,:NRW.CASHONQUANTITY_DTM,:NRW.CASHOUTSTANDING,:NRW.CASHRECONCASHTYPE_ID,:NRW.CASHRECONREASON_ID,:NRW.CREATED_BY,:NRW.CREATED_DTM,:NRW.END_REALEVENT_DTM,:NRW.EXPECTEDPAYMENT_DTM,:NRW.EXPECTED_REALEVENT_DTM,:NRW.LEDGERENTRY_ID,:NRW.LEDGERLINE_ID,:NRW.LOT_ID,:NRW.MODIFIED_BY,:NRW.MODIFIED_DTM,:NRW.PERCENTAGELEDGERLINE,:NRW.REALEVENTHIST_ID,:NRW.REALEVENT_DTM,:NRW.RECONCILED_REALEVENT_ID,:NRW.SECURITY_ID,:NRW.SETTLEMENT_DTM
     );
END;
/
SHOW ERRORS;

                                              
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