What is wrong with this sequence, it does not work when, after 3 inserts, I add a new record with the trigger it gives an error.
Mr President.
What is wrong with this sequence, it does not work when, after 3 inserts, I add a new record with the trigger it gives an error.
--SL_CUSTOMERS table data INSERT INTO SL_CUSTOMERS VALUES(1,'Kamrul Hasan',NULL,NULL,'Moghbazar', 'Dhaka','0456789123',NULL,NULL,NULL,'Y',NULL); INSERT INTO SL_CUSTOMERS VALUES(2,'Rabiul Alam',NULL,NULL,'Motijheel', 'Dhaka','0567891234',NULL,NULL,NULL,'Y',NULL); INSERT INTO SL_CUSTOMERS VALUES(3,'Shahed Hasan',NULL,NULL,'2-G/1,2-2,Mirpur', 'Dhaka','0678912345',NULL,NULL,NULL,'Y',NULL);
CREATE SEQUENCE "ALIZA"."SL_CUSTOMERS_SEQ" MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 NOCACHE NOORDER NOCYCLE ; CREATE OR REPLACE TRIGGER SL_CUSTOMERS_TRG BEFORE INSERT ON "ALIZA"."SL_CUSTOMERS" FOR EACH ROW BEGIN IF :NEW.CUSTOMER_ID IS NULL OR :NEW.CUSTOMER_ID < 0 THEN SELECT SL_CUSTOMERS_SEQ.nextval INTO :NEW.CUSTOMER_ID FROM DUAL; END IF; END; /
When I try to insert several records with the seq.nextval it gives error
violation of primary key.
INSERT INTO "ALIZA"."SL_CUSTOMERS" (CUSTOMER_NAME) VALUES ('sdfsd') ORA-00001: unique constraint (ALIZA.SL_CUSTOMERS_PK) violated ORA-06512: at line 1 One error saving changes to table "ALIZA"."SL_CUSTOMERS": Row 4: ORA-00001: unique constraint (ALIZA.SL_CUSTOMERS_PK) violated ORA-06512: at line 1
Concerning
Mr President.
I find the solution by creating a function before the triiger
as below
CREATE SEQUENCE "ALIZA"."SL_CUSTOMERS_SEQ" MINVALUE 1 MAXVALUE 9999999999999999999999999999 INCREMENT BY 1 START WITH 1 NOCACHE NOORDER NOCYCLE ; CREATE OR REPLACE FUNCTION get_SL_CUSTOMERS_vId RETURN VARCHAR2 AS BEGIN RETURN SL_CUSTOMERS_SEQ.NEXTVAL; END; / CREATE OR REPLACE TRIGGER SL_CUSTOMERS_TRG BEFORE INSERT ON "ALIZA"."SL_CUSTOMERS" FOR EACH ROW DECLARE dummy VARCHAR2(200); BEGIN dummy := get_SL_CUSTOMERS_vId(); :NEW.CUSTOMER_ID := dummy; END; /
It works very well
Thank you all for the suggestions.
Concerning
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