Question

I have created a sequence starting with 1 with no max value
I have created a trigger for primary key insertion automatically which is below
I have also set a constraint for the table where primary key must be unique and not null

create trigger MY_TEMP_TRIGGER
before insert on MY_TEMP
for each row

BEGIN

  SELECT MY_TEMP_SEQ.nextval 
    INTO :new.Id 
    FROM DUAL;

END;
/

INSERT INTO my_temp  
  (Id,Type, CreateDT, TypeId, TempType, DevType, Msg, File,User, Src, SrcDev)   
VALUES
 (MY_TEMP_SEQ.nextval,3434,2843,2453,2392,435,2390,'pension.txt','rereee',454545,3434)

Result:

ERROR at line 1:
ORA-00001: unique constraint (USER.PK_MY_TEMP) violated

The table MY_TEMP already contains values starting from 1 to 338 fro Id field

So,how should i handle this in triggers and in my insert statements.

Answer 1

You can increment your sequence before you install the trigger:

declare 
  v_max_id my_temp.id%type;
  v_curr_seq  NUMBER;
begin
  select max(id) into v_max_id from my_temp;

  loop
    select MY_TEMP_SEQ.nextval into v_curr_seq from dual;
    exit when v_curr_seq >= v_max_id;
  end loop;
end;
/