SP2-0552: Bind Variable "NEW" is not declared - sql

Question

I am trying to learn pl/sql triggers. I am trying to create a simple trigger by tracking tutorial http://www.tutorialspoint.com/plsql/plsql_triggers.htm but I got below error. I searched on the internet but could not find the solution. Could you help me on this issue?
CREATE OR replace TRIGGER display_salary_changes
BEFORE DELETE OR INSERT OR UPDATE ON ok.customers
FOR EACH ROW
DECLARE
sal_diff NUMBER;
BEGIN
sal_diff := :NEW.salary - :OLD.salary;
END;
/
Trıgger DISPLAY_SALARY_CHANGES created.
SP2-0552: Bind Variable "NEW" is not declared.
PL/SQL procedure successfully completed.
Edit: I am using Sql Developer Version 4.1.1

Answer 1

Works for me (example from your link, but it's basically the same as your post):
SQL> create table demo (id integer, salary number);
Table created.
SQL> create or replace trigger display_salary_changes
2 before delete or insert or update on demo
3 for each row
4 when (new.id > 0)
5 declare
6 sal_diff number;
7 begin
8 sal_diff := :new.salary - :old.salary;
9 dbms_output.put_line('Old salary: ' || :old.salary);
10 dbms_output.put_line('New salary: ' || :new.salary);
11 dbms_output.put_line('Salary difference: ' || sal_diff);
12 end;
13 /
Trigger created.
SQL> show errors
No errors.
SQL> insert into demo (id, salary) values (1, 100);
Old salary:
New salary: 100
Salary difference:
1 row created.
SQL> update demo set salary = salary * 1.1 where id = 1;
Old salary: 100
New salary: 110
Salary difference: 10
1 row updated.
In your example it shows
Trıgger DISPLAY_SALARY_CHANGES created.
which doesn't look like SQL*Plus output. What tool did you use?
After that it gives a SQL*Plus SP2-0552 error about an undefined bind variable, followed by
PL/SQL procedure successfully completed.
What procedure was that? I suspect this is the output from a script with some other step that is failing after the trigger is created.
Is the trigger valid? You can normally right-click and check properties in desktop tools, or at the SQL*Plus prompt enter
show errors trigger display_salary_changes

Answer 2

Try this:
CREATE OR replace TRIGGER test_trg
BEFORE DELETE OR INSERT OR UPDATE ON test
FOR EACH ROW
DECLARE
sal_diff NUMBER;
BEGIN
sal_diff := :new.d - :old.d;
END;
/

Answer 3

Can you please check you column name. I have tried your code below and I got output.
create table test
(
no number(10),
sal number(10)
);
CREATE OR replace TRIGGER test_tr
BEFORE DELETE OR INSERT OR UPDATE ON test
FOR EACH ROW
DECLARE
sal_diff NUMBER;
BEGIN
sal_diff := :NEW.sal - :OLD.sal;
dbms_output.put_line(sal_diff);
END;
/
insert into test values(1,100);
update test set sal=200 where no=1;
Output :
1 rows inserted.
4 rows updated.
100
100
100
100
1 rows inserted.

Answer 4

I think it is missing the "REFERENCING NEW AS NEW OLD AS OLD" sentence:
CREATE TRIGGER [trigger_name]
BEFORE INSERT OR UPDATE ON [table_name]
REFERENCING NEW AS NEW OLD AS OLD
FOR EACH ROW