Declaring a variable with the NOT NULL constraint incurs a small performance cost - while this constraint may not really be required. Using such a constraint should be avoided.


== Noncompliant Code Example

----
DECLARE
  counter PLS_INTEGER NOT NULL := 0; -- Noncompliant
BEGIN
  NULL;
END;
/
----


== Compliant Solution

----
DECLARE
  counter PLS_INTEGER := 0; -- Compliant
BEGIN
  NULL;
END;
/
----

