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Rule description

• Constraints should not be applied to types that cannot be constrained

Non-compliant Code Example

Create TABLE EMPLOYEE 
(
  EMP_ID number(10) NOT NULL,
  FIRSTNAME NVARCHAR2(75),
  LASTNAME NVARCHAR2(75),
  DEPT_ID int,  
  ADDRESS NVARCHAR2(250) NOT NULL,
  Photo blob(300),  --Non compliant code

  CONSTRAINT employee_pk PRIMARY KEY (EMP_ID)
);

Compliant Code Example

Create TABLE EMPLOYEE
(
  EMP_ID number(10) NOT NULL,
  FIRSTNAME NVARCHAR2(75),
  LASTNAME NVARCHAR2(75),
  DEPT_ID int,  
  ADDRESS NVARCHAR2(250) NOT NULL,
  Photo blob(), --Compliant code

  CONSTRAINT employee_pk PRIMARY KEY (EMP_ID)
);