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Database - Interview Questions and Answers for 'Constraintviolationexception' - 2 question(s) found - Order By Newest

 Q1. What do you make out of this error

org.hibernate.exception.ConstraintViolationException: could not insert: [<Entity>]
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (<Constraint Name>) violated

and how would you go about debugging it ?
Database2017-03-22 13:12:50

Ans. Application is unable to insert a record as it violates a unique constraint.

The exception states the constraint and Table can be located by the Entity mapping. So I will go to the DB and will first check to which all columns the unique constraint applies. And then I will go and check the code and logs to see how come the duplicate column values were attempted to be inserted when they were not supposed to be.

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 Q2. What is ConstraintViolationException in Hibernate ?Hibernate2017-03-22 13:13:33

Ans. The exception is thrown when a database constraint is violated.

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 What do you make out of this error

org.hibernate.exception.ConstraintViolationException: could not insert: [<Entity>]
Caused by: java.sql.SQLIntegrityConstraintViolationException: ORA-00001: unique constraint (<Constraint Name>) violated

and how would you go about debugging it ?
 What are the different database constraint types ?



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