java.lang.IllegalStateException: current CallableStatement ou was not a ResultSet, but getResultList was called
The error message “java.lang.IllegalStateException: current CallableStatement ou was not a ResultSet, but getResultList was called” typically occurs when you are trying to retrieve data from a stored procedure or database function using getResultList(). This method is typically used for retrieving results from a query, not for executing stored procedures or functions.
Example:
EntityManager entityManager = entityManagerFactory.createEntityManager();
StoredProcedureQuery query = entityManager.createStoredProcedureQuery("your_stored_procedure");
// Set input parameters (if any)
query.registerStoredProcedureParameter("inputParam1", String.class, ParameterMode.IN);
query.setParameter("inputParam1", "some_value");
// Execute the stored procedure
query.execute();
// Attempt to retrieve results using getResultList() - This is where the error occurs
List<Object[]> results = query.getResultList();In the above example, we are trying to retrieve the results of a stored procedure using getResultList(). However, since stored procedures do not return a result set, calling getResultList() will throw the IllegalStateException.
Solution:
To fix this error, you need to make sure that you are using the correct method to retrieve results from a stored procedure or function. If your stored procedure or function is not returning a result set, you can use the execute() method to execute it without attempting to retrieve any results.
// Execute the stored procedure without expecting results
query.execute();If your stored procedure or function does return a result set, you need to use the correct method to retrieve the results. In JPA, you can use getResultList() for queries that return multiple rows, and getSingleResult() for queries that return a single row.
// Execute the stored procedure
query.execute();
// Retrieve results using getResultList()
List<Object[]> results = query.getResultList();