Details
Minor Description
When query cache is enabled:
<property name="openjpa.jdbc.QuerySQLCache" value="true"/>
If a query containing a BETWEEN expression is executed multiple times with different parameter values, the parameter values can persist across queries.
Example:
//Query1
String jpql2 = "SELECT e FROM Employee e WHERE :baseDate between e.startDate AND e.endDate";
TypedQuery<Employee> q1 = em.createQuery(jpql2, Employee.class);
q1.setParameter("baseDate", new GregorianCalendar(2016, Calendar.JUNE, 1).getTime());
q1.getResultList();
//Query2
TypedQuery<Employee> q2 = em.createQuery(jpql2, Employee.class);
q2.setParameter("baseDate", new GregorianCalendar(2017, Calendar.JUNE, 1).getTime());
q2.getResultList();
Produces the following queries:
Q1:
SELECT t0.id, t0.endDate, t0.hireStatus, t0.isManager, t0.name, t0.startDate, t0.status
FROM EMPLOYEE_PQC t0
WHERE (? >= t0.startDate AND ? <= t0.endDate)
[params=(Timestamp) 2016-06-01 00:00:00.0, (Timestamp) 2016-06-01 00:00:00.0]
Q2:
SELECT t0.id, t0.endDate, t0.hireStatus, t0.isManager, t0.name, t0.startDate, t0.status
FROM EMPLOYEE_PQC t0
WHERE (? >= t0.startDate AND ? <= t0.endDate)
[params=(Timestamp) 2017-06-01 00:00:00.0, (Timestamp) 2016-06-01 00:00:00.0]
As you can see, the cached parameter for the endDate has persisted from the first query's parameters.