Question

Currently, I have a table that has a column which has a datatype enum. My question is can I execute a IN query on this column?

For example:

enum Gender { MALE, FEMALE, GAY };
Table Student (
  String name;
  Gender gender;
)

Can I execute:

SELECT * FROM Student WHERE gender IN ('MALE', 'FEMALE');

Note that I use string as the parameter for in, but I’m getting:

Caused by: java.lang.IllegalArgumentException: Parameter value [('MALE')] did not match expected type [Gender]

Is there a workaround on this issue?

Thanks,

czetsuya

Answer 1

Since string values are not recognised, execute the following code (Assuming you have used Enum with default EnumType):

SELECT * FROM Student WHERE gender IN (0,1);

If using EnumType.String

Query query = session.createQuery(
    "SELECT s FROM Student s WHERE s.gender=:g1 or s.gender=:g2");
query.setParameter("g1", Gender.MALE);
query.setParameter("g2", Gender.FEMALE);