select sum(CASE x WHEN x THEN 1 ELSE 0 ) returns String instead of Long.

It seems that a few operations in JDBCExpressionFactory often calls getLiteralRawString which destroys the information about any real types in a query and replaces it with a Raw which is always of type java.lang.String.

This breaks the following query, which wrongly returns a string instead of a Long:

final TypedQuery<Long> q 
   = em.createQuery("select SUM(CASE ae.stringVal WHEN 'bare' THEN 1 ELSE 0 END) from AggEntity AS ae", Long.class);
final Long sumC = q.getSingleResult();

This only affects us since I fixed UnaryOp to not return the native JDBC vendor type of a given column but uses the val.getType()