Hello,
It seems there is bug in table-per-class inheritance. I have this herarchy:
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
class Car1 {
int maxSpeed
}
@Inheritance(strategy=InheritanceType.SINGLE_TABLE)
class Car2 {..} extends Car1
@Inheritance(strategy=InheritanceType.TABLE_PER_CLASS)
class Car3{..} extends Car2
Car1 and Car2 are stored in the same table, Car3 is in separated table.
I can run queries:
SELECT c FROM Car1 c3 (returns even Car3 instances)
And also query with condition
SELECT c3 FROM Car3 c3 WHERE c3.maxSpeed > 300
But query on root class fails with an SQL error exception (Derby
database). OpenJPA generated SQL query with __empty FROM part__, table
name is simply missing.
JPQL query:
SELECT c FROM Car1 c WHERE c.maxSpeed > 300
I traced this problem, SQL query for first table (Car1) was executed
properly, OpenJPA failed on second query from table Car3.
Have someone alse discovered this bug, where should I put it?
Regards,
Jan Kotek
