Accessing the dicriminator column

[mikado82]

Hello everybody, I hope this is the right forum for my question, so here it is:
I've wondered if there's any way to directly access the discriminator column in a query.
One could use the a query like "from SubClass1EntityBean..." to retrieve entities of a specific subtype, but this won't help in my situation.

Thanks

[mikado82]

To make it clearer, I would like to have a query like this:
"from SomeEntityBean b WHERE b.parent.discriminatorColumn = :discriminatorValue"

[rbenko]

I'm also looking for this functionality - anyone???

[tefron]

assuming that you mean with hibernate...

You can add a read-only property to your hbm mapping file with the column attribute set to the same name as the discriminator column.
e.g.





good luck.

[rbenko]

Yes, I actually figured out this rather simple (and obvious!) workaround just after I posted - thanks for the info.

[tefron]

In most cases you don't need this property, all you have to do is "find-select" on the sub-class. We needed to use it when we had a collectioin of parent class objects that contain mix of sub-classes items and we needed to select objects of one sub-class.