[hibernate-dev] How to deal with a constant in CriteriaQuery

[Steve Ebersole]

On Tue, Apr 24, 2018 at 5:43 PM Christian Beikov <christian.beikov at gmail.com>
wrote:

> That's a possibility indeed, but there will most likely always be some
> nice function that uses a weird keyword syntax for which there is no
> first class support.
>

And not only that but some databases allow extensions to the SQL spec as to
what can be extracted.  So using an enum is nice, but limiting



> So even if we propose this, IMO we should still also propose to add a
> note to the function invocation syntax section, that a function may
> resolve to a JPA vendor defined funciton as well. This would be like a
> "last resort" to use a function at least in a "standard way". If the JPA
> vendor doesn't define the desired function, it's up to the user to
> making use of JPA vendor specific APIs for registering the function.
>

I'm not sure what this means