[hibernate-dev] SQM and cast targets

[Christian Beikov]

Sounds good, although I guess there might be cases when ONLY this 
approach won't work that well.

I am specifically thinking about casts to the various character types 
that are available in the different DBMS. A cast to "String" might work 
most of the time, but we should still have an option to cast to CLOB, 
TEXT or whatever other datatype a DBMS offers.


Mit freundlichen Grüßen,
------------------------------------------------------------------------
*Christian Beikov*
Am 29.05.2017 um 16:17 schrieb Steve Ebersole:
> Currently casting in HQL is under-defined and open-ended (and therefore
> pretty inconsistent).  What does that mean?  Well, what is a valid cast
> target in HQL?  There really is not a defined
> answer to that.
>
> I'd like to start formalizing the answer to this.
>
> Specifically, I am thinking this should be defined around
> JavaTypeDescriptor.  So that we'd understand any Java type registered with
> with JavaTypeDescriptorRegistry, and specifically any that properly
> implements `#getJdbcRecommendedSqlType` (using the Dialect to resolve the
> cast target in the generated SQL).
>
> Anyone have objections to this?  Thoughts?
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