[hibernate-dev] Dialect#remapSqlTypeDescriptor

Steve Ebersole steve at hibernate.org
Fri Sep 30 20:02:37 EDT 2016

We may be able to look at the procedures Metadata from CallableStatement.
I forget the exact details of how it reports the argument types, especially
for Oracle specifcally

On Fri, Sep 30, 2016, 12:57 PM Vlad Mihalcea <mihalcea.vlad at gmail.com>

> I also consider that we should provide info so that we can properly map
> the Boolean type according to the expected SQL type.
> Especially since we have revamped the support for Stored procedures and
> functions.
> Vlad
> On Fri, Sep 30, 2016 at 5:11 PM, Steve Ebersole <steve at hibernate.org>
> wrote:
>> TLDR: Should we adjust to allow Dialect to know the "context" of where the
>> remapping is requested?
>> Ah Oracle...
>> So this comes from the fact that Oracle does not support a BOOLEAN
>> datatype.  Well kind of.  It does not support a BOOLEAN datatype in its
>> "SQL engine".  However, in PL/SQL it does in fact support a BOOLEAN
>> datatype.  Which comes into play when we talk about calling functions and
>> procedures: the arguments and returns can in fact be a BOOLEAN.
>> As far as I know, Oracle is the only database with this type of
>> inconsistency in its type system.  But the question is whether we want to
>> pass along some kind of information regarding the context (SQL v function
>> v
>> procedure) to the Dialect#remapSqlTypeDescriptor.
>> You can look at https://hibernate.atlassian.net/browse/HHH-11141 for an
>> illustration of how this impacts applications.  And if you look through
>> the
>> comments you can see the kind-of-crazy workaround needed.
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