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[Teneo] Properties from subclass added as not null to superclass table. [message #77414]

Thu, 29 March 2007 14:07

Duncan Alexander

Messages: 90
Registered: July 2009

Member

This is a multi-part message in MIME format.
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Hi Martin et al,

I am noticing an issue with multiple inheritance and Teneo whereby properties from a subclass are
being mapped into the superclass' table but set to NOT NULL. The result is that whenever a type is
inserted into the table which does not have a discriminator type of that specific subclass these
columns are NULL and an error is thrown from the DB.

- Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2

- Inheritance mapping is set to SINGLE_TABLE

- See attached diagram for model snippit

Looking in particular at CodedXSMeasure, this inherits from CodedMeasure and XSMeasure, CodedMeasure
is a Measure, which is a Component which in turn is an Identifiable. Identifiable is the main
class for this heirarchy and hence it maps to a table in the DB.

From what I understand the way Teneo handles multiple inheritance, the features which
CodedXSMeasure inherits from XSMeasure will be pulled into the subclass declaration for
CodedXSMeasure (as XSMeasure is the secondary superclass) and will hence be included in the
Identifiable table which holds everything within that heirarchy.

The features inherited from XSMeasure are references to a Code and a MeasureTypeDimension.

In the Teneo generated hibernate mapping, the COdedXSMeasure subclass contains these two properties
and there NOT NULL attribute is set to true, which corresponds to the model as these properties are
mandatory for subclasses of XSMeasure. But, once this is mapped to the single table inheritance
mapping for the DB I would assume that these fields would be NOT NULL and referential integrity
would be enforced by Hibernate (or Teneo) when these objects were being persisted.

Is this a bug or am I misunderstanding how this works ?

Duncan

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--------------000405030101020600080007--

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Re: [Teneo] Properties from subclass added as not null to superclass table. [message #77486 is a reply to message #77414]

Thu, 29 March 2007 15:16

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

Hi Duncan,
Yes this is a bug (or a missing feature). Setting nullable for inherited features in case of single
table is done for eattributes (primitive types) but not for EReferences. Please enter a bugzilla for
this.

gr. Martin

Duncan ALexander wrote:
> Hi Martin et al,
>
> I am noticing an issue with multiple inheritance and Teneo whereby
> properties from a subclass are being mapped into the superclass' table
> but set to NOT NULL. The result is that whenever a type is inserted into
> the table which does not have a discriminator type of that specific
> subclass these columns are NULL and an error is thrown from the DB.
>
> - Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2
>
> - Inheritance mapping is set to SINGLE_TABLE
>
> - See attached diagram for model snippit
>
> Looking in particular at CodedXSMeasure, this inherits from CodedMeasure
> and XSMeasure, CodedMeasure is a Measure, which is a Component which in
> turn is an Identifiable. Identifiable is the main class for this
> heirarchy and hence it maps to a table in the DB.
>
> From what I understand the way Teneo handles multiple inheritance, the
> features which CodedXSMeasure inherits from XSMeasure will be pulled
> into the subclass declaration for CodedXSMeasure (as XSMeasure is the
> secondary superclass) and will hence be included in the Identifiable
> table which holds everything within that heirarchy.
>
> The features inherited from XSMeasure are references to a Code and a
> MeasureTypeDimension.
>
> In the Teneo generated hibernate mapping, the COdedXSMeasure subclass
> contains these two properties and there NOT NULL attribute is set to
> true, which corresponds to the model as these properties are mandatory
> for subclasses of XSMeasure. But, once this is mapped to the single
> table inheritance mapping for the DB I would assume that these fields
> would be NOT NULL and referential integrity would be enforced by
> Hibernate (or Teneo) when these objects were being persisted.
>
> Is this a bug or am I misunderstanding how this works ?
>
> Duncan
>
>
> ------------------------------------------------------------ ------------
>

--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org

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Re: [Teneo] Properties from subclass added as not null to superclass table. [message #77601 is a reply to message #77486]

Thu, 29 March 2007 21:31

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

I was to quick with my analysis, ereference and single table are supported, this error occurs only
in multi-inheritance situations. I will provide a fix for this in the next release.

gr. Martin

Martin Taal wrote:
> Hi Duncan,
> Yes this is a bug (or a missing feature). Setting nullable for inherited
> features in case of single table is done for eattributes (primitive
> types) but not for EReferences. Please enter a bugzilla for this.
>
> gr. Martin
>
> Duncan ALexander wrote:
>> Hi Martin et al,
>> I am noticing an issue with multiple inheritance and Teneo
>> whereby properties from a subclass are being mapped into the
>> superclass' table but set to NOT NULL. The result is that whenever a
>> type is inserted into the table which does not have a discriminator
>> type of that specific subclass these columns are NULL and an error is
>> thrown from the DB.
>>
>> - Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2
>>
>> - Inheritance mapping is set to SINGLE_TABLE
>>
>> - See attached diagram for model snippit
>>
>> Looking in particular at CodedXSMeasure, this inherits from
>> CodedMeasure and XSMeasure, CodedMeasure is a Measure, which is a
>> Component which in turn is an Identifiable. Identifiable is the main
>> class for this heirarchy and hence it maps to a table in the DB.
>>
>> From what I understand the way Teneo handles multiple inheritance,
>> the features which CodedXSMeasure inherits from XSMeasure will be
>> pulled into the subclass declaration for CodedXSMeasure (as XSMeasure
>> is the secondary superclass) and will hence be included in the
>> Identifiable table which holds everything within that heirarchy.
>>
>> The features inherited from XSMeasure are references to a Code and a
>> MeasureTypeDimension.
>>
>> In the Teneo generated hibernate mapping, the COdedXSMeasure subclass
>> contains these two properties and there NOT NULL attribute is set to
>> true, which corresponds to the model as these properties are mandatory
>> for subclasses of XSMeasure. But, once this is mapped to the single
>> table inheritance mapping for the DB I would assume that these fields
>> would be NOT NULL and referential integrity would be enforced by
>> Hibernate (or Teneo) when these objects were being persisted.
>>
>> Is this a bug or am I misunderstanding how this works ?
>>
>> Duncan
>>
>>
>> ------------------------------------------------------------ ------------
>>
>
>

--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org

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Re: [Teneo] Properties from subclass added as not null to superclass table. [message #77616 is a reply to message #77601]

Fri, 30 March 2007 09:28

Duncan Alexander

Messages: 90
Registered: July 2009

Member

Ah right, no worries. Do you still want it in Bugzilla ?

Martin Taal wrote:
> I was to quick with my analysis, ereference and single table are
> supported, this error occurs only in multi-inheritance situations. I
> will provide a fix for this in the next release.
>
> gr. Martin
>
> Martin Taal wrote:
>> Hi Duncan,
>> Yes this is a bug (or a missing feature). Setting nullable for
>> inherited features in case of single table is done for eattributes
>> (primitive types) but not for EReferences. Please enter a bugzilla for
>> this.
>>
>> gr. Martin
>>
>> Duncan ALexander wrote:
>>> Hi Martin et al,
>>> I am noticing an issue with multiple inheritance and Teneo
>>> whereby properties from a subclass are being mapped into the
>>> superclass' table but set to NOT NULL. The result is that whenever a
>>> type is inserted into the table which does not have a discriminator
>>> type of that specific subclass these columns are NULL and an error is
>>> thrown from the DB.
>>>
>>> - Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2
>>>
>>> - Inheritance mapping is set to SINGLE_TABLE
>>>
>>> - See attached diagram for model snippit
>>>
>>> Looking in particular at CodedXSMeasure, this inherits from
>>> CodedMeasure and XSMeasure, CodedMeasure is a Measure, which is a
>>> Component which in turn is an Identifiable. Identifiable is the main
>>> class for this heirarchy and hence it maps to a table in the DB.
>>>
>>> From what I understand the way Teneo handles multiple inheritance,
>>> the features which CodedXSMeasure inherits from XSMeasure will be
>>> pulled into the subclass declaration for CodedXSMeasure (as XSMeasure
>>> is the secondary superclass) and will hence be included in the
>>> Identifiable table which holds everything within that heirarchy.
>>>
>>> The features inherited from XSMeasure are references to a Code and a
>>> MeasureTypeDimension.
>>>
>>> In the Teneo generated hibernate mapping, the COdedXSMeasure subclass
>>> contains these two properties and there NOT NULL attribute is set to
>>> true, which corresponds to the model as these properties are
>>> mandatory for subclasses of XSMeasure. But, once this is mapped to
>>> the single table inheritance mapping for the DB I would assume that
>>> these fields would be NOT NULL and referential integrity would be
>>> enforced by Hibernate (or Teneo) when these objects were being
>>> persisted.
>>>
>>> Is this a bug or am I misunderstanding how this works ?
>>>
>>> Duncan
>>>
>>>
>>> ------------------------------------------------------------ ------------
>>>
>>
>>
>
>

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Re: [Teneo] Properties from subclass added as not null to superclass table. [message #77659 is a reply to message #77616]

Fri, 30 March 2007 10:48

Martin Taal

Messages: 5468
Registered: July 2009

Senior Member

Yes please, the bugzillas are used to generate the release notes.

gr. Martin

Duncan ALexander wrote:
> Ah right, no worries. Do you still want it in Bugzilla ?
>
> Martin Taal wrote:
>> I was to quick with my analysis, ereference and single table are
>> supported, this error occurs only in multi-inheritance situations. I
>> will provide a fix for this in the next release.
>>
>> gr. Martin
>>
>> Martin Taal wrote:
>>> Hi Duncan,
>>> Yes this is a bug (or a missing feature). Setting nullable for
>>> inherited features in case of single table is done for eattributes
>>> (primitive types) but not for EReferences. Please enter a bugzilla
>>> for this.
>>>
>>> gr. Martin
>>>
>>> Duncan ALexander wrote:
>>>> Hi Martin et al,
>>>> I am noticing an issue with multiple inheritance and Teneo
>>>> whereby properties from a subclass are being mapped into the
>>>> superclass' table but set to NOT NULL. The result is that whenever a
>>>> type is inserted into the table which does not have a discriminator
>>>> type of that specific subclass these columns are NULL and an error
>>>> is thrown from the DB.
>>>>
>>>> - Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2
>>>>
>>>> - Inheritance mapping is set to SINGLE_TABLE
>>>>
>>>> - See attached diagram for model snippit
>>>>
>>>> Looking in particular at CodedXSMeasure, this inherits from
>>>> CodedMeasure and XSMeasure, CodedMeasure is a Measure, which is a
>>>> Component which in turn is an Identifiable. Identifiable is the main
>>>> class for this heirarchy and hence it maps to a table in the DB.
>>>>
>>>> From what I understand the way Teneo handles multiple inheritance,
>>>> the features which CodedXSMeasure inherits from XSMeasure will be
>>>> pulled into the subclass declaration for CodedXSMeasure (as
>>>> XSMeasure is the secondary superclass) and will hence be included in
>>>> the Identifiable table which holds everything within that heirarchy.
>>>>
>>>> The features inherited from XSMeasure are references to a Code and a
>>>> MeasureTypeDimension.
>>>>
>>>> In the Teneo generated hibernate mapping, the COdedXSMeasure
>>>> subclass contains these two properties and there NOT NULL attribute
>>>> is set to true, which corresponds to the model as these properties
>>>> are mandatory for subclasses of XSMeasure. But, once this is mapped
>>>> to the single table inheritance mapping for the DB I would assume
>>>> that these fields would be NOT NULL and referential integrity would
>>>> be enforced by Hibernate (or Teneo) when these objects were being
>>>> persisted.
>>>>
>>>> Is this a bug or am I misunderstanding how this works ?
>>>>
>>>> Duncan
>>>>
>>>>
>>>> ------------------------------------------------------------ ------------
>>>>
>>>>
>>>
>>>
>>
>>

--

With Regards, Martin Taal

Springsite/Elver.org
Office: Hardwareweg 4, 3821 BV Amersfoort
Postal: Nassaulaan 7, 3941 EC Doorn
The Netherlands
Tel: +31 (0)84 420 2397
Fax: +31 (0)84 225 9307
Mail: mtaal@springsite.com - mtaal@elver.org
Web: www.springsite.com - www.elver.org

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Re: [Teneo] Properties from subclass added as not null to superclass table. [message #78492 is a reply to message #77659]

Thu, 05 April 2007 14:29

Duncan Alexander

Messages: 90
Registered: July 2009

Member

Hi,
belatedly added to Bugzilla today.

Duncan
Martin Taal wrote:
> Yes please, the bugzillas are used to generate the release notes.
>
> gr. Martin
>
> Duncan ALexander wrote:
>> Ah right, no worries. Do you still want it in Bugzilla ?
>>
>> Martin Taal wrote:
>>> I was to quick with my analysis, ereference and single table are
>>> supported, this error occurs only in multi-inheritance situations. I
>>> will provide a fix for this in the next release.
>>>
>>> gr. Martin
>>>
>>> Martin Taal wrote:
>>>> Hi Duncan,
>>>> Yes this is a bug (or a missing feature). Setting nullable for
>>>> inherited features in case of single table is done for eattributes
>>>> (primitive types) but not for EReferences. Please enter a bugzilla
>>>> for this.
>>>>
>>>> gr. Martin
>>>>
>>>> Duncan ALexander wrote:
>>>>> Hi Martin et al,
>>>>> I am noticing an issue with multiple inheritance and Teneo
>>>>> whereby properties from a subclass are being mapped into the
>>>>> superclass' table but set to NOT NULL. The result is that whenever
>>>>> a type is inserted into the table which does not have a
>>>>> discriminator type of that specific subclass these columns are NULL
>>>>> and an error is thrown from the DB.
>>>>>
>>>>> - Setup: EMF 2.2, Teneo 0.75 with latest fixes, JDK 1.5, Hibernate 3.2
>>>>>
>>>>> - Inheritance mapping is set to SINGLE_TABLE
>>>>>
>>>>> - See attached diagram for model snippit
>>>>>
>>>>> Looking in particular at CodedXSMeasure, this inherits from
>>>>> CodedMeasure and XSMeasure, CodedMeasure is a Measure, which is a
>>>>> Component which in turn is an Identifiable. Identifiable is the
>>>>> main class for this heirarchy and hence it maps to a table in the DB.
>>>>>
>>>>> From what I understand the way Teneo handles multiple inheritance,
>>>>> the features which CodedXSMeasure inherits from XSMeasure will be
>>>>> pulled into the subclass declaration for CodedXSMeasure (as
>>>>> XSMeasure is the secondary superclass) and will hence be included
>>>>> in the Identifiable table which holds everything within that
>>>>> heirarchy.
>>>>>
>>>>> The features inherited from XSMeasure are references to a Code and
>>>>> a MeasureTypeDimension.
>>>>>
>>>>> In the Teneo generated hibernate mapping, the COdedXSMeasure
>>>>> subclass contains these two properties and there NOT NULL attribute
>>>>> is set to true, which corresponds to the model as these properties
>>>>> are mandatory for subclasses of XSMeasure. But, once this is mapped
>>>>> to the single table inheritance mapping for the DB I would assume
>>>>> that these fields would be NOT NULL and referential integrity would
>>>>> be enforced by Hibernate (or Teneo) when these objects were being
>>>>> persisted.
>>>>>
>>>>> Is this a bug or am I misunderstanding how this works ?
>>>>>
>>>>> Duncan
>>>>>
>>>>>
>>>>> ------------------------------------------------------------ ------------
>>>>>
>>>>>
>>>>
>>>>
>>>
>>>
>
>

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