- Vertabelo
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Идеи
Model subtypes using descriminator
Any plans of implementing this ?
Its common approach for modelling subtypes. It does not influence generated table structures, but are a great help in understanding the model.
Descriminator.PNG
Ответ
Hello,
This is possible in a logical database model. However with a little bit different notation. Moreover you can choose different generation strategies for an inheritance hierarchy that can be applied during generation of a physical model from a logical model.
We don't plan to introduce such notation for physical database models as these models should reflect real physical objects in a database.
Ok, got the picture. Modelling by inheritance.
One comment though. I normally want all my codes to come from a codeset table, hence the descriminator is a foreign key attribute on the master table. But the interface requires me to give a new name for the descriminator (unable to select an existing attribyte). Enterign an existing name will produce duplicate column name in the generated physical model.
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Hello,
This is possible in a logical database model. However with a little bit different notation. Moreover you can choose different generation strategies for an inheritance hierarchy that can be applied during generation of a physical model from a logical model.
We don't plan to introduce such notation for physical database models as these models should reflect real physical objects in a database.