Red Hat SummitEste conteúdo não está disponível no idioma selecionado.
9.2. Limitations
9.2.1. Inheritance Mapping Limitations
Copiar o linkLink copiado para a área de transferência!
There are limitations to the "implicit polymorphism" approach to the table per concrete-class mapping strategy. There are somewhat less restrictive limitations to
<union-subclass> mappings.
The following list shows the limitations of table per concrete-class mappings, and of implicit polymorphism, in Hibernate.
- table per class-heirarchy, table per subclass
- Polymorphic many-to-one:
<many-to-one> - Polymorphic one-to-one:
<one-to-one> - Polymorphic one-to-many:
<one-to-many> - Polymorphic many-to-many:
<many-to-many> - Polymorphic
load()orget():s.get(Payment.class, id) - Polymorphic queries:
from Payment p - Polymorphic joins:
from Order o join o.payment p
Outer join fetching is supported.- table per concrete-class (union-subclass)
- Polymorphic many-to-one:
<many-to-one> - Polymorphic one-to-one:
<one-to-one> - Polymorphic one-to-many:
<one-to-many>(forinverse="true"only) - Polymorphic many-to-many:
<many-to-many> - Polymorphic
load()orget():s.get(Payment.class, id) - Polymorphic queries:
from Payment p - Polymorphic joins:
from Order o join o.payment p
Outer join fetching is supported.- table per concrete class (implicit polymorphism
- Polymorphic many-to-one:
<any> - Polymorphic many-to-many:
<many-to-many> - Polymorphic
load()orget():s.createCriteria(Payment.class).add( Restrictions.idEq(id) ).uniqueResult() - Polymorphic queries:
from Payment p
Polymorphic one-to-one, polymorphic one-to-many, polymorphic joins, and outer join fetching are not supported.
'%20d='M201.5%20305.5c-13.8%200-24.9-11.1-24.9-24.6%200-13.8%2011.1-24.9%2024.9-24.9%2013.6%200%2024.6%2011.1%2024.6%2024.9%200%2013.6-11.1%2024.6-24.6%2024.6zM504%20256c0%20137-111%20248-248%20248S8%20393%208%20256%20119%208%20256%208s248%20111%20248%20248zm-132.3-41.2c-9.4%200-17.7%203.9-23.8%2010-22.4-15.5-52.6-25.5-86.1-26.6l17.4-78.3%2055.4%2012.5c0%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.3%2024.9-24.9s-11.1-24.9-24.9-24.9c-9.7%200-18%205.8-22.1%2013.8l-61.2-13.6c-3-.8-6.1%201.4-6.9%204.4l-19.1%2086.4c-33.2%201.4-63.1%2011.3-85.5%2026.8-6.1-6.4-14.7-10.2-24.1-10.2-34.9%200-46.3%2046.9-14.4%2062.8-1.1%205-1.7%2010.2-1.7%2015.5%200%2052.6%2059.2%2095.2%20132%2095.2%2073.1%200%20132.3-42.6%20132.3-95.2%200-5.3-.6-10.8-1.9-15.8%2031.3-16%2019.8-62.5-14.9-62.5zM302.8%20331c-18.2%2018.2-76.1%2017.9-93.6%200-2.2-2.2-6.1-2.2-8.3%200-2.5%202.5-2.5%206.4%200%208.6%2022.8%2022.8%2087.3%2022.8%20110.2%200%202.5-2.2%202.5-6.1%200-8.6-2.2-2.2-6.1-2.2-8.3%200zm7.7-75c-13.6%200-24.6%2011.1-24.6%2024.9%200%2013.6%2011.1%2024.6%2024.6%2024.6%2013.8%200%2024.9-11.1%2024.9-24.6%200-13.8-11-24.9-24.9-24.9z'/%3e%3c/svg%3e){kind=small}