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InheritancePolicy SingleTableStrategy in Dynamic Persistence [message #1063015]

Tue, 11 June 2013 19:13

Gaurav Gupta

Messages: 9
Registered: June 2013
Location: India

Junior Member

as Specified in Eclipselink Source code isJoinedStrategy = true; by default
but when i applied SingleTableStrategy(means internally isJoinedStrategy = false)
there are no changes in DataBase Schema (still joined strategy is applied default)

Parent Entity Descriptor

.getInheritancePolicy().setSingleTableStrategy();

Child Entity Descriptor

.getInheritancePolicy().setSingleTableStrategy();

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Re: InheritancePolicy SingleTableStrategy in Dynamic Persistence [message #1064268 is a reply to message #1063015]

Tue, 18 June 2013 13:55

James Sutherland

Messages: 1939
Registered: July 2009
Location: Ottawa, Canada

Senior Member

How are you building your descriptors? If you use JPA orm.xml then JPA auto-mapping and defaults will occur.

If you are building descriptors manually, then JPA auto-mapping and defaults do not apply, you must set everything.
For inheritance if you declare a table in the subclass, it will have a table, if you don't, then it won't, it will just share its parent's table.

James : Wiki : Book : Blog : Twitter

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Re: InheritancePolicy SingleTableStrategy in Dynamic Persistence [message #1064520 is a reply to message #1064268]

Wed, 19 June 2013 15:49

Gaurav Gupta

Messages: 9
Registered: June 2013
Location: India

Junior Member

James Sutherland wrote on Tue, 18 June 2013 09:55

For inheritance if you declare a table in the subclass, it will have a table, if you don't, then it won't, it will just share its parent's table.

Thanks James for your response , problem resolved Smile

I was calling

.getInheritancePolicy().setSingleTableStrategy();

in both Parent and Child Entity Descriptor but using different table name in parent and child entity.

Solution : Using same table name for both parent and child entity with

.getInheritancePolicy().setSingleTableStrategy();

in Parent and Child Entity Descriptor , I am able to achieve Single Table Inheritence Strategy Smile

[Updated on: Wed, 19 June 2013 15:56]

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