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Auto ID generation strategy in JPA
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bagaria kushal
Greenhorn
Joined: Mar 29, 2011
Posts: 19
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If we specify id generation strategy as AUTO, the persistence provider chooses one of the following strategies :-
- Table
-Sequence
-Identity
My question is on what basis or criteria does the persistence provider decides which strategy to be used?
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James Sutherland
Ranch Hand
Joined: Oct 01, 2007
Posts: 550
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This depends on the provider.
By default EclipseLink uses TABLE sequencing. This is because IDENTITY and SEQUENCE require database support, so TABLE is the most platform independent.
See,
http://wiki.eclipse.org/EclipseLink/UserGuide/JPA/Basic_JPA_Development/Entities/Ids/GeneratedValue#.40GeneratedValue
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TopLink : EclipseLink : Book:Java Persistence : Blog:Java Persistence Performance
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subject: Auto ID generation strategy in JPA
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