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update allocationSize of Sequence table [message #756875]

Tue, 15 November 2011 12:20

Vera Paskaleva

Messages: 2
Registered: November 2011

Junior Member

Hello,

We're using a primary key generator of type TABLE. By now we used the default value of allocationSize 50. But we have some problems with concurrency and we want to update allocationSize to 1. We've tried doing this:
@Id
@TableGenerator(name = "ID_GENERATOR", table = "SEQUENCES", allocationSize=1)
@GeneratedValue(generator="ID_GENERATOR")
but the generator starts with id = 1 and we have already record in the database with id 1. Is there any way we can update allocationSize to primary key generator that exists already without the initial value to be 0?

Thank you.

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Re: update allocationSize of Sequence table [message #756919 is a reply to message #756875]

Tue, 15 November 2011 14:32

Chris Delahunt

Messages: 1051
Registered: July 2009

Senior Member

Hello,

The SequenceGenerator annotation allows setting the initialValue which is used when the generator is created. If you already have the sequence table setup, you can change the value in the database directly, or you can modify the table using a native SQL query in the application.

Best Regards,
Chris

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