I have 2 columns in a table that needs to be sequence generated, I have used @Id

Navajith K over 11 years ago

I have 2 columns in a table that needs to be sequence generated, I have used @Id and @GeneratedValue and @SequenceGenerator annotations for the first column in the xsd file and its working fine, however for the second column we have @GeneratedValue and @SequenceGenerator annotations, but the value is not sequentialy generated, its putting null values in this coulumns, Any thoughts?...

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0 Aleksi White
Appian Employee
over 11 years ago

The SequenceGenerator annotation is only compatible with the following RDBMS'

Oracle DB
IBM DB2

More information at:
wiki.eclipse.org/.../PrimaryKey
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0 Navajith K over 11 years ago

Thanks Aleksi, We are using Oracle DB, please let us know if we can have more than one sequence generated columns in one table?, We belive that we wont be able to use morethan one @Id annotation in the xsd file.
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0 Aleksi White
Appian Employee
over 11 years ago

From the Oracle documentation: "Defines a primary key generator that may be referenced by name when a generator element is specified for the GeneratedValue annotation. A sequence generator may be specified on the entity class or on the primary key field or property"

It looks like the @SequenceGenerator can only be used with the primary key field
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