How do I get Table Metadata with JPA ?

[ajay rs]

I want to get all column's length form database table.
How can I have table metadata ? Is there any method or annotation?

I tried @Column annotaion, but there I have to set these all. But I want original length defined in table structure itself.

Any help regarding this will be appriciated.
Thanks

[James Sutherland]

There is nothing in JPA for this.

You can query your database catalog tables directly using native SQL, or use the JDBC API's directly.

If you are using EclipseLink, there is an API on SchemaManager.getAllColumnNames() that will return the column meta-data from the database.