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Editorial Team
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Asked: 2026-05-25T02:50:06+00:00

I insert alot of data into a table with a autogenerated key using the

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I insert alot of data into a table with a autogenerated key using the batchUpdate functionality of JDBC. Because JDBC doesn’t say anything about batchUpdate and getAutogeneratedKeys I need some database independant workaround.

My ideas:

  1. Somehow pull the next handed out sequences from the database before inserting and then using the keys manually. But JDBC hasn’t got a getTheNextFutureKeys(howMany). So how can this be done? Is pulling keys e.g. in Oracle also transaction save? So only one transaction can ever pull the same set of future keys.

  2. Add an extra column with a fake id that is only valid during the transaction.

  3. Use all the other columns as secondary key to fetch the generated key. This isn’t really 3NF conform…

Are there better ideas or how can I use idea 1 in a generalized way?

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  1. Editorial Team

    Partial answer

    Is pulling keys e.g. in Oracle also transaction save?

    Yes, getting values from a sequence is transaction safe, by which I mean even if you roll back your transaction, a sequence value returned by the DB won’t be returned again under any circumstances.

    So you can prefetch the id-s from a sequence and use them in the batch insert.

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