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https://issues.apache.org/jira/browse/OPENJPA-1929?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12986404#action_12986404
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Rick Curtis commented on OPENJPA-1929:
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Can you post a unit test showing this behavior?
Thanks,
Rick
> ValueHandlers try to immediately write even though one is only reading
> ----------------------------------------------------------------------
>
> Key: OPENJPA-1929
> URL: https://issues.apache.org/jira/browse/OPENJPA-1929
> Project: OpenJPA
> Issue Type: Bug
> Components: jdbc
> Affects Versions: 2.0.1
> Environment: any
> Reporter: David Schmitz
>
> We have implemented an own ValueHandler by inheriting from
> AbstractValueHandler.
> If one reads from a query inside a transaction from a database, OpenJPA calls
> the handler (toDataStoreValue) of the unmodified query objects trying to
> write back to the database on commit, even though nothing has been
> manipulated.
> The writting can only be avoided when leaving out the transaction block.
> This is no correct JPA behaviour as it should be possible to do read-only
> data processing within a JPA transaction.
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