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https://issues.apache.org/jira/browse/OPENJPA-2578?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Vermeulen updated OPENJPA-2578:
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Attachment: openjpa_2578_test.zip
test case for the bug
> criteria API "group by" creates SQL with a parameter for a literal but does
> not provide it's value
> --------------------------------------------------------------------------------------------------
>
> Key: OPENJPA-2578
> URL: https://issues.apache.org/jira/browse/OPENJPA-2578
> Project: OpenJPA
> Issue Type: Bug
> Components: criteria
> Affects Versions: 2.4.0
> Reporter: Vermeulen
> Attachments: openjpa_2578_test.zip
>
>
> I have a query created using the criteria API where I group by an expression
> that contains a small calculation using literal values.
> OpenJPA generates the correct SQL but does not provide the value of the
> generated parameter in the group by clause. The query fails with a SQL
> exception similar to "The value is not set for the parameter number 9.".
> I can reproduce the issue with a minimal example (see attachment) where I
> create a person class with integer age and length columns and try to select
> the average length grouped by the person's age / 10.
> Whe running this query with trace and displaying parameters I get:
> 1067 testPU TRACE [main] openjpa.Query - Executing query: Query:
> org.apache.openjpa.kernel.QueryImpl@be4f81; candidate class: class
> entities.Person; query: null
> 1108 testPU TRACE [main] openjpa.jdbc.SQL - <t 5763249, conn 7326702>
> executing prepstmnt 26531336 SELECT AVG(t0.length) FROM Person t0 WHERE
> (t0.age > ?) GROUP BY (t0.age / ?) [params=(int) 20]
> You can clearly see that the query has two parameter placeholders but only
> one value is provided.
> As a workaround I can call setHint("openjpa.hint.UseLiteralInSQL", "true") on
> em.createQuery(query). (Which requires OpenJPA 2.4.0 when using boolean
> literals, see OPENJPA-2534.)
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