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From "Milosz Tylenda (JIRA)" <j...@apache.org>
Subject [jira] Updated: (OPENJPA-1367) H2 Database Engine does support cross join
Date Fri, 05 Feb 2010 17:45:28 GMT

     [ https://issues.apache.org/jira/browse/OPENJPA-1367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Milosz Tylenda updated OPENJPA-1367:
------------------------------------

    Component/s:     (was: jpa)
                 sql
                 jdbc

> H2 Database Engine does support cross join
> ------------------------------------------
>
>                 Key: OPENJPA-1367
>                 URL: https://issues.apache.org/jira/browse/OPENJPA-1367
>             Project: OpenJPA
>          Issue Type: Bug
>          Components: docs, jdbc, sql
>    Affects Versions: 1.2.1, 2.0.0-M1
>            Reporter: Thomas Mueller
>            Assignee: Milosz Tylenda
>            Priority: Minor
>             Fix For: 2.0.0
>
>         Attachments: OPENJPA-1367.patch, openjpa-h2-test-results.txt
>
>
> The documentation says that the H2 database does not support cross joins:
> http://openjpa.apache.org/builds/1.2.1/apache-openjpa-1.2.1/docs/manual/dbsupport_h2.html
> http://openjpa.apache.org/builds/2.0.0-M3/apache-openjpa-2.0.0-M3/docs/manual/main.html
> H2 does support cross join since a long time (I don't remember what version). See: http://www.h2database.com/html/grammar.html#table_expression
(CROSS). A condition is not required for cross join.
> I think the documentation should be changed, and probably the H2Dictionary should be
changed as well (crossJoinClause = "CROSS JOIN"; requiresConditionForCrossJoin = false;).

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