H2 Database Engine does support cross join
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Key: OPENJPA-1367
URL:
https://issues.apache.org/jira/browse/OPENJPA-1367 Project: OpenJPA
Issue Type: Bug
Components: docs, jpa
Affects Versions: 2.0.0-M1, 1.2.1
Reporter: Thomas Mueller
Priority: Minor
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.htmlhttp://openjpa.apache.org/builds/2.0.0-M3/apache-openjpa-2.0.0-M3/docs/manual/main.htmlH2 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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