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https://issues.apache.org/jira/browse/DERBY-4355?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12750741#action_12750741
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Knut Anders Hatlen commented on DERBY-4355:
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Thanks Dag. I'll make the suggested change to sqlgrammar.jj. We have already
checked that onClause and usingClause are null at that point, so it should be
safe both ways.
As to the parameterized message, I think join specifications (ON/USING) are not
allowed for natural joins either, so the message may be reused if/when we
implement natural join.
> Implement CROSS JOIN
> --------------------
>
> Key: DERBY-4355
> URL: https://issues.apache.org/jira/browse/DERBY-4355
> Project: Derby
> Issue Type: Improvement
> Components: SQL
> Environment: any
> Reporter: Bernt M. Johnsen
> Attachments: cross.diff
>
>
> Implement the CROSS JOIN syntax
> SELECT * from t1 CROSS JOIN t2;
> as an alternative syntax to
> SELECT * FROM t1, t2;
> This should be pretty straight forward and ease the migration of SQL code to
> Derby.
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