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https://issues.apache.org/jira/browse/DERBY-4401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Knut Anders Hatlen reassigned DERBY-4401:
-----------------------------------------
Assignee: Knut Anders Hatlen
> Document USING clause in joins
> ------------------------------
>
> Key: DERBY-4401
> URL: https://issues.apache.org/jira/browse/DERBY-4401
> Project: Derby
> Issue Type: Improvement
> Components: Documentation
> Affects Versions: 10.6.0.0
> Reporter: Knut Anders Hatlen
> Assignee: Knut Anders Hatlen
> Priority: Minor
>
> DERBY-4370 made some of the join operations accept a USING clause. This
> should be documented in the reference manual.
> The JOIN operations section talks about "join clause", which should be fine
> since that could mean both ON clause and USING clause.
> The sections INNER JOIN operation, LEFT OUTER JOIN operation and RIGHT OUTER
> JOIN operation need to be updated with the new syntax. We need to replace
> {
> ON booleanExpression
> }
> with
> {
> { ON booleanExpression } |
> { USING ( Simple-column-Name [ , Simple-column-Name ]* ) }
> }
> Perhaps it would make sense to factor out this part of the syntax into a
> separate element JoinSpecification, and explain the meaning of USING there.
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