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From "Knut Anders Hatlen (JIRA)" <j...@apache.org>
Subject [jira] Resolved: (DERBY-4401) Document USING clause in joins
Date Mon, 26 Apr 2010 08:23:31 GMT

     [ https://issues.apache.org/jira/browse/DERBY-4401?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Knut Anders Hatlen resolved DERBY-4401.
---------------------------------------

    Fix Version/s: 10.6.0.0
       Resolution: Fixed

Committed revision 937958.

> 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
>             Fix For: 10.6.0.0
>
>         Attachments: using.diff, using.zip
>
>
> 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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