[jira] [Closed] (DERBY-6467) Document context-aware table functions.

["Rick Hillegas (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/DERBY-6467?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Rick Hillegas closed DERBY-6467.
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> Document context-aware table functions.
> ---------------------------------------
>
>                 Key: DERBY-6467
>                 URL: https://issues.apache.org/jira/browse/DERBY-6467
>             Project: Derby
>          Issue Type: Improvement
>          Components: Documentation
>    Affects Versions: 10.11.1.1
>            Reporter: Rick Hillegas
>            Assignee: Kim Haase
>             Fix For: 10.11.1.1
>
>         Attachments: DERBY-6467-2.diff, DERBY-6467-2.stat, DERBY-6467-2.zip, DERBY-6467.diff, DERBY-6467.stat, cdevspecialtfcontext.html
>
>
> Now that we have added AwareVTI and VTIContext to the public api, it would be good to document how to use them. Perhaps we could add a "Writing a context-aware table function" subtopic under the "Programming Derby-style table functions" topic in the Developer's Guide.
> As an example, the new subsection could use ArchiveVTI together with the script which is part of the 2014-02-02 comment on DERBY-6117.
> Context-aware table functions are useful when you need to describe a family of results which have the following properties:
> 1) Each result in the family has a shape which is determined by a different table.
> 2) There may be several results associated with a given table. In addition to having the same shape, the sub-family of results differ from one another based on some variables which cannot be represented as ? parameters in a SELECT statement.



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