Rick Hillegas created DERBY-6467:
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Summary: 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: 10.11.0.0
Reporter: Rick Hillegas
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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