Productize the DatabaseMetaData wrapper functions.
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Key: DERBY-4945
URL: https://issues.apache.org/jira/browse/DERBY-4945
Project: Derby
Issue Type: Improvement
Components: JDBC, Tools
Reporter: Rick Hillegas
Tech support can use the DatabaseMetaData wrapper functions to answer questions
about Derby metadata. Today some of those questions can't be answered easily
because we have not implemented the SQL Information Schema. The functions can
be found attached to DERBY-3973. An email thread discussed how to productize
these functions:
http://old.nabble.com/productizing-the-metadata-wrapper-functions-to30428490.html#a30428490
Consensus developed around the following points:
1) The DatabaseMetaData wrappers are useful to Derby developers and to tech
support.
2) The wrappers are lightweight enough to be bundled in the engine jar.
3) We do not want to create new compatibility guarantees for Derby. Therefore,
the functions should not be exposed in Derby's public api and should not be
documented in the user guides.
The following approach makes some sense:
A) Put the wrappers in Derby's diag package.
B) Make it possible to register and invoke diag methods which load and unload
the wrappers.
C) Use the Derby wiki to document how tech support can use these wrappers.
D) Be prepared to remove these wrappers when we implement the Information
Schema.
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