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MCOL-523 documentation part 2

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David Hall
2017-09-05 17:11:22 -05:00
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utils/udfsdk/docs/source/reference/UDAFMap.rst
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UDAFMap
-------
UDAFMap holds a mapping from the function name to its implementation. The engine uses the map when a UDA(n)F is called by a SQL statement.
You must enter your function into the map. This means you must:
* #include your header file
* add an entry into UDAFMap::getMap().
The map is fully populated the first time it is called, i.e., the first time any UDA(n)F is called by a SQL statement.
The need for you to manually enter your function into this map may be alleviated by future enhancements.