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https://issues.apache.org/jira/browse/HIVE-52?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Venky Iyer deleted HIVE-52:
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> User-definable handlers for MAP and REDUCE transforms
> -----------------------------------------------------
>
> Key: HIVE-52
> URL: https://issues.apache.org/jira/browse/HIVE-52
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Venky Iyer
>
> Mappers can be specified (as before) like:
> .... MAP USING 'uri' .....
> uris are in a format to be decided upon; possibilities are
> protocol://resource/param=value,param2=value2
> or
> protocol: resource_string
> For example, shell commands are like
> sh://uniq or
> sh: sort | uniq
> When no protocol is specified, we assume the default to be sh://.
> Another example is pyfunc://foo.bar/baz=2 , which points to the bar(baz=2)
> function from the foo module.
> We can add handlers for these protocols like
> add handler sh shell (default)
> add handler pyfunc "python pyhive.py"
> and replace these handlers using appropriate syntax.
> Map and Reduce handlers can be distinct.
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