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From "Raghotham Murthy (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HIVE-691) show documentation for user defined functions
Date Sat, 01 Aug 2009 06:36:14 GMT

    [ https://issues.apache.org/jira/browse/HIVE-691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12737839#action_12737839

Raghotham Murthy commented on HIVE-691:

Right now, by just looking at the code for a UDF/UDAF, it is hard to figure out what __FUNC__
is. Does it make sense to add the name of the function as one of the annotations? Then, maybe
later on, we can just register all classes with names UDF*, GenericUDF*, UDAF*, GenericUDAF*
in the classpath instead of explicitly listing out each function in the FunctionRegister.

> show documentation for user defined functions
> ---------------------------------------------
>                 Key: HIVE-691
>                 URL: https://issues.apache.org/jira/browse/HIVE-691
>             Project: Hadoop Hive
>          Issue Type: Improvement
>          Components: Query Processor
>            Reporter: Prasad Chakka
>            Assignee: Emil Ibrishimov
>             Fix For: 0.4.0
>         Attachments: HIVE-691.1.patch
> There are lot of functions and more of them will be added. I think it is cumbersome to
update wiki or ask users to go to wiki to find out documentation. instead each user defined
function can have an annotation containing documentation and 'show functions' command or similar
can show the documentation to users on command line. it will also be easier to update the
documentation along with code.

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