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https://issues.apache.org/jira/browse/HIVE-521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Min Zhou updated HIVE-521:
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Attachment: HIVE-521-all-v4.patch
passed tests on hadoop version 0.17.0.
> Move size, if, isnull, isnotnull to GenericUDF
> ----------------------------------------------
>
> Key: HIVE-521
> URL: https://issues.apache.org/jira/browse/HIVE-521
> Project: Hadoop Hive
> Issue Type: Improvement
> Affects Versions: 0.4.0
> Reporter: Zheng Shao
> Assignee: Min Zhou
> Fix For: 0.4.0
>
> Attachments: HIVE-521-all-v1.patch, HIVE-521-all-v2.patch,
> HIVE-521-all-v3.patch, HIVE-521-all-v4.patch, HIVE-521-IF-2.patch,
> HIVE-521-IF-3.patch, HIVE-521-IF-4.patch, HIVE-521-IF-5.patch,
> HIVE-521-IF.patch
>
>
> See HIVE-511 for an example of the move.
> size, if, isnull, isnotnull are all implemented with UDF but they are
> actually working on variable types of objects. We should move them to
> GenericUDF for better type handling.
> This also helps to clean up the hack in doing type matching/type conversion
> in UDF.
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