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https://issues.apache.org/jira/browse/HIVE-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12870475#action_12870475
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Arvind Prabhakar commented on HIVE-1179:
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bq. One minor point - can you make result a member variable of
GenericUDFArrayContains? This will reduce object creation.
While this will reduce object creation, it will cause correctness problems when
this UDF is used in an aggregate operation. Using a member variable for
{{result}} would then mean that all values of aggregated output will always
reflect the evaluated value of the last row. A similar problem would occur if
there is a lag between collecting and processing of output values. Hence my
preference is to keep the implementation as is (stateless).
If you still would like to make it a member variable, please let me know and I
can make that change.
> Add UDF array_contains
> ----------------------
>
> Key: HIVE-1179
> URL: https://issues.apache.org/jira/browse/HIVE-1179
> Project: Hadoop Hive
> Issue Type: New Feature
> Reporter: Zheng Shao
> Assignee: Arvind Prabhakar
> Attachments: HIVE-1179-1.patch, HIVE-1179-2.patch, HIVE-1179.patch
>
>
> Returns true or false, depending on whether an element is in an array.
> {{array_contains(T element, array<T> theArray)}}
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