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https://issues.apache.org/jira/browse/IMPALA-11527?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17828455#comment-17828455
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Manish Maheshwari commented on IMPALA-11527:
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Hi [~gaoxiaoqing] - Checking in, Are you planning to work on this feature?
> SUPPORT user-defined table functions (UDTFs)
> --------------------------------------------
>
> Key: IMPALA-11527
> URL: https://issues.apache.org/jira/browse/IMPALA-11527
> Project: IMPALA
> Issue Type: New Feature
> Reporter: gaoxiaoqing
> Assignee: gaoxiaoqing
> Priority: Major
>
> Currently, Impala does not support user-defined table functions (UDTFs), some
> Data Analysis Scenario need this feature such as funnel analysis, session
> analysis and so on. Other database Hive, Max compute support udtf. for
> example explode in hive:
> https://github.com/apache/hive/blob/master/ql/src/test/results/clientpositive/llap/udtf_explode.q.out
> Do we have plan to support impala udtf? The syntax of query is as follows,
> select udtf_explode(info) as (name, phone) from table;
> Besides, we can also support the following syntax,
> select udtf_example(c1, c2, c3) over (partition by c1 order by c2) as (num,
> c1, c2) from table;
> Users can create udtf, the create grammar as follows:
> create transform function udtf_example(BIGINT, STRING, STRING, ...)
> location '/tmp/libimpalaExts.so' prepare_fn='' init_fn='' update_fn=''
> finalize_fn='' close_fn=''
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