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Posted to issues@hivemall.apache.org by "Charles Pritchard (JIRA)" <ji...@apache.org> on 2017/07/03 04:30:00 UTC

[jira] [Created] (HIVEMALL-123) Create generic function for map merge

Charles Pritchard created HIVEMALL-123:
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             Summary: Create generic function for map merge
                 Key: HIVEMALL-123
                 URL: https://issues.apache.org/jira/browse/HIVEMALL-123
             Project: Hivemall
          Issue Type: New Feature
            Reporter: Charles Pritchard


As present in Brickhaus brickhouse.udf.collect.UnionUDAF - it'd be helpful to have a method that collects rows of maps into a single map. In this simplest use case... select union_map(mapCol) would be fine. There are possible cases for lambda execution or append or other failure cases, but I haven't come across a strong need for them.



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