Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-14208

MapJoin uses key of outer input and Converter

    XMLWordPrintableJSON

Details

    • Improvement
    • Status: Open
    • Minor
    • Resolution: Unresolved
    • 2.2.0
    • None
    • Query Processor
    • None

    Description

      Consider an left outer MapJoin operator. OI for the outputs are created from outer and inner side from their inputs. However, when there is a match in the join, the data for the key is always taken from the outer side (as it is done currently). Thus, we need to apply the Converter logic on the data to get the correct type.

      This issue is to explore whether a better solution would be to use the key from correct inputs of the join to eliminate need of Converters.

      Attachments

        Issue Links

          is related to

          Bug - A problem which impairs or prevents the functions of the product. HIVE-14027 NULL values produced by left outer join do not behave as NULL

          • Major - Major loss of function.
          • Closed

          Activity

            People

              Unassigned Unassigned
              jcamacho Jesús Camacho Rodríguez
              Votes:
              0 Vote for this issue
              Watchers:
              0 Start watching this issue

              Dates

                Created:
                Updated: