Hive
  1. Hive
  2. HIVE-2004

Configuring a Map-Reduce job with dynamic input in case of a LIMIT query that does not contain an ORDER BY

    Details

    • Type: New Feature New Feature
    • Status: Open
    • Priority: Major Major
    • Resolution: Unresolved
    • Affects Version/s: 0.8.0
    • Fix Version/s: None
    • Component/s: Query Processor
    • Labels:

      Description

      Refer to JIRA 1928 - https://issues.apache.org/jira/browse/MAPREDUCE-1928
      The JIRA proposed the option of adding input on the fly to a job that has been submitted and may as well be in a running stage. The JIRA was implemented on Hadoop-20.2 version.
      With the support for such a feature in Hadoop ( after application of the patch ), Hive can use the feature to optimize LIMIT queries that do not have an ORDER BY. For each query that qualifies to be of this kind, Hive needs to set appropriate parameters in the corresponding JobConf instance that gets created. The JobConf must have the attribute "dynamic.job" set to true and should have an appropriate InputProvider set. The input provider for optimizing the LIMIT query has been provided as part of the patch on Hadoop.

        Activity

        There are no comments yet on this issue.

          People

          • Assignee:
            Joydeep Sen Sarma
            Reporter:
            Raman Grover
          • Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

            Dates

            • Created:
              Updated:

              Time Tracking

              Estimated:
              Original Estimate - 168h
              168h
              Remaining:
              Remaining Estimate - 168h
              168h
              Logged:
              Time Spent - Not Specified
              Not Specified

                Development