Uploaded image for project: 'Hive'
  1. Hive
  2. HIVE-1938

Cost Based Query optimization for Joins in Hive

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: Query Processor, Statistics
    • Labels:
      None
    • Environment:

      *nix,java

    • Tags:
      Query optimization . Query processor

      Description

      Current optimization in Hive is just rule-based and involves applying a set of rules on the Plan tree. This depends on hints given by the user (which may or may-not be correct) and might result in execution of costlier plans.So this jira aims at building a cost-model which can give a good estimate various plans before hand (using some meta-data already collected) and we can choose the best plan which incurs the least cost.

        Attachments

          Issue Links

            Activity

              People

              • Assignee:
                bharathv bharath v
                Reporter:
                bharathv bharath v
              • Votes:
                1 Vote for this issue
                Watchers:
                18 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: