Details

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

      Description

      Moving the discussion to a new jira:

      I've implemented group_cat() in a rush, and found something difficult to slove:
      1. function group_cat() has a internal order by clause, currently, we can't implement such an aggregation in hive.
      2. when the strings will be group concated are too large, in another words, if data skew appears, there is often not enough memory to store such a big result.

        Issue Links

          Activity

          Namit Jain created issue -
          Zheng Shao made changes -
          Field Original Value New Value
          Link This issue is related to HIVE-699 [ HIVE-699 ]
          Jeff Hammerbacher made changes -
          Link This issue is cloned as HIVE-1689 [ HIVE-1689 ]
          Jim Blomo made changes -
          Link This issue duplicates HIVE-650 [ HIVE-650 ]
          Jeff Hammerbacher made changes -
          Link This issue is duplicated by HIVE-650 [ HIVE-650 ]
          Jeff Hammerbacher made changes -
          Link This issue duplicates HIVE-650 [ HIVE-650 ]
          Jeff Hammerbacher made changes -
          Link This issue is cloned as HIVE-1689 [ HIVE-1689 ]
          Jeff Hammerbacher made changes -
          Link This issue is duplicated by HIVE-1689 [ HIVE-1689 ]

            People

            • Assignee:
              Min Zhou
              Reporter:
              Namit Jain
            • Votes:
              4 Vote for this issue
              Watchers:
              6 Start watching this issue

              Dates

              • Created:
                Updated:

                Development