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  1. Hive
  2. HIVE-707

add group_concat

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Details

    • New Feature
    • Status: Open
    • Major
    • Resolution: Unresolved
    • None
    • None
    • Query Processor
    • 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.

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          is duplicated by

          New Feature - A new feature of the product, which has yet to be developed. HIVE-650 [UDAF] implement GROUP_CONCAT(expr)

          • Major - Major loss of function.
          • Resolved

          New Feature - A new feature of the product, which has yet to be developed. HIVE-1689 Add GROUP_CONCAT to HiveQL

          • Major - Major loss of function.
          • Resolved
          is related to

          Improvement - An improvement or enhancement to an existing feature or task. HIVE-699 Make lots of existing ObjectInspectors settable

          • Major - Major loss of function.
          • Closed

          Activity

            People

              coderplay Min Zhou
              namit Namit Jain
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              Dates

                Created:
                Updated: