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  1. MariaDB ColumnStore
  2. MCOL-2146

group_concat with distinct concatenates even non-distinct values

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Minor
    • Resolution: Fixed
    • Affects Version/s: 1.0.15, 1.1.6, 1.2.2
    • Fix Version/s: 1.4.0
    • Component/s: ExeMgr
    • Labels:
      None
    • Sprint:
      2019-06

      Description

      If the group_concat contains distinct together with sorting over non-distinct column CS concatenates distinct values multiple times.

      Here is the setting:

      create table cs1 (i bigint, a bigint) engine=columnstore;
      insert into cs1 values (1,2),(1,3),(2,5),(1,42);
      

      MariaDB [tpch1]> select group_concat(distinct i order by a) s from cs1;
      +---------+
      | s       |
      +---------+
      | 1,1,2,1 |
      +---------+
      1 row in set (0.031 sec)
      

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              Assignee:
              dleeyh Daniel Lee
              Reporter:
              drrtuy Roman
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                Updated:
                Resolved: