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  1. MariaDB ColumnStore
  2. MCOL-4638

count distinct in a join asserts in Ubuntu 20.04

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Blocker
    • Resolution: Fixed
    • Affects Version/s: 5.5.1
    • Fix Version/s: 5.6.1
    • Component/s: ExeMgr
    • Labels:
    • Environment:
      Ubuntu 20.04
    • Sprint:
      2021-5, 2021-6, 2021-7

      Description

      The following query has a count(distinct) followed by statistics aggregates in a join. This will cause an assert in Ubuntu 20.04.

      select 'q34', l_shipmode, count(distinct l_orderkey), std(l_partkey*10), stddev(l_partkey*10), stddev_pop(l_partkey*10) from lineitem, part where l_orderkey > 1220 and l_orderkey < 1260 and l_partkey = p_partkey group by 1,2 order by 1,2;
      ERROR 1815 (HY000): Internal error: Lost connection to ExeMgr. Please contact your administrator
      

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            Assignee:
            dleeyh Daniel Lee
            Reporter:
            David.Hall David Hall
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              Updated:
              Resolved:

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