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  1. MariaDB ColumnStore
  2. MCOL-3304

Window functions in queries with embedded selects produce bad numbers

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 1.2.3
    • Fix Version/s: 1.2.5
    • Component/s: ExeMgr
    • Labels:
      None
    • Sprint:
      2019-05, 2019-06

      Description

      See the following example below:
      The first query produces correct numbers.
      In the second query, all the sums over windows are 100 times too small!!
      If we create an InnoDB table, there is no issue

      CREATE TABLE `bug_cs` (
      `c` decimal(5,2) DEFAULT NULL
      ) ENGINE=columnstore;

      INSERT INTO `bug_cs`
      (`c`)
      VALUES (2.05), (5.44),(3.04);

      select c,sum(c) over(), sum(c) over w1, sum(c) over w2 from bug_cs
      WINDOW `w1` as (),`w2` as (rows between unbounded preceding and current row);

      select c,sum(c) over(), sum(c) over w1, sum(c) over w2 from
      (select
      sum(c) as c
      from
      bug_cs
      ) t WINDOW `w1` as (),`w2` as (rows between unbounded preceding and current row);

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            Assignee:
            dleeyh Daniel Lee
            Reporter:
            Girod Emmanuel
            Votes:
            1 Vote for this issue
            Watchers:
            3 Start watching this issue

              Dates

              Created:
              Updated:
              Resolved:

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