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  1. MariaDB Server
  2. MDEV-23859

view: arithmetic of column is wrong whereas underlying select works correctly

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Blocker
    • Resolution: Duplicate
    • Affects Version/s: 10.2, 10.3, 10.4, 10.5, 10.4.14
    • Fix Version/s: 10.2.35, 10.3.26, 10.4.16, 10.5.7
    • Component/s: Views
    • Labels:
      None
    • Environment:
      opensuse tumbleweed x86_64 kernel 5.8.10-1-default

      Description

      calculation of view column is wrong (by factor 1/10000). The column (3rd) is an arithmetic expression with an embedded select.

      ##  create view v1 as select "error" , count(*) cnt , count(*) / (( select count(*) from t1 b where ##  b.c3 = a.c3 ) / 100 ) "%" from t1 a where c1 < 5 group by c3 ;
      ##  select * from v1 ;
      ## +-------+-----+------------+
      ## | error |   4 | 0.00666700 |
      ## +-------+-----+------------+
      

      When executing the views underlying select directly, the correct value is returned.

      ## select "ok   " , count(*) cnt , count(*) / (( select count(*) from t1 b where b.c3 = a.c3 ) / 100 ) ## "%" from t1 a where c1 < 5 group by c3 ;
      ## +-------+-----+---------+
      ## | ok    |   4 | 66.6667 |
      ## +-------+-----+---------+
      
      

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              Assignee:
              serg Sergei Golubchik
              Reporter:
              mabmysql mabto
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                Dates

                Created:
                Updated:
                Resolved: