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  1. MariaDB ColumnStore
  2. MCOL-4429

REGR_R2() results differ when compared to Innodb

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Details

    • Bug
    • Status: Open (View Workflow)
    • Major
    • Resolution: Unresolved
    • 5.5.1
    • Icebox
    • None
    • None

    Description

      Artifacts: https://cspkg.s3.amazonaws.com/index.html?prefix=develop-1.5/cron/1233/centos7/

      Columnstore:

      CREATE TABLE t1 (x INT, y MEDIUMINT)ENGINE=Columnstore;
      		 
      INSERT INTO t1 VALUES (20, 1),(39, 2),(48, 3),(57, 4),(66, 5),(75, 6),(84, 7);
      		 
      SELECT REGR_R2(y, x) FROM t1;
      		 
      +--------------------+
      		 
      | REGR_R2(y, x)      |
      		 
      +--------------------+
      		 
      | 0.9814869668246446 |
      		 
      +--------------------+

      Innodb:

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (x INT, y MEDIUMINT);
      		 
      INSERT INTO t1 VALUES (20, 1),(39, 2),(48, 3),(57, 4),(66, 5),(75, 6),(84, 7);
      		 
      SELECT REGR_R2(y, x) FROM t1;
      		 
      +--------------------+
      		 
      | REGR_R2(y, x)      |
      		 
      +--------------------+
      		 
      | 0.9814869668246445 |
      		 
      +--------------------+

      The same matches with Innodb results for builds under develop branch-
      https://cspkg.s3.amazonaws.com/index.html?prefix=develop/cron/1232

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        Issue Links

          relates to

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4431 regr_r2() and corr() outputs differ from the example DBMS

          • Minor - Minor loss of function, or other problem where easy workaround is present.
          • Closed

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              Unassigned Unassigned
              bharath.bokka Bharath Bokka (Inactive)
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              Dates

                Created:
                Updated:

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