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  1. MariaDB ColumnStore
  2. MCOL-4613

Garbage result of a union between huge narrow DECIMAL and BIGINT

Details

    • 2021-7

    Description

      This ticket is for 5.6.1 only. Testing in 6.1.1 will need to wait until MCOL-4612 is MERGED into develop branch

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (a DECIMAL(17,1), b BIGINT) ENGINE=ColumnStore;
      		 
      INSERT INTO t1 VALUES (9999999999999999.9, 999999999999999999);
      		 
      SELECT * FROM (SELECT a FROM t1 UNION SELECT b FROM t1) tu;


      +-----------------------+
      		 
      | a                     |
      		 
      +-----------------------+
      		 
      |    9999999999999999.9 |
      		 
      | -844674407370955162.6 |
      		 
      +-----------------------+

      Looks wrong.

      Note, the problem cannot be repeated in 6.x because of MCOL-4612
      But perhaps it still exists. MCOL-4612 needs to be fixed first to verify it further in 6.x.

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        Issue Links

          is blocked by

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4612 A subquery with a union for DECIMAL and BIGINT returns zeros

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed
          relates to

          Task - A task that needs to be done. MCOL-4361 Replace pow(10.0, (double)scale) expressions with a static dictionary lookup.

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

          New Feature - A new feature of the product, which has yet to be developed. MCOL-641 Full DECIMAL support in ColumnStore

          • Major - Major loss of function.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4700 Wrong result of a UNION for INT and INT UNSIGNED

          • Major - Major loss of function.
          • Closed
          split to

          Task - A task that needs to be done. MCOL-4705 Retest MCOL-4613 in 6.1.1 given that the blocking fix for MCOL-4612 is merged into develop branch

          • Blocker - Blocks development and/or testing work, production could not run.
          • Closed

          Activity

            Transition Time In Source Status Execution Times
            Gagan Goel (Inactive) made transition -
            Open In Progress
            		38d 6h 1m 1
            Gagan Goel (Inactive) made transition -
            In Progress In Review
            		3d 2h 14m 1
            Alexander Barkov made transition -
            In Review Stalled
            		2d 23h 54m 1
            Gagan Goel (Inactive) made transition -
            Stalled In Progress
            		7m 31s 1
            Gagan Goel (Inactive) made transition -
            In Progress In Testing
            		7s 1
            Daniel Lee (Inactive) made transition -
            In Testing Closed
            		4h 20m 1

            People

              dleeyh Daniel Lee (Inactive)
              bar Alexander Barkov
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              Dates

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                Updated:
                Resolved:

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