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  1. MariaDB ColumnStore
  2. MCOL-4700

Wrong result of a UNION for INT and INT UNSIGNED

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    Details

    • Type: Bug
    • Status: Closed (View Workflow)
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: None
    • Fix Version/s: 6.1.1
    • Component/s: PrimProc
    • Labels:
      None

      Description

      This problem was found by Gagan Goel while working on MCOL-4612 and MCOL-4613.

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (a INT, b INT UNSIGNED) ENGINE=ColumnStore;
      		 
      INSERT INTO t1 VALUES (-1,1);
      		 
      SELECT * FROM (SELECT a FROM t1 UNION SELECT b FROM t1) tu;


      +------------+
      		 
      | a          |
      		 
      +------------+
      		 
      | 4294967295 |
      		 
      |          1 |
      		 
      +------------+

      Looks wrong. The expected result would be:

      DROP TABLE IF EXISTS t1;
      		 
      CREATE TABLE t1 (a INT, b INT UNSIGNED) ENGINE=InnoDB;
      		 
      INSERT INTO t1 VALUES (-1,1);
      		 
      SELECT * FROM (SELECT a FROM t1 UNION SELECT b FROM t1) tu;
      		 
      {code:sql}
      		 
      +------+
      		 
      | a    |
      		 
      +------+
      		 
      |   -1 |
      		 
      |    1 |
      		 
      +------+

        Attachments

          Issue Links

          relates to

          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-4612 A subquery with a union for DECIMAL and BIGINT returns zeros

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

          Bug - A problem which impairs or prevents the functions of the product. MCOL-4613 Garbage result of a union between huge narrow DECIMAL and BIGINT

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

            Activity

              People

              Assignee:
              dleeyh Daniel Lee
              Reporter:
              bar Alexander Barkov
              Votes:
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              Watchers:
              3 Start watching this issue

                Dates

                Created:
                Updated:
                Resolved:

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