Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-663

LP:1001092 - Query with GROUP BY returns an extra row

    XMLWordPrintable

Details

    Description

      The following test case produces a wrong result in MariaDB 5.2:

      CREATE TABLE t1 (vc varchar(1), INDEX vc_idx (vc)) ;
      INSERT INTO t1 VALUES (NULL), ('o'), (NULL), ('p'), ('c');
      FLUSH TABLE t1;
      SELECT vc FROM t1 GROUP BY vc;

      MariaDB [test]> SELECT vc FROM t1 GROUP BY vc;
      ------

      vc

      ------

      NULL
      NULL
      c
      o
      p

      ------
      5 rows in set (0.01 sec)

      (See also bug #12837714 in mysql-trunk)

      Attachments

        Activity

          People

            sanja Oleksandr Byelkin
            igor Igor Babaev
            Votes:
            0 Vote for this issue
            Watchers:
            1 Start watching this issue

            Dates

              Created:
              Updated:
              Resolved:

              Git Integration

                Error rendering 'com.xiplink.jira.git.jira_git_plugin:git-issue-webpanel'. Please contact your Jira administrators.