Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-9374

having '2015-01-01 01:00:00.000001' > coalesce(NULL) returns true

    XMLWordPrintable

Details

    • 10.0.26

    Description

      Output:

      mysql> drop table if exists t1;
      Query OK, 0 rows affected (0.00 sec)
       
      mysql> create table t1(c1 datetime(0));
      nsert inQuery OK, 0 rows affected (0.01 sec)
       
      mysql> insert into t1 values(null);
      Query OK, 1 row affected (0.00 sec)
       
      mysql> select * from t1 having '2015-01-01 01:00:00.000001' > coalesce(c1);
      +------+
      | c1   |
      +------+
      | NULL |
      +------+
      1 row in set (0.00 sec)
       
      mysql> select version();
      +-----------------+
      | version()       |
      +-----------------+
      | 10.1.10-MariaDB |
      +-----------------+
      1 row in set (0.00 sec)

      Recreate:

      drop table if exists t1;
      create table t1(c1 datetime(0));
      insert into t1 values(null);
      select * from t1 having '2015-01-01 01:00:00.000001' > coalesce(c1);

      Problem:
      =====
      having '2015-01-01 01:00:00.000001' > coalesce(c1) is expected to return NULL(False).

      Attachments

        Issue Links

          Activity

            People

              bar Alexander Barkov
              dylan Dylan Su
              Votes:
              0 Vote for this issue
              Watchers:
              3 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.