Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-3841 LevelDB storage engine
  3. MDEV-4085

LevelDB: Wrong result on range condition and aggregate function with two keys on a field

    XMLWordPrintable

Details

    • Technical task
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • None
    • None
    • None

    Description

      CREATE TABLE t1 (pk INT PRIMARY KEY, a INT, b CHAR(1), KEY(a), KEY(a,b)) 
        ENGINE=LevelDB;
      INSERT INTO t1 VALUES (1,10,'x'), (2,20,'y');
       
      EXPLAIN EXTENDED SELECT MAX(a) FROM t1 WHERE a < 100;
      id	select_type	table	type	possible_keys	key	key_len	ref	rows	filtered	Extra
      1	SIMPLE	NULL	NULL	NULL	NULL	NULL	NULL	NULL	NULL	No matching min/max row
      Warnings:
      Note	1003	/* select#1 */ select max(`test`.`t1`.`a`) AS `MAX(a)` from `test`.`t1` where (`test`.`t1`.`a` < 100)
       
      SELECT MAX(a) FROM t1 WHERE a < 100;
      MAX(a)
      NULL

      Test case:

      CREATE TABLE t1 (pk INT PRIMARY KEY, a INT, b CHAR(1), KEY(a), KEY(a,b)) 
        ENGINE=LevelDB;
      INSERT INTO t1 VALUES (1,10,'x'), (2,20,'y');
      SELECT MAX(a) FROM t1 WHERE a < 100;

      revision-id: psergey@askmonty.org-20130124165745-nm4yaxrsu8e4o2ll
      revno: 4511
      branch-nick: mysql-5.6-leveldb

      Attachments

        Activity

          People

            psergei Sergei Petrunia
            elenst Elena Stepanova
            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.