Uploaded image for project: 'MariaDB Server'
  1. MariaDB Server
  2. MDEV-36215

The projection operation caused a logical error

Details

    • Bug
    • Status: Confirmed (View Workflow)
    • Major
    • Resolution: Unresolved
    • 11.7.2, 10.5, 10.6, 10.11, 11.4, 11.8
    • 10.11, 11.4, 11.8
    • None
    • None
    • docker

    Description

      These two equivalent queries produce contradictory results:

      SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
      		 
      SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
      		 
       
      		 
      sudo docker run -it -p 3307:3306 -e MARIADB_ROOT_PASSWORD=root mariadb:latest
      		 
       
      		 
      CREATE TABLE t0(c0 FLOAT);
      		 
      CREATE TABLE t1(c1 FLOAT);
      		 
      INSERT INTO t0 VALUES (NULL), (NULL);
      		 
      INSERT INTO t1 VALUES (1.0);
      		 
      CREATE UNIQUE INDEX i0 USING BTREE ON t0(c0);
      		 
       
      		 
      SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
      		 
      +------+
      		 
      | c1   |
      		 
      +------+
      		 
      |    1 |
      		 
      +------+
      		 
      1 row in set (0.001 sec)
      		 
       
      		 
      SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
      		 
      +------+------+
      		 
      | c1   | c0   |
      		 
      +------+------+
      		 
      |    1 | NULL |
      		 
      |    1 | NULL |
      		 
      +------+------+
      		 
      2 rows in set (0.001 sec)

      Attachments

        Activity

          Ascending order - Click to sort in descending order
          jinhui lai jinhui lai created issue -
          alice Alice Sherepa made changes -
          Field Original Value New Value
          Description These two equivalent queries produce contradictory results:
          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);

          sudo docker run -it -p 3307:3306 -e MARIADB_ROOT_PASSWORD=root mariadb:latest

          CREATE TABLE t0(c0 FLOAT);
          CREATE TABLE t1(c1 FLOAT);
          INSERT INTO t0 VALUES (NULL), (NULL);
          INSERT INTO t1 VALUES (1.0);
          CREATE UNIQUE INDEX i0 USING BTREE ON t0(c0);

          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+
          | c1 |
          +------+
          | 1 |
          +------+
          1 row in set (0.001 sec)

          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+------+
          | c1 | c0 |
          +------+------+
          | 1 | NULL |
          | 1 | NULL |
          +------+------+
          2 rows in set (0.001 sec)           		These two equivalent queries produce contradictory results:
          {noformat}
          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);

          sudo docker run -it -p 3307:3306 -e MARIADB_ROOT_PASSWORD=root mariadb:latest

          CREATE TABLE t0(c0 FLOAT);
          CREATE TABLE t1(c1 FLOAT);
          INSERT INTO t0 VALUES (NULL), (NULL);
          INSERT INTO t1 VALUES (1.0);
          CREATE UNIQUE INDEX i0 USING BTREE ON t0(c0);

          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+
          | c1 |
          +------+
          | 1 |
          +------+
          1 row in set (0.001 sec)

          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+------+
          | c1 | c0 |
          +------+------+
          | 1 | NULL |
          | 1 | NULL |
          +------+------+
          2 rows in set (0.001 sec)
          {noformat}
          alice Alice Sherepa made changes -
          Affects Version/s 10.5 [ 23123 ]
          Affects Version/s 10.6 [ 24028 ]
          Affects Version/s 10.11 [ 27614 ]
          Affects Version/s 11.4 [ 29301 ]
          Affects Version/s 11.8 [ 29921 ]
          alice Alice Sherepa made changes -
          Priority Critical [ 2 ] Major [ 3 ]
          alice Alice Sherepa made changes -
          Fix Version/s 10.11 [ 27614 ]
          Fix Version/s 11.4 [ 29301 ]
          Fix Version/s 11.8 [ 29921 ]
          alice Alice Sherepa made changes -
          Assignee Sergei Petrunia [ psergey ]
          alice Alice Sherepa made changes -
          Status Open [ 1 ] Confirmed [ 10101 ]
          jinhui lai jinhui lai made changes -
          Description These two equivalent queries produce contradictory results:
          {noformat}
          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);

          sudo docker run -it -p 3307:3306 -e MARIADB_ROOT_PASSWORD=root mariadb:latest

          CREATE TABLE t0(c0 FLOAT);
          CREATE TABLE t1(c1 FLOAT);
          INSERT INTO t0 VALUES (NULL), (NULL);
          INSERT INTO t1 VALUES (1.0);
          CREATE UNIQUE INDEX i0 USING BTREE ON t0(c0);

          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+
          | c1 |
          +------+
          | 1 |
          +------+
          1 row in set (0.001 sec)

          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+------+
          | c1 | c0 |
          +------+------+
          | 1 | NULL |
          | 1 | NULL |
          +------+------+
          2 rows in set (0.001 sec)
          {noformat}           		These two equivalent queries produce contradictory results:
          {noformat}
          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);

          sudo docker run -it -p 3307:3306 -e MARIADB_ROOT_PASSWORD=root mariadb:latest

          CREATE TABLE t0(c0 FLOAT);
          CREATE TABLE t1(c1 FLOAT);
          INSERT INTO t0 VALUES (NULL), (NULL);
          INSERT INTO t1 VALUES (1.0);
          CREATE UNIQUE INDEX i0 USING BTREE ON t0(c0);

          SELECT t1.c1 FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+
          | c1 |
          +------+
          | 1 |
          +------+
          1 row in set (0.001 sec)

          SELECT * FROM t1 LEFT JOIN t0 ON (t0.c0 IS NULL);
          +------+------+
          | c1 | c0 |
          +------+------+
          | 1 | NULL |
          | 1 | NULL |
          +------+------+
          2 rows in set (0.001 sec)
          {noformat}

          People

            psergei Sergei Petrunia
            jinhui lai jinhui lai
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            Dates

              Created:
              Updated:

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