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Artifact ID: 7aedf2b61aaf31a427c8b1dcc2929d9d80572333
Ticket: b7c8682cc17f32903f03a610bd0d35ffd3c1e6e4
Incorrect result from LEFT JOIN with OR in the WHERE clause
User & Date: drh 2012-03-09 16:58:06
Changes

  1. Change comment to:

    The following SQL demonstrates the problem:

    CREATE TABLE t1(a INTEGER PRIMARY KEY, b, c, d);
    CREATE TABLE t2(x INTEGER PRIMARY KEY, y);
    CREATE TABLE t3(p INTEGER PRIMARY KEY, q);
    INSERT INTO t1 VALUES(2,3,4,5);
    INSERT INTO t1 VALUES(3,4,5,6);
    INSERT INTO t2 VALUES(2,4);
    INSERT INTO t3 VALUES(5,55);

    SELECT * FROM t1 LEFT JOIN t2 ON y=b JOIN t3 WHERE c==p OR d==p;

    Prior to check-in [b23ae131874bc5c621f0] the query returns two rows. But following that check-in, only one row is returned. The two-row result is correct.

    This problem was discovered by Alan Chandler and reported on the mailing list as "Strange difference between sqlite 3.7.3 and 3.7.10".

  2. Change detected to "Application_Fault"
  3. Change foundin to "3.7.10"
  4. Change severity to "Severe"
  5. Change status to "Open"
  6. Change subsystem to "Unknown"
  7. Change title to:

    Incorrect result from LEFT JOIN with OR in the WHERE clause

  8. Change type to "Code_Defect"