Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Cannot Reproduce
    • Affects Version/s: 10.4.1.3, 10.4.2.0
    • Fix Version/s: None
    • Component/s: SQL
    • Environment:
      OS: Windows Vista
      Application environment: Java 1.5 Swing Application using Derby DB in the embedded mode as part of the application.
    • Urgency:
      Normal
    • Issue & fix info:
      High Value Fix, Repro attached, Workaround attached
    • Bug behavior facts:
      Performance

      Description

      Having the following db schema:
      CREATE TABLE Messaged_Users (ACCOUNT_ID VARCHAR(20) NOT NULL,
      USER_ID VARCHAR(20) NOT NULL,
      DATE TIMESTAMP DEFAULT CURRENT_TIMESTAMP,
      STATUS INT DEFAULT 0,
      CONSTRAINT PK_ACC_USER_ID PRIMARY KEY (ACCOUNT_ID, USER_ID))
      CREATE TABLE Users (USER_ID VARCHAR(20) NOT NULL CONSTRAINT USER_ID_PK PRIMARY KEY,
      USER_NAME VARCHAR(50) NOT NULL)
      with approximately 100,000 records in each table and trying to execute the following query:
      PreparedStatement searchStatement = conn.prepareStatement("SELECT b.USER_ID, b.USER_NAME FROM Users a JOIN Messaged_Users b ON a.USER_ID=b.USER_ID AND a.ACCOUNT_ID=");
      searchStatement.setString(1, "5533232");
      ResultSet foundUsers = searchStatement.executeQuery();
      the executeQuery method actually never ends. I've waited for more than 30 mins and it didn't finish. I've tried it really many times but without any progress the query just hangs. I presume that this is definitely a bug in the derby db which should be fixed. Please note also that this fix is very urgent for us so that we can deliver our application.

      Thanks in advance for looking into this issue.

        Attachments

        1. query_plan.jpg
          44 kB
          Nirmal Fernando
        2. query_plan_derby_3892.pdf
          75 kB
          Nirmal Fernando
        3. Main.java
          5 kB
          Dag H. Wanvik
        4. Main_Updated.java
          6 kB
          Georgi Hristov
        5. Main_Updated.java
          7 kB
          Georgi Hristov
        6. Main_Updated.java
          7 kB
          Bryan Pendleton
        7. Main_Bryan.java
          7 kB
          Bryan Pendleton
        8. derbyTwoDifferentOneHundredKPlans.log
          11 kB
          Bryan Pendleton
        9. derby_50kRows.log
          3 kB
          Bryan Pendleton

          Activity

            People

            • Assignee:
              Unassigned
              Reporter:
              gorkoh Georgi Hristov
            • Votes:
              1 Vote for this issue
              Watchers:
              3 Start watching this issue

              Dates

              • Created:
                Updated:
                Resolved: