Uploaded image for project: 'Derby'
  1. Derby
  2. DERBY-3301

Incorrect result from query with nested EXIST

    XMLWordPrintableJSON

    Details

    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 10.1.3.1, 10.2.1.6, 10.3.2.1
    • Fix Version/s: 10.3.3.0, 10.4.1.3
    • Component/s: SQL
    • Labels:
      None
    • Urgency:
      Urgent
    • Issue & fix info:
      Release Note Needed

      Description

      Derby returns unexpected results from a query with embedded EXIST clauses. The query SQL is generated by the JPOX jdo implementation and is supposed to return all of the PERSONS and PROJECTS where there is an entry in the join table. This query works as expected when using MySQL.

      Here's the query:

      SELECT UNBOUND_E.PERSONID, UNBOUND_P.PROJID
      FROM applicationidentity0.DEPARTMENTS THIS,
      applicationidentity0.PERSONS UNBOUND_E,
      applicationidentity0.PROJECTS UNBOUND_P
      WHERE EXISTS (
      SELECT 1 FROM applicationidentity0.PERSONS THIS_EMPLOYEES_E
      WHERE EXISTS (
      SELECT 1 FROM applicationidentity0.PROJECT_MEMBER THIS_EMPLOYEES_E_PROJECTS_P
      WHERE THIS_EMPLOYEES_E_PROJECTS_P."MEMBER" = THIS_EMPLOYEES_E.PERSONID
      AND THIS_EMPLOYEES_E_PROJECTS_P."MEMBER" = THIS_EMPLOYEES_E.PERSONID
      AND THIS_EMPLOYEES_E.DEPARTMENT = THIS.ID
      AND THIS_EMPLOYEES_E.DEPARTMENT = THIS.ID
      AND UNBOUND_P.PROJID = THIS_EMPLOYEES_E_PROJECTS_P.PROJID
      AND UNBOUND_E.PERSONID = THIS_EMPLOYEES_E.PERSONID)
      );
      PERSONID |PROJID
      -----------------------
      3 |1
      5 |3
      4 |3
      2 |1
      1 |1
      5 rows selected

      I'm expecting 7 rows to be returned here, one row for each row in the join table.

      Here's the schema:
      CREATE TABLE departments (
      ID INTEGER NOT NULL,
      NAME VARCHAR(32) NOT NULL,
      EMP_OF_THE_MONTH INTEGER,
      COMPANYID INTEGER,
      DISCRIMINATOR VARCHAR(255),
      CONSTRAINT DEPTS_COMP_FK FOREIGN KEY (COMPANYID) REFERENCES companies,
      CONSTRAINT DEPTS_PK PRIMARY KEY (ID)
      );

      CREATE TABLE persons (
      PERSONID INTEGER NOT NULL,
      FIRSTNAME VARCHAR(32) NOT NULL,
      LASTNAME VARCHAR(32) NOT NULL,
      MIDDLENAME VARCHAR(32),
      BIRTHDATE TIMESTAMP NOT NULL,
      ADDRID INTEGER,
      STREET VARCHAR(64),
      CITY VARCHAR(64),
      STATE CHAR(2),
      ZIPCODE CHAR(5),
      COUNTRY VARCHAR(64),
      HIREDATE TIMESTAMP,
      WEEKLYHOURS REAL,
      DEPARTMENT INTEGER,
      FUNDINGDEPT INTEGER,
      MANAGER INTEGER,
      MENTOR INTEGER,
      HRADVISOR INTEGER,
      SALARY REAL,
      WAGE REAL,
      DISCRIMINATOR varchar(255) NOT NULL,
      CONSTRAINT PERS_DEPT_FK FOREIGN KEY (DEPARTMENT) REFERENCES departments,
      CONSTRAINT PERS_FUNDDEPT_FK FOREIGN KEY (FUNDINGDEPT) REFERENCES departments,
      CONSTRAINT PERS_MANAGER_FK FOREIGN KEY (MANAGER) REFERENCES persons,
      CONSTRAINT PERS_MENTOR_FK FOREIGN KEY (MENTOR) REFERENCES persons,
      CONSTRAINT PERS_HRADVISOR_FK FOREIGN KEY (HRADVISOR) REFERENCES persons,
      CONSTRAINT EMPS_PK PRIMARY KEY (PERSONID)
      );

      CREATE TABLE projects (
      PROJID INTEGER NOT NULL,
      NAME VARCHAR(32) NOT NULL,
      BUDGET DECIMAL(11,2) NOT NULL,
      DISCRIMINATOR VARCHAR(255),
      CONSTRAINT PROJS_PK PRIMARY KEY (PROJID)
      );
      CREATE TABLE project_member (
      PROJID INTEGER REFERENCES projects NOT NULL,
      MEMBER INTEGER REFERENCES persons NOT NULL
      );

      ij> connect 'jdbc:derby:/Users/clr/apache/jdo/trunk/tck2/target/database/derby/jdotckdb';
      ij> set schema applicationidentity0;
      0 rows inserted/updated/deleted
      ij> select * from persons;
      PERSONID |FIRSTNAME |LASTNAME |MIDDLENAME |BIRTHDATE |ADDRID |STREET |CITY |STA&|ZIPC&|COUNTRY |HIREDATE |WEEKLYHOURS |DEPARTMENT |FUNDINGDEPT|MANAGER |MENTOR |HRADVISOR |SALARY |WAGE |DISCRIMINATOR
      -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
      1 |emp1First |emp1Last |emp1Middle |1970-06-09 21:00:00.0 |NULL |NULL |NULL |NULL|NULL |NULL |1998-12-31 21:00:00.0 |40.0 |NULL |NULL |NULL |NULL |NULL |20000.0 |NULL |org.apache.jdo.tck.pc.company.FullTimeEmployee
      2 |emp2First |emp2Last |emp2Middle |1975-12-21 21:00:00.0 |NULL |NULL |NULL |NULL|NULL |NULL |2003-06-30 21:00:00.0 |40.0 |NULL |NULL |NULL |NULL |NULL |10000.0 |NULL |org.apache.jdo.tck.pc.company.FullTimeEmployee
      3 |emp3First |emp3Last |emp3Middle |1972-09-04 21:00:00.0 |NULL |NULL |NULL |NULL|NULL |NULL |2002-08-14 21:00:00.0 |19.0 |NULL |NULL |NULL |NULL |NULL |NULL |15.0 |org.apache.jdo.tck.pc.company.PartTimeEmployee
      4 |emp4First |emp4Last |emp4Middle |1973-09-05 21:00:00.0 |NULL |NULL |NULL |NULL|NULL |NULL |2001-04-14 21:00:00.0 |0.0 |NULL |NULL |NULL |NULL |NULL |NULL |13.0 |org.apache.jdo.tck.pc.company.PartTimeEmployee
      5 |emp5First |emp5Last |emp5Middle |1962-07-04 21:00:00.0 |NULL |NULL |NULL |NULL|NULL |NULL |1998-08-14 21:00:00.0 |0.0 |NULL |NULL |NULL |NULL |NULL |45000.0 |NULL |org.apache.jdo.tck.pc.company.FullTimeEmployee

      5 rows selected
      ij> select * from projects;
      PROJID |NAME |BUDGET |DISCRIMINATOR
      -------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
      1 |orange |2500000.99 |org.apache.jdo.tck.pc.company.Project
      2 |blue |50000.00 |org.apache.jdo.tck.pc.company.Project
      3 |green |2000.99 |org.apache.jdo.tck.pc.company.Project

      3 rows selected
      ij> select * from project_member;
      PROJID |MEMBER
      -----------------------
      2 |3
      1 |3
      2 |2
      3 |5
      3 |4
      1 |2
      1 |1

      7 rows selected

        Attachments

        1. derby-3301.sql
          2 kB
          Craig L Russell
        2. d3301-queryplan.log
          8 kB
          Thomas Nielsen
        3. derby-3301-1.diff
          4 kB
          Thomas Nielsen
        4. derby-3301-1.stat
          0.2 kB
          Thomas Nielsen
        5. derby-3301-2.diff
          5 kB
          Thomas Nielsen
        6. derby-3301-3.diff
          6 kB
          Thomas Nielsen
        7. derby-3301-3b.diff
          6 kB
          Thomas Nielsen
        8. derby-3301-test-1.stat
          0.2 kB
          Thomas Nielsen
        9. derby-3301-test-1.diff
          8 kB
          Thomas Nielsen
        10. derby-3301-4.diff
          7 kB
          Thomas Nielsen
        11. derby-3301-4b.diff
          7 kB
          Thomas Nielsen
        12. derby-3301-4b.stat
          0.2 kB
          Thomas Nielsen
        13. derby-3301-test-2.diff
          9 kB
          Thomas Nielsen
        14. derby-3301-4c.diff
          7 kB
          Thomas Nielsen
        15. derby-3301-test-3.stat
          0.2 kB
          Thomas Nielsen
        16. derby-3301-test-3.diff
          9 kB
          Thomas Nielsen
        17. derby-3301-5.diff
          7 kB
          Thomas Nielsen
        18. derby-3301-test-master.diff
          7 kB
          Thomas Nielsen
        19. derby-3301-test-master.stat
          0.1 kB
          Thomas Nielsen
        20. derby-3301-extra.sql
          2 kB
          Thomas Nielsen
        21. derby-3301-6.diff
          7 kB
          Thomas Nielsen
        22. derby-3301-7.diff
          7 kB
          Thomas Nielsen
        23. derby-3301-8.diff
          7 kB
          Thomas Nielsen
        24. derby-3301-test-master-2.diff
          14 kB
          Thomas Nielsen
        25. derby-3301-test-master-3.diff
          3 kB
          Thomas Nielsen
        26. derby-3301-test-master-3.stat
          0.2 kB
          Thomas Nielsen
        27. Derby-3301.html
          4 kB
          Craig L Russell
        28. releaseNote.html
          4 kB
          Craig L Russell
        29. releaseNote.html
          4 kB
          Thomas Nielsen

          Issue Links

            Activity

              People

              • Assignee:
                thomanie Thomas Nielsen
                Reporter:
                clr Craig L Russell
              • Votes:
                0 Vote for this issue
                Watchers:
                2 Start watching this issue

                Dates

                • Created:
                  Updated:
                  Resolved: