PI21937: EJBQLS WITH FROM CLAUSE IN JOINS MAY PRODUCE INVALID SQL

8.5.5.4: WebSphere Application Server V8.5.5 Fix Pack 4
8.5.5.5: WebSphere Application Server V8.5.5 Fix Pack 5
8.5.5.6: WebSphere Application Server V8.5.5 Fix Pack 6
8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• Description: If an EJBQL query contains a join in the FROM
  clause (for xample, "IN a.b.c.d dGroup") where a middle
  element (b in this case) utilizes inheritance (for example, "b
  extends b_super") and there exists a predicate in the WHERE
  clause that navigates a common path element (that includes the
  inheritance-utilizing entity type) as the join defined in the
  FROM clause (for example, "WHERE a.b.x.id =?") and the
  terminal entity in that predicate also utilizes inheritance
  (for example, x extends x_super), then the query processing
  engine can fail and silently produce invalid SQL for the
  query.  The problem does not show up if no entities in the
  FROM clause join statement or the WHERE clause predicate use
  inheritance
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  *                  Versions 8.5.X                              *
  ****************************************************************
  * PROBLEM DESCRIPTION: Invalid SQL code may be produced in     *
  *                      join clauses by EJBDeploy               *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  If an EJBQL query contains a join in the FROM clause (for
  example, "IN a.b.c.d dGroup") where a middle element (b in
  this case) utilizes inheritance (for example, "b extends
  b_super") and there exists a predicate in the WHERE clause
  that navigates a common path element (that includes the
  inheritance-utilizing entity type) as the join defined in the
  FROM clause (for example, "WHERE a.b.x.id =?") and the
  terminal entity in that predicate also utilizes inheritance
  (for example, x extends x_super), then the query processing
  engine can fail and silently produce invalid SQL for the
  query.  The problem does not show up if no entities in the
  FROM clause join statement or the WHERE clause predicate use
  inheritance
  

Problem conclusion

• A warning message was added to indicate that invalid SQL code
  may be produced under certain circumstances.
  
  The fix for this APAR is currently targeted for inclusion in
  fix pack 8.5.5.4.  Please refer to the Recommended Updates
  page for delivery information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  

Temporary fix

Comments

APAR Information

• APAR is sysrouted FROM one or more of the following:

• APAR is sysrouted TO one or more of the following:

Fix information

• Fixed component name

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R700 PSY

     UP

• R800 PSY

     UP

• R850 PSY

     UP