PI72476: DB2 Z/OS SERVER RETURNS INCORRECT DATATYPE CAUSES THE JDBC APPLICATION TO RECEIVE ERRORCODE4474 FROM THE JDBC DRIVER

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• DB2 server returns incorrect SQLTYPE to the JDBC driver causes
  the application to encounter the following error:
  [jcc][Thread:main][SQLException@c225a608] Message    = Illegal
  conversion: can not convert from "java.lang.long" to "byte[]"
  ERRORCODE=-4474, SQLSTATE=null
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 10 and 11 for z/OS users of an SQL   *
  *                 statement containing a common table          *
  *                 expression that is not referenced and with a *
  *                 parameter marker or host variable.           *
  ****************************************************************
  * PROBLEM DESCRIPTION: Incorrect data type could be returned   *
  *                      for a DESCRIBE statement on an SQL      *
  *                      statement satisfying all of the         *
  *                      following conditions:                   *
  *                                                              *
  *                      1. It contains a common table           *
  *                         expression.                          *
  *                      2. The common table expression contains *
  *                         a parameter marker or host variable. *
  *                      3. The common table expression is not   *
  *                         referenced in the SQL statement.     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An example is shown below:
  
  CREATE TABLE T1 (C1 INT, C2 INT);
  
  WITH CT1 AS (
    SELECT * FROM T1
    WHERE C1 = ?
  )
  SELECT * FROM T1
  ;
  
  DESCRIBE returns incorrect data type for the parameter marker as
  CTE1 is not referenced in the SQL statement. If the SQL
  statement is executed though JDBC, an error message "Illegal
  conversion" with ERRORCODE=-4474 could be returned.
  

Problem conclusion

• DB2 has been modified to correctly process the aforementioned
  SQL statement.
  
  Additional keywords: SQLCTE SQLHOSTVAR PARAMETERMARKER
                       SQLPMARKER SQLPMK
  

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:

  UI43892 UI43893

Modules/Macros

• DSNXOQ2
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UI43892

     UP17/01/30 P F701

• RB10 PSY UI43893

     UP17/01/30 P F701

Fix is available

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