PI78055: SQLCODE -138 IS ISSUED WHEN QUERY FROM A VIEW WHICH INCLUDES SUBSTR FUNCTION.

Obtain the fix for this APAR.

APAR status

• Closed as program error.

Error description

• Sqlcode -138 is issued when executing query from a view which
  includes SUBSTR function.
  

Local fix

• N/A
  

Problem summary

• ****************************************************************
  * USERS AFFECTED: All DB2 10 or 11 for z/OS users of an SQL    *
  *                 statement containing a view that contains    *
  *                 UNION ALL and a predicate with SUBSTR        *
  *                 function.                                    *
  ****************************************************************
  * PROBLEM DESCRIPTION: SQLCODE138 M380 could occur for an SQL  *
  *                      statement satisfying all of the         *
  *                      following conditions:                   *
  *                      1. It contains a view that references   *
  *                      a table expression with UNION ALL.      *
  *                      2. The corresponding select list of     *
  *                      UNION ALL has different string length   *
  *                      field.                                  *
  *                      3. There is predicate with SUBSTR       *
  *                      function which references the column    *
  *                      from the table expression with UNION    *
  *                      ALL.                                    *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  An example is shown below:
  
  CREATE TABLE T1(C1 CHAR(10)    NOT NULL,
                  C2 VARCHAR(10) NOT NULL);
  
  CREATE TABLE T2(C1 CHAR(10)    NOT NULL,
                  C2 VARCHAR(10)  NOT NULL);
  
  CREATE VIEW V1
    AS
      SELECT TX1.C1, TX1.C2
         FROM (SELECT C1, C2 FROM T1
               UNION ALL
               SELECT C1, '' AS C2 FROM T2
              ) AS TX1(C1, C2)
        WHERE SUBSTR(TX1.C2, 1, 2) = 'AB'
  ;
  
  SELECT * FROM V1;
  
  DB2 did not correctly process the aforementioned SQL
  and resulted in SQLCODE138 M380.
  

Problem conclusion

• DB2 has been modified to correctly process the aforementioned
  SQL statement.
  
  Additional Keywords: SQLUNIONALL SQLVIEW
  

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:

  PI79648 UI46352 UI46353

Modules/Macros

• DSNXOP1
  

Fix information

• Fixed component name

  DB2 OS/390 & Z/

• Fixed component ID

  5740XYR00

Applicable component levels

• RA10 PSY UI46352

     UP17/04/27 P F704

• RB10 PSY UI46353

     UP17/04/27 P F704

Fix is available

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