IT27914: MERGE STATEMENT RETURNS SQLCODE -206 WITH EMPTY OR WRONG COLUMN NAME

Db2 Version 11.1 Mod 4 Fix Pack 7 for Linux, UNIX, and Windows

APAR status

• Closed as program error.

Error description

• A MERGE statement that references an uknown column may return an
  empty or wrong column name in SQL0206.  For example:
  
  CREATE TABLE SCHEMA1.TEST2 (
      ID INTEGER
     ,DESCRIPTION VARCHAR(20)
     ,UPDATE_TIMESTAMP TIMESTAMP
  );
  
  
  MERGE INTO SCHEMA1.TEST2 T
  USING ( VALUES (
      1
     ,'Test Value'
     ,CURRENT TIMESTAMP
     ,'USER1'
  )) AS VALUE_TABLE (ID, DESCRIPTION, UPDATE_TIMESTAMP,
  UPDATE_USERID)
  ON VALUE_TABLE.ID = T.ID
  WHEN MATCHED THEN
     UPDATE SET T.UPDATE_TIMESTAMP = VALUE_TABLE.UPDATE_TIMESTAMP
  --             ,T.UPDATE_USERID = VALUE_TABLE.UPDATE_USERID
  WHEN NOT MATCHED THEN
     INSERT (ID, DESCRIPTION, UPDATE_TIMESTAMP, UPDATE_USERID)
     VALUES (VALUE_TABLE.ID, VALUE_TABLE.DESCRIPTION,
  VALUE_TABLE.UPDATE_TIMESTAMP, VALUE_TABLE.UPDATE_USERID)
  ;
  
  SQL0206N "" is not valid in the context where it is used.
  SQLSTATE=42703
  

Local fix

• None, study the MERGE statement closely to identify the
  problematic column reference.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * ALL                                                          *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * Upgrade to Db2 version 11.1.4.7                              *
  ****************************************************************
  

Problem conclusion

• First fixed in Db2 version 11.1.4.7
  

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:

  IT27915 IT38214

Fix information

• Fixed component name

  DB2 FOR LUW

• Fixed component ID

  DB2FORLUW

Applicable component levels

• RB10 PSN

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