IT01588: CHANGE DATA CAPTURE SMART LARGE OBJECT READ PSEUDO CODE WRONG FOR .NET DRIVER

APAR status

• Closed as documentation error.

Error description

• http://www-01.ibm.com/support/knowledgecenter/SSGU8G_12.1.0/com.
  ibm.cdc.doc/ids_cdc_055.htm?lang=en
  
  Smart large object read function for the IBM Informix .NET
  Provider is documented wrong.
  The smart large object read function for .NET works differently
  than for other client APIs. The following pseudo code
  illustrates the basic structure for reading smart large objects
  with .NET:
  
  conn = new IfxConnection(..)// to SYSCDC database
  execute function informix.cdc_opensess() // on the same
  connection
  IfxBlob( IfxConnection connection )// construct it using the
  same connection
  IfxBlob.Open(ReadOnly) // open it
  IfxBlob.Read(char[] buff)   <<< This is Wrong
  
  This IfxBlob.Read() is wrong
  
  Should be:
  IfxBlob.Read(long plofd, byte[] buff)
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:                                              *
  * Informix 11.70, 12.10                                        *
  ****************************************************************
  * PROBLEM DESCRIPTION:                                         *
  * See Error Description                                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  * See problem conclusion.                                      *
  ****************************************************************
  

Problem conclusion

• The following corrected pseudo code illustrates the basic
  structure for reading smart large objects with .NET:
  conn = new IfxConnection(..)// to SYSCDC database
  execute function informix.cdc_opensess() // on the same
  connection
  IfxBlob( IfxConnection connection )// construct it using the
  same connection
  IfxBlob.Open(ReadOnly) // open it
  IfxBlob.Read(long plofd, byte[] buff)
  

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

Applicable component levels