DB2 Version 9.7 for Linux, UNIX, and Windows

CURRENT CLIENT_USERID special register

The CURRENT CLIENT_USERID (or CLIENT USERID) special register contains the value of the client user ID from the client information specified for this connection. The data type of the register is VARCHAR(255). The default value of this register is an empty string.

The value of the client user ID can be changed by using the Set Client Information (sqleseti) API or the wlm_set_client_info procedure.

Note that the value provided via the sqleseti API is in the application code page, and the special register value is stored in the database code page. Depending on the data values used when setting the client information, truncation of the data value stored in the special register may occur during code page conversion.

Example: Find out in which department the current client user ID works.

   SELECT DEPT
     FROM DEPT_USERID_MAP
     WHERE USER_ID = CURRENT CLIENT_USERID