You can change the column default and null indicators by
changing the DSQCP_TEDFLT and DSQCP_TENULL global variables.
Procedure
You can redefine the column default and null indicators
from the command line by using the SET GLOBAL command. For example,
to change the column default indicator to ? and the null indicator
to #, enter the following at the command line:
SET GLOBAL (DSQCP_TEDFLT=?, DSQCP_TENULL=#)
Once you have issued this command, the Table Editor
session illustrated in the following figure would reflect values similar
to those shown in the following figure: Figure 1. The Table Editor ADD panel with new
values for the column default and null indicators