What you can do
You can:
-
Allow updates
in a DataWindow object associated with multiple tables or a view; you can
define one of the tables as being updatable -
Prevent updates in a DataWindow object associated with
one table -
Prevent updates to specific columns in a DataWindow object that
is associated with an updatable table -
Specify which columns uniquely identify a row to
be updated -
Specify which columns will be included in the WHERE clause
of the UPDATE or DELETE statement PowerBuilder generates
to update the database -
Specify whether PowerBuilder generates an UPDATE statement,
or a DELETE then an INSERT statement,
to update the database when users modify the values in a key
column
Updatability of views
Some views are logically updatable; some are not. For the
rules your DBMS follows for updating views, see your DBMS documentation.
To specify update characteristics for a DataWindow object:
-
Select Rows>Update Properties
from the menu bar.The Specify Update Properties dialog box displays.
-
To prevent updates to the data, make sure the
Allow Updates box is not selected.To allow updates, select the Allow Updates box and specify
the other settings as described below. -
Click OK.
Changing tab values
PowerBuilder does not change the tab values associated with
columns after you change the update characteristics of the DataWindow object.
If you have allowed updates to a table in a multitable DataWindow object,
you should change the tab values for the updatable columns so that users can
tab to them.
For more information, see “Defining the tab order
in a DataWindow object”.