You can use the IBM® Table Designer to change the definition of an IBM database table. Alternatively, if you created a table in the Visual Studio Code Editor, you can edit the source code of the table.
To change a table definition:
The IBM Table Designer opens.
For detailed information about the fields in the designer views, see IBM Table Designer.
The table under your data connection is updated with your changes.
Developing IBM Database Tables | IBM Database Tables | Permitted Changes in IBM Database Tables