A non-primary key column whose type is predefined when you create a data table is a predefined column. A predefined column can be used as an index column or attribute column of an index table. This topic describes the API operations that you can call to perform operations on predefined columns.
API operations
The following table describes the API operations that you can call to perform operations on predefined columns.
Item | API | Description |
Add predefined columns | You can add predefined columns to a data table. | |
Remove predefined columns | You can remove predefined columns from a data table. |