4D v13.4 introduced the ability to modify the AUTO_INCREMENT property of a Long Int field via code. This also introduced the new MODIFY keyword for specifying the column to modify.

Here is an example of enabling auto_increment for [Table_1]id:

Begin SQL    ALTER TABLE Table_1 MODIFY id ENABLE AUTO_INCREMENT; End SQL

Here is an example of disabling auto_increment for [Table_1]id:

Begin SQL    ALTER TABLE Table_1 MODIFY id DISABLE AUTO_INCREMENT; End SQL

Here is the property this is referring to: