After an EDB table is created, some modifications can be introduced in its structure. Modifications are possible only for those EDB tables which correspond to tables ('TABLE') in the data source, not to views ('VIEW'). At that, it does not matter either the table was created by means of the data source server program or it vas added to the source by ObjectLand's means.
The menu command Edit+Change serves to change EDB table structure. This command launches the table changing wizard. This wizard does not need a particular description because it duplicates two steps of the table adding wizard, namely the step of defining columns (see figure 41-2) and the step of defining indexes (see figure 41-6). So, parameters which can be changed include the set of table columns and indexes of the table. Such parameters as the primary key, unique and foreign keys cannot be changed after the table is created.
It is to be taken into account that deleting table columns will also cause deleting of those keys or indexes in which the removed columns was used. The program alerts the user about that and asks him to confirm deletion.
 |  |
