If any triggers depend on the table, the table is not dropped.
If a transaction is in progress and refers to the table, then an error is signaled and the table is not dropped.
The drop of table fails if other tables depend on the table to be dropped.
If a primary key exists, it is dropped. The user need not drop the primary key before dropping the table. If the primary key of the table is referenced by a constraint belonging to another table, then the table is not dropped and an error is signaled.
If the table has any foreign keys, then those foreign keys are dropped.
If the table has any other constraints (for example, NOT NULL, CHECK, UNIQUE, or NOT MODIFIABLE), then those constraints are dropped when the table is dropped.
The expression IF EXISTS causes the statement to return success instead of an error if a table does not exist. IF EXISTS does not suppress other errors.
Examples
The following statement drops the class table definition from the dictionary.