| Interface | Description | 
|---|---|
| Column | The metadata of a column (or pseudocolumn) in a database. | 
| Class | Description | 
|---|---|
| ColumnImpl | An implementation of the column interface. | 
| Database | Bundles all information about a database. | 
| Torque | 
 A static facade wrapper around the Torque implementation (which is in
  TorqueInstance). | 
| TorqueInstance | The core of Torque's implementation. | 
| Exception | Description | 
|---|---|
| ConstraintViolationException | This exception is thrown if a database operation violates a
 database constraint, e.g. | 
| DeadlockException | This exception is thrown if the database detects a deadlock. | 
| NoRowsException | This exception indicates that no rows were returned but at least one should
 have been returned. | 
| OptimisticLockingFailedException | This exception is thrown if the database detects that a row in a table
 with optimistic locking was updated by another process. | 
| TooManyRowsException | This exception indicates that more rows were returned than expected. | 
| TorqueException | The base class of all checked exceptions thrown by Torque. | 
| TorqueRuntimeException | This is the base class of all non-checked exceptions in Torque. | 
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