```
public interface AccessCallback
```
Contract for providing callback access to a DatabaseStructure, typically from the Optimizer.

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`IntegralDataTypeHolder`	`getNextValue()`	Retrieve the next value from the underlying source.
`java.lang.String`	`getTenantIdentifier()`	Obtain the tenant identifier (multi-tenancy), if one, associated with this callback.

Interface AccessCallback