Package org.apache.drill.exec.ops

Interface Summary

Interface	Description
BufferManager	Manages a list of DrillBufs that can be reallocated as needed.
Consumer<T>
ExchangeFragmentContext	This provides the resources required by an exchange operator.
ExecutorFragmentContext	The context that is used by a Drillbit in classes like the FragmentExecutor.
FragmentContext	Provides the resources required by a non-exchange operator to execute.
FragmentContext.ExecutorState
FragmentContextInterface	Fragment context interface: separates implementation from definition.
MetricDef	Interface that defines a metric.
OperatorContext	Per-operator services available for operator implementations.
OperatorStatReceiver	Interface for updating a statistic.
OptimizerRulesContext
RootFragmentContext	Provides services needed by the FragmentExecutor.
UdfUtilities	Defines the query state and shared resources available to UDFs through injectables.

Class Summary

Class	Description
AccountingDataTunnel	Wrapper around a DataTunnel that tracks the status of batches sent to to other Drillbits.
AccountingUserConnection	Wrapper around a UserClientConnection that tracks the status of batches sent to User.
BaseFragmentContext	Common implementation for both the test and production versions of the fragment context.
BaseOperatorContext	Implementation of OperatorContext that provides services needed by most run-time operators.
BufferManagerImpl
ContextInformation	Provides query context information (such as query start time, query user, default schema etc.) for UDFs.
DataTunnelStatusHandler	Listener that keeps track of the status of batches sent, and updates the SendingAccountor when status is received for each batch
FragmentContextImpl	This is the core Context which implements all the Context interfaces: FragmentContext: A context provided to non-exchange operators. ExchangeFragmentContext: A context provided to exchange operators. RootFragmentContext: A context provided to fragment roots. ExecutorFragmentContext: A context used by the Drillbit. The interfaces above expose resources to varying degrees.
FragmentStats	Holds statistics of a particular (minor) fragment.
OperatorMetricRegistry	Registry of operator metrics.
OperatorStats
OperatorUtilities	Utility methods, formerly on the OperatorContext class, that work with operators.
OpProfileDef
QueryContext
SendingAccountor	Account for whether all messages sent have been completed.
StatusHandler	Listener that keeps track of the status of batches sent, and updates the SendingAccountor when status is received for each batch
ViewExpansionContext	Contains context information about view expansion(s) in a query.

Enum Summary

Enum	Description
QueryContext.SqlStatementType

Exception Summary

Exception	Description
QueryCancelledException	Indicates that an external source has cancelled the query.