Package org.apache.drill.common

Logical (execution-engine-independent) element definitions.

See: Description

Interface Summary

Interface	Description
AutoCloseables.Closeable
FunctionNames

Class Summary

Class	Description
AutoCloseablePointer<T extends AutoCloseable>	A class similar to Pointer<>, but with features unique to holding AutoCloseable pointers.
AutoCloseables	Utilities for AutoCloseable classes.
CatastrophicFailure
DeferredException	Collects one or more exceptions that may occur, using suppressed exceptions.
DrillAutoCloseables	Provides functionality comparable to Guava's Closeables for AutoCloseables.
EventProcessor<T>	Process events serially. Our use of listeners that deliver events directly can sometimes cause problems when events are delivered recursively in the middle of event handling by the same object.
HistoricalLog	Utility class that can be used to log activity within a class for later logging and debugging.
JSONOptions
JSONOptions.De
JSONOptions.Se
KerberosUtil
PlanStringBuilder	Builds a string in Drill's "plan string" format: that shown in the text version of EXPLAIN PLAN FOR output.
SelfCleaningRunnable	A wrapper for Runnables that provides a hook to do cleanup.
SerializedExecutor	Serializes execution of multiple submissions to a single target, while still using a thread pool to execute those submissions.
StackTrace	Convenient way of obtaining and manipulating stack traces for debugging.
Version	Encapsulates version information and provides ordering

Package org.apache.drill.common Description

Logical (execution-engine-independent) element definitions. Drill has several representations of a query including SQL, logical plans and physical plans. All of the logical constructs of Drill are separated from their physical implementations in the Java execution engine. The components of this package can be used to share common logical constructs between the current engine and any other future alternative physical implementations of the same logical constructs. This is the same for the logical expression constructs defined within this package.