Package org.apache.drill.exec.physical.impl.scan.v3.file

package org.apache.drill.exec.physical.impl.scan.v3.file

Related Packages

Package	Description
org.apache.drill.exec.physical.impl.scan.v3	Provides the "version 3" scan framework (which can also be thought of as EVF version 2).
org.apache.drill.exec.physical.impl.scan.v3.lifecycle	Implements the details of the scan lifecycle for a set of readers, primarily the process of resolving the scan output schema from a variety of input schemas, then running each reader, each of which will produce some number of batches.
org.apache.drill.exec.physical.impl.scan.v3.schema	Provides run-time semantic analysis of the projection list for the scan operator.

Class	Description
FileDescrip	Describes one file within a scan and is used to populate implicit columns.
FileReaderFactory	Iterates over the splits for the present scan.
FileScanLifecycle	The file scan framework adds into the scan framework support for reading from DFS splits (a file and a block) and for the file-related implicit and partition columns.
FileScanLifecycleBuilder
FileSchemaNegotiator	The file schema negotiator provides access to the Drill file system and to the file split which the reader is to consume.
FileSchemaNegotiatorImpl	Implementation of the file-level schema negotiator which holds the file split which the reader is to process.
ImplicitColumnMarker	Marks a column as implicit and provides a function to resolve an implicit column given a description of the input file.
ImplicitColumnMarker.FileImplicitMarker	Marker for a file-based, non-internal implicit column that extracts parts of the file name as defined by the implicit column definition.
ImplicitColumnMarker.InternalColumnMarker
ImplicitColumnMarker.PartitionColumnMarker	Partition column defined by a partition depth from the scan root folder.
ImplicitColumnResolver	Manages the resolution of implicit file metadata and partition columns.
ImplicitColumnResolver.ImplicitColumnOptions
ImplicitColumnResolver.ParseResult	The result of scanning the scan output schema to identify implicit and partition columns.
ImplicitFileColumnsHandler	Manages implicit columns for files and partition columns for directories.