Package org.apache.drill.exec.physical.resultSet.model.single

package org.apache.drill.exec.physical.resultSet.model.single

This set of classes models the structure of a batch consisting of single vectors (as contrasted with a hyper batch.) Provides tools or metdata-based construction, allocation, reading and writing of the vectors.

The classes here walk the container/map/vector tree to apply operations.

Related Packages

Package	Description
org.apache.drill.exec.physical.resultSet.model	The "row set model" provides a "dual" of the vector structure used to create, allocate and work with a collection of vectors.
org.apache.drill.exec.physical.resultSet.model.hyper	Implementation of a row set model for hyper-batches.

Classes

Class	Description
BaseWriterBuilder	Build a set of writers for a single (non-hyper) vector container.
BuildVectorsFromMetadata	Build (materialize) as set of vectors based on a provided metadata schema.
DirectRowIndex	Reader index that points directly to each row in the row set.
SimpleReaderBuilder	Builds a set of readers for a single (non-hyper) batch.
SingleSchemaInference	Produce a metadata schema from a vector container.
VectorAllocator	Given a vector container, and a metadata schema that matches the container, walk the schema tree to allocate new vectors according to a given row count and the size information provided in column metadata.