org.apache.drill.exec.physical.impl.scan.project

Class WildcardProjection

java.lang.Object

org.apache.drill.exec.physical.impl.scan.project.ReaderLevelProjection

org.apache.drill.exec.physical.impl.scan.project.WildcardProjection

public class WildcardProjection
extends ReaderLevelProjection

Perform a wildcard projection. In this case, the query wants all columns in the source table, so the table drives the final projection. Since we include only those columns in the table, there is no need to create null columns. Example: SELECT *

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.drill.exec.physical.impl.scan.project.ReaderLevelProjection

ReaderLevelProjection.ReaderProjectionResolver

Field Summary

Fields inherited from class org.apache.drill.exec.physical.impl.scan.project.ReaderLevelProjection

resolvers

Constructor Summary

Constructors

Constructor and Description
WildcardProjection(ScanLevelProjection scanProj, TupleMetadata tableSchema, ResolvedTuple rootTuple, List<ReaderLevelProjection.ReaderProjectionResolver> resolvers)

Method Summary

Methods inherited from class org.apache.drill.exec.physical.impl.scan.project.ReaderLevelProjection

resolveSpecial

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

WildcardProjection

public WildcardProjection(ScanLevelProjection scanProj,
                          TupleMetadata tableSchema,
                          ResolvedTuple rootTuple,
                          List<ReaderLevelProjection.ReaderProjectionResolver> resolvers)