Package org.apache.druid.segment.projections

Class Projections

java.lang.Object

org.apache.druid.segment.projections.Projections

public class Projections
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static interface	Projections.PhysicalColumnChecker	Returns true if column is defined in AggregateProjectionSpec.getGroupingColumns() OR if the column does not exist in the base table.
static class	Projections.ProjectionMatch
static class	Projections.ProjectionMatchBuilder

Constructor Summary

Constructors

Constructor	Description
Projections()

Method Summary

Modifier and Type	Method	Description
static <T> QueryableProjection<T>	findMatchingProjection(CursorBuildSpec cursorBuildSpec, SortedSet<AggregateProjectionMetadata> projections, Projections.PhysicalColumnChecker physicalChecker, Function<String,T> getRowSelector)
static String	getProjectionSmooshV9FileName(AggregateProjectionMetadata projectionSpec, String columnName)
static String	getProjectionSmooshV9Prefix(AggregateProjectionMetadata projectionSpec)
static com.google.common.base.Supplier<ColumnHolder>	makeConstantTimeSupplier(int numRows, long constant)

Methods inherited from class java.lang.Object

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

Constructor Detail

Projections

public Projections()

Method Detail

makeConstantTimeSupplier

public static com.google.common.base.Supplier<ColumnHolder> makeConstantTimeSupplier(int numRows,
                                                                                     long constant)

findMatchingProjection

@Nullable
public static <T> QueryableProjection<T> findMatchingProjection(CursorBuildSpec cursorBuildSpec,
                                                                SortedSet<AggregateProjectionMetadata> projections,
                                                                Projections.PhysicalColumnChecker physicalChecker,
                                                                Function<String,T> getRowSelector)

getProjectionSmooshV9FileName

public static String getProjectionSmooshV9FileName(AggregateProjectionMetadata projectionSpec,
                                                   String columnName)

getProjectionSmooshV9Prefix

public static String getProjectionSmooshV9Prefix(AggregateProjectionMetadata projectionSpec)