Package org.apache.druid.segment

Class QueryableIndexPhysicalSegmentInspector

java.lang.Object

org.apache.druid.segment.QueryableIndexPhysicalSegmentInspector

All Implemented Interfaces:

Expr.InputBindingInspector, ColumnInspector, PhysicalSegmentInspector

public class QueryableIndexPhysicalSegmentInspector
extends Object
implements PhysicalSegmentInspector

Constructor Summary

Constructors

Constructor	Description
QueryableIndexPhysicalSegmentInspector(QueryableIndex index)

Method Summary

Modifier and Type	Method	Description
ColumnCapabilities	getColumnCapabilities(String column)	Returns capabilities of a particular column.
int	getDimensionCardinality(String column)	Returns the number of distinct values in a column, if known, or DimensionDictionarySelector.CARDINALITY_UNKNOWN if not.}
Comparable	getMaxValue(String dimension)	Returns the minimum value of the provided column, if known through an index, dictionary, or cache.
Metadata	getMetadata()	Returns Metadata which contains details about how the segment was created
Comparable	getMinValue(String dimension)	Returns the minimum value of the provided column, if known through an index, dictionary, or cache.
int	getNumRows()	Returns the number of rows in the segment

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.segment.ColumnInspector

getType

Methods inherited from interface org.apache.druid.math.expr.Expr.InputBindingInspector

areNumeric, areNumeric, areSameTypes, areSameTypes, areScalar, areScalar, canVectorize, canVectorize

Constructor Details

QueryableIndexPhysicalSegmentInspector

public QueryableIndexPhysicalSegmentInspector(QueryableIndex index)

Method Details

getMetadata

public Metadata getMetadata()

Description copied from interface: PhysicalSegmentInspector

Returns Metadata which contains details about how the segment was created

Specified by:

getMetadata in interface PhysicalSegmentInspector

getMinValue

@Nullable
public Comparable getMinValue(String dimension)

Description copied from interface: PhysicalSegmentInspector

Returns the minimum value of the provided column, if known through an index, dictionary, or cache. Returns null if not known. Does not scan the column to find the minimum value.

Specified by:

getMinValue in interface PhysicalSegmentInspector

getMaxValue

@Nullable
public Comparable getMaxValue(String dimension)

Description copied from interface: PhysicalSegmentInspector

Returns the minimum value of the provided column, if known through an index, dictionary, or cache. Returns null if not known. Does not scan the column to find the maximum value.

Specified by:

getMaxValue in interface PhysicalSegmentInspector

getDimensionCardinality

public int getDimensionCardinality(String column)

Description copied from interface: PhysicalSegmentInspector

Returns the number of distinct values in a column, if known, or DimensionDictionarySelector.CARDINALITY_UNKNOWN if not.}

Specified by:

getDimensionCardinality in interface PhysicalSegmentInspector

getColumnCapabilities

@Nullable
public ColumnCapabilities getColumnCapabilities(String column)

Description copied from interface: ColumnInspector

Returns capabilities of a particular column.

Specified by:

getColumnCapabilities in interface ColumnInspector

Parameters:

column - column name

Returns:

capabilities, or null

getNumRows

public int getNumRows()

Description copied from interface: PhysicalSegmentInspector

Returns the number of rows in the segment

Specified by:

getNumRows in interface PhysicalSegmentInspector