Package org.apache.druid.segment

Class ColumnSelectorColumnIndexSelector

java.lang.Object

org.apache.druid.segment.ColumnSelectorColumnIndexSelector

All Implemented Interfaces:

Expr.InputBindingInspector, ColumnIndexSelector, ColumnInspector, ColumnSelector

public class ColumnSelectorColumnIndexSelector
extends Object
implements ColumnIndexSelector

Constructor Summary

Constructors

Constructor	Description
ColumnSelectorColumnIndexSelector(BitmapFactory bitmapFactory, VirtualColumns virtualColumns, ColumnSelector index)

Method Summary

Modifier and Type	Method	Description
BitmapFactory	getBitmapFactory()
ColumnCapabilities	getColumnCapabilities(String column)	Returns capabilities of a particular column.
ColumnHolder	getColumnHolder(String columnName)
ColumnIndexSupplier	getIndexSupplier(String column)	Get the ColumnIndexSupplier of a column.
int	getNumRows()

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 Detail

ColumnSelectorColumnIndexSelector

public ColumnSelectorColumnIndexSelector(BitmapFactory bitmapFactory,
                                         VirtualColumns virtualColumns,
                                         ColumnSelector index)

Method Detail

getNumRows

public int getNumRows()

Specified by:

getNumRows in interface ColumnIndexSelector

getBitmapFactory

public BitmapFactory getBitmapFactory()

Specified by:

getBitmapFactory in interface ColumnIndexSelector

getIndexSupplier

public ColumnIndexSupplier getIndexSupplier(String column)

Description copied from interface: ColumnIndexSelector

Get the ColumnIndexSupplier of a column. If the column exists, but does not support indexes, this method will return a non-null index supplier, likely NoIndexesColumnIndexSupplier. Columns which are 'missing' will return a null value from this method, which allows for filters to act on this information to produce an all true or all false index depending on how the filter matches the null value.

Specified by:

getIndexSupplier in interface ColumnIndexSelector

getColumnHolder

@Nullable
public ColumnHolder getColumnHolder(String columnName)

Specified by:

getColumnHolder in interface ColumnSelector

getColumnCapabilities

@Nullable
public ColumnCapabilities getColumnCapabilities(String column)

Description copied from interface: ColumnInspector

Returns capabilities of a particular column.

Specified by:

getColumnCapabilities in interface ColumnInspector

Specified by:

getColumnCapabilities in interface ColumnSelector

Parameters:

column - column name

Returns:

capabilities, or null