org.apache.druid.segment

Interface ColumnSelector

All Superinterfaces:

ColumnInspector, Expr.InputBindingInspector

All Known Implementing Classes:

ColumnCache, DeprecatedQueryableIndexColumnSelector

public interface ColumnSelector
extends ColumnInspector

Method Summary

Modifier and Type	Method and Description
default ColumnCapabilities	getColumnCapabilities(String column) Returns capabilities of a particular column.
ColumnHolder	getColumnHolder(String columnName)
List<String>	getColumnNames() Deprecated.

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

getColumnCapabilitiesWithDefault, getType

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

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

Method Detail

getColumnNames

@Deprecated
List<String> getColumnNames()

Deprecated.

This method is apparently no longer used anymore, so deprecating it.

getColumnHolder

@Nullable
ColumnHolder getColumnHolder(String columnName)

getColumnCapabilities

@Nullable
default 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