Package org.apache.druid.query.groupby.epinephelinae.vector

Class DictionaryBuildingSingleValueStringGroupByVectorColumnSelector

java.lang.Object

org.apache.druid.query.groupby.epinephelinae.vector.DictionaryBuildingGroupByVectorColumnSelector<String>

org.apache.druid.query.groupby.epinephelinae.vector.DictionaryBuildingSingleValueStringGroupByVectorColumnSelector

All Implemented Interfaces:

GroupingSelector, GroupByVectorColumnSelector

public class DictionaryBuildingSingleValueStringGroupByVectorColumnSelector
extends DictionaryBuildingGroupByVectorColumnSelector<String>

A GroupByVectorColumnSelector that builds an internal String<->Integer dictionary, used for grouping single-valued STRING columns which are not natively dictionary encoded, e.g. expression virtual columns.

See Also:

• similar selector for complex columns
• which creates the nonvectorized version

Field Summary

Fields inherited from class org.apache.druid.query.groupby.epinephelinae.vector.DictionaryBuildingGroupByVectorColumnSelector

dimensionIdCodec, selector

Constructor Summary

Constructors

Constructor	Description
DictionaryBuildingSingleValueStringGroupByVectorColumnSelector(VectorObjectSelector selector)

Method Summary

Modifier and Type	Method	Description
protected String	convertValue(Object rawValue)	Convert raw value from the vector to the appropriate type for this selector.

Methods inherited from class org.apache.druid.query.groupby.epinephelinae.vector.DictionaryBuildingGroupByVectorColumnSelector

getGroupingKeySize, reset, writeKeys, writeKeyToResultRow

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.query.groupby.epinephelinae.GroupingSelector

getValueCardinality

Constructor Details

DictionaryBuildingSingleValueStringGroupByVectorColumnSelector

public DictionaryBuildingSingleValueStringGroupByVectorColumnSelector(VectorObjectSelector selector)

Method Details

convertValue

protected String convertValue(Object rawValue)

Description copied from class: DictionaryBuildingGroupByVectorColumnSelector

Convert raw value from the vector to the appropriate type for this selector.

Specified by:

convertValue in class DictionaryBuildingGroupByVectorColumnSelector<String>