Package org.apache.druid.query

Class DimensionComparisonUtils

java.lang.Object

org.apache.druid.query.DimensionComparisonUtils

public class DimensionComparisonUtils
extends Object

Utility class to compare dimensions

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DimensionComparisonUtils.ArrayComparator<T>	Creates a list comparator with custom comparator for the elements.
static class	DimensionComparisonUtils.ArrayComparatorForUnnaturalStringComparator	Array comparator that converts the elements to their string representation, before comparing the values using the provided StringComparator.

Constructor Summary

Constructors

Constructor	Description
DimensionComparisonUtils()

Method Summary

Modifier and Type	Method	Description
static boolean	isNaturalComparator(ValueType type, StringComparator comparator)	Checks if the comparator is the natural comparator for the given type.

Methods inherited from class java.lang.Object

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

Constructor Details

DimensionComparisonUtils

public DimensionComparisonUtils()

Method Details

isNaturalComparator

public static boolean isNaturalComparator(ValueType type,
 StringComparator comparator)

Checks if the comparator is the natural comparator for the given type. Natural comparator for a type is the comparator that will yield the same results as a.compareTo(b) for objects a, b belonging to that valueType. In such cases, it'll be faster to directly use the comparison methods provided by Java or the library, as using the StringComparator would be slow. MSQ only supports natural comparators