Package org.apache.druid.query.filter

Class AbstractOptimizableDimFilter

java.lang.Object

org.apache.druid.query.filter.AbstractOptimizableDimFilter

All Implemented Interfaces:

Cacheable, DimFilter

Direct Known Subclasses:

AndDimFilter, BoundDimFilter, ColumnComparisonDimFilter, EqualityFilter, ExpressionDimFilter, ExtractionDimFilter, FalseDimFilter, InDimFilter, IntervalDimFilter, IsBooleanDimFilter, JavaScriptDimFilter, LikeDimFilter, NotDimFilter, NullFilter, OrDimFilter, RangeFilter, RegexDimFilter, SearchQueryDimFilter, SelectorDimFilter, SpatialDimFilter, TrueDimFilter

public abstract class AbstractOptimizableDimFilter
extends Object
implements DimFilter

Base class for DimFilters that support optimization. This abstract class provides a default implementation of toOptimizedFilter that relies on the existing optimize() and toFilter() methods. It uses a memoized supplier.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.druid.query.filter.DimFilter

DimFilter.DimFilterToStringBuilder

Constructor Summary

Constructors

Constructor	Description
AbstractOptimizableDimFilter()

Method Summary

Modifier and Type	Method	Description
Filter	toOptimizedFilter()

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.java.util.common.Cacheable

getCacheKey

Methods inherited from interface org.apache.druid.query.filter.DimFilter

getDimensionRangeSet, getRequiredColumns, optimize, toFilter

Constructor Detail

AbstractOptimizableDimFilter

public AbstractOptimizableDimFilter()

Method Detail

toOptimizedFilter

public Filter toOptimizedFilter()

Specified by:

toOptimizedFilter in interface DimFilter

Returns:

Return a Filter that implements this DimFilter, after applying optimizations to this DimFilter. A typical implementation will return the result of `optimize().toFilter()` See abstract base class AbstractOptimizableDimFilter for a common implementation shared by current DimFilters. The Filter returned by this method across multiple calls must be the same object: parts of the query stack compare Filters, and returning the same object allows these checks to avoid deep comparisons. (see for an example