org.apache.druid.query.groupby.having

Interface HavingSpec

All Superinterfaces:

Cacheable

All Known Implementing Classes:

AlwaysHavingSpec, AndHavingSpec, DimensionSelectorHavingSpec, DimFilterHavingSpec, EqualToHavingSpec, GreaterThanHavingSpec, LessThanHavingSpec, NeverHavingSpec, NotHavingSpec, OrHavingSpec

public interface HavingSpec
extends Cacheable

A "having" clause that filters aggregated/dimension value. This is similar to SQL's "having" clause. HavingSpec objects are *not* thread-safe and must not be used simultaneously by multiple threads.

Method Summary

Modifier and Type	Method and Description
boolean	eval(ResultRow row) Evaluates if a given row satisfies the having spec.
void	setQuery(GroupByQuery query) Informs this HavingSpec that rows passed to "eval" will originate from a particular groupBy query.

Methods inherited from interface org.apache.druid.java.util.common.Cacheable

getCacheKey

Method Detail

setQuery

void setQuery(GroupByQuery query)

Informs this HavingSpec that rows passed to "eval" will originate from a particular groupBy query.

eval

boolean eval(ResultRow row)

Evaluates if a given row satisfies the having spec.

Parameters:

row - A Row of data that may contain aggregated values

Returns:

true if the given row satisfies the having spec. False otherwise.