io.druid.query.groupby.having

Interface HavingSpec

All Known Implementing Classes:

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

public interface HavingSpec

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.

Field Summary

Fields

Modifier and Type	Field and Description
static HavingSpec	ALWAYS
static HavingSpec	NEVER

Method Summary

Modifier and Type	Method and Description
boolean	eval(Row row) Evaluates if a given row satisfies the having spec.
void	setAggregators(Map<String,AggregatorFactory> aggregators)
void	setRowSignature(Map<String,ValueType> rowSignature) Informs this HavingSpec that rows passed to "eval" will have a certain signature.

Field Detail

NEVER

static final HavingSpec NEVER

ALWAYS

static final HavingSpec ALWAYS

Method Detail

setRowSignature

void setRowSignature(Map<String,ValueType> rowSignature)

Informs this HavingSpec that rows passed to "eval" will have a certain signature. Will be called before "eval".

Parameters:

rowSignature - signature of the rows

setAggregators

void setAggregators(Map<String,AggregatorFactory> aggregators)

eval

boolean eval(Row 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.