Package org.h2.expression.aggregate

Class AggregateDataDistinctWithCounts

java.lang.Object

org.h2.expression.aggregate.AggregateData

org.h2.expression.aggregate.AggregateDataDistinctWithCounts

final class AggregateDataDistinctWithCounts
extends AggregateData

Data stored while calculating an aggregate that needs distinct values with their counts.

Field Summary

Fields

Modifier and Type	Field	Description
private final boolean	ignoreNulls
private final int	maxDistinctCount
private TreeMap<Value,LongDataCounter>	values

Constructor Summary

Constructors

Constructor	Description
AggregateDataDistinctWithCounts(boolean ignoreNulls, int maxDistinctCount)	Creates new instance of data for aggregate that needs distinct values with their counts.

Method Summary

Modifier and Type	Method	Description
(package private) void	add(SessionLocal session, Value v)	Add a value to this aggregate.
(package private) Value	getValue(SessionLocal session)	Get the aggregate result.
(package private) TreeMap<Value,LongDataCounter>	getValues()	Returns map with values and their counts.

Methods inherited from class java.lang.Object

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

Field Details

ignoreNulls

private final boolean ignoreNulls

maxDistinctCount

private final int maxDistinctCount

values

private TreeMap<Value,LongDataCounter> values

Constructor Details

AggregateDataDistinctWithCounts

AggregateDataDistinctWithCounts(boolean ignoreNulls,
 int maxDistinctCount)

Creates new instance of data for aggregate that needs distinct values with their counts.

Parameters:

ignoreNulls - whether NULL values should be ignored

maxDistinctCount - maximum count of distinct values to collect

Method Details

add

void add(SessionLocal session,
 Value v)

Description copied from class: AggregateData

Add a value to this aggregate.

Specified by:

add in class AggregateData

Parameters:

session - the session

v - the value

getValue

Value getValue(SessionLocal session)

Description copied from class: AggregateData

Get the aggregate result.

Specified by:

getValue in class AggregateData

Parameters:

session - the session

Returns:

the value

getValues

TreeMap<Value,LongDataCounter> getValues()

Returns map with values and their counts.

Returns:

map with values and their counts