org.apache.calcite.schema

Class Statistics

java.lang.Object

org.apache.calcite.schema.Statistics

public class Statistics
extends Object

Utility functions regarding Statistic.

Field Summary

Fields

Modifier and Type	Field and Description
static Statistic	UNKNOWN Returns a Statistic that knows nothing about a table.

Method Summary

Methods

Modifier and Type	Method and Description
static Statistic	of(double rowCount, List<ImmutableBitSet> keys) Returns a statistic with a given row count and set of unique keys.
static Statistic	of(double rowCount, List<ImmutableBitSet> keys, List<RelCollation> collations) Returns a statistic with a given row count and set of unique keys.

Methods inherited from class java.lang.Object

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

Field Detail

UNKNOWN

public static final Statistic UNKNOWN

Returns a Statistic that knows nothing about a table.

Method Detail

of

public static Statistic of(double rowCount,
           List<ImmutableBitSet> keys)

Returns a statistic with a given row count and set of unique keys.

of

public static Statistic of(double rowCount,
           List<ImmutableBitSet> keys,
           List<RelCollation> collations)

Returns a statistic with a given row count and set of unique keys.