org.apache.drill.exec.planner.index

Class AbstractIndexStatistics

java.lang.Object

org.apache.drill.exec.planner.index.AbstractIndexStatistics

All Implemented Interfaces:

IndexStatistics

public abstract class AbstractIndexStatistics
extends Object
implements IndexStatistics

Field Summary

Fields

Modifier and Type	Field and Description
protected org.apache.calcite.rex.RexNode	condition
protected org.apache.calcite.rel.RelNode	input
protected static org.slf4j.Logger	logger
protected DrillTable	table

Constructor Summary

Constructors

Constructor and Description
AbstractIndexStatistics(org.apache.calcite.rel.RelNode input, org.apache.calcite.rex.RexNode condition, DrillTable table)

Method Summary

Modifier and Type	Method and Description
List<org.apache.calcite.rel.RelCollation>	getCollations() Returns the collections of columns on which this table is sorted.
org.apache.calcite.rel.RelDistribution	getDistribution() Returns the distribution of the data in query result table.
abstract double	getRowCount() Returns the approximate number of rows in the table.

Methods inherited from class java.lang.Object

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

Field Detail

logger

protected static final org.slf4j.Logger logger

input

protected final org.apache.calcite.rel.RelNode input

condition

protected final org.apache.calcite.rex.RexNode condition

table

protected final DrillTable table

Constructor Detail

AbstractIndexStatistics

public AbstractIndexStatistics(org.apache.calcite.rel.RelNode input,
                               org.apache.calcite.rex.RexNode condition,
                               DrillTable table)

Method Detail

getRowCount

public abstract double getRowCount()

Description copied from interface: IndexStatistics

Returns the approximate number of rows in the table.

Specified by:

getRowCount in interface IndexStatistics

getCollations

public List<org.apache.calcite.rel.RelCollation> getCollations()

Description copied from interface: IndexStatistics

Returns the collections of columns on which this table is sorted.

Specified by:

getCollations in interface IndexStatistics

getDistribution

public org.apache.calcite.rel.RelDistribution getDistribution()

Description copied from interface: IndexStatistics

Returns the distribution of the data in query result table.

Specified by:

getDistribution in interface IndexStatistics