org.apache.drill.exec.physical.base

Class ScanStats

java.lang.Object

org.apache.drill.exec.physical.base.ScanStats

public class ScanStats
extends Object

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	ScanStats.GroupScanProperty

Field Summary

Fields

Modifier and Type	Field and Description
static ScanStats	TRIVIAL_TABLE
static ScanStats	ZERO_RECORD_TABLE

Constructor Summary

Constructors

Constructor and Description
ScanStats(ScanStats.GroupScanProperty property, long recordCount, float cpuCost, float diskCost)

Method Summary

Methods

Modifier and Type	Method and Description
float	getCpuCost()
float	getDiskCost()
ScanStats.GroupScanProperty	getGroupScanProperty() Return if GroupScan knows the exact row count in the result of getSize() call.
long	getRecordCount()

Methods inherited from class java.lang.Object

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

Field Detail

TRIVIAL_TABLE

public static final ScanStats TRIVIAL_TABLE

ZERO_RECORD_TABLE

public static final ScanStats ZERO_RECORD_TABLE

Constructor Detail

ScanStats

public ScanStats(ScanStats.GroupScanProperty property,
         long recordCount,
         float cpuCost,
         float diskCost)

Method Detail

getRecordCount

public long getRecordCount()

getCpuCost

public float getCpuCost()

getDiskCost

public float getDiskCost()

getGroupScanProperty

public ScanStats.GroupScanProperty getGroupScanProperty()

Return if GroupScan knows the exact row count in the result of getSize() call. By default, groupscan does not know the exact row count, before it scans every rows. Currently, parquet group scan will return the exact row count.