org.apache.drill.exec.store.mock

Class MockGroupScanPOP

java.lang.Object

org.apache.drill.exec.physical.base.AbstractBase

org.apache.drill.exec.physical.base.AbstractGroupScan

org.apache.drill.exec.store.mock.MockGroupScanPOP

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, FragmentLeaf, GroupScan, HasAffinity, Leaf, PhysicalOperator, Scan

public class MockGroupScanPOP
extends AbstractGroupScan

Describes a "group" scan of a (logical) mock table. The mock table has a schema described by the MockTableDef.MockScanEntry. Class. To simulate a scan that can be parallelized, this group scan can contain a list of MockTableDef.MockScanEntry, each of which simulates a separate file on disk, or block within a file. Each will give rise to a separate minor fragment (assuming sufficient parallelization.)

Field Summary

Fields

Modifier and Type	Field and Description
protected List<MockTableDef.MockScanEntry>	readEntries The set of simulated files to scan.

Fields inherited from class org.apache.drill.exec.physical.base.AbstractBase

INIT_ALLOCATION, initialAllocation, MAX_ALLOCATION, maxAllocation

Fields inherited from interface org.apache.drill.exec.physical.base.GroupScan

ALL_COLUMNS, NO_COLUMN_STATS

Constructor Summary

Constructors

Constructor and Description
MockGroupScanPOP(String url, List<MockTableDef.MockScanEntry> readEntries)

Method Summary

Methods

Modifier and Type	Method and Description
void	applyAssignments(List<CoordinationProtos.DrillbitEndpoint> endpoints)
boolean	canPushdownProjects(List<SchemaPath> columns) GroupScan should check the list of columns, and see if it could support all the columns in the list.
GroupScan	clone(List<SchemaPath> columns) Returns a clone of GroupScan instance, except that the new GroupScan will use the provided list of columns .
String	getDigest() Returns a signature of the GroupScan which should usually be composed of all its attributes which could describe it uniquely.
int	getMaxParallelizationWidth()
PhysicalOperator	getNewWithChildren(List<PhysicalOperator> children) Regenerate with this node with a new set of children.
List<MockTableDef.MockScanEntry>	getReadEntries()
ScanStats	getScanStats()
SubScan	getSpecificScan(int minorFragmentId)
String	getUrl()
String	toString()

Methods inherited from class org.apache.drill.exec.physical.base.AbstractGroupScan

accept, applyLimit, enforceWidth, getColumnValueCount, getDistributionAffinity, getFiles, getInitialAllocation, getMaxAllocation, getMinParallelizationWidth, getOperatorAffinity, getOperatorType, getPartitionColumns, getScanStats, hasFiles, isExecutable, iterator, supportsLimitPushdown, supportsPartitionFilterPushdown

Methods inherited from class org.apache.drill.exec.physical.base.AbstractBase

accept, getCost, getOperatorId, getSVMode, getUserName, isBufferedOperator, setCost, setMaxAllocation, setOperatorId

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.drill.exec.physical.base.PhysicalOperator

getCost, getOperatorId, getSVMode, getUserName, isBufferedOperator, setCost, setMaxAllocation, setOperatorId

Methods inherited from interface org.apache.drill.common.graph.GraphValue

accept

Field Detail

readEntries

protected final List<MockTableDef.MockScanEntry> readEntries

The set of simulated files to scan.

Constructor Detail

MockGroupScanPOP

public MockGroupScanPOP(String url,
                List<MockTableDef.MockScanEntry> readEntries)

Method Detail

getScanStats

public ScanStats getScanStats()

Overrides:

getScanStats in class AbstractGroupScan

getUrl

public String getUrl()

getReadEntries

public List<MockTableDef.MockScanEntry> getReadEntries()

applyAssignments

public void applyAssignments(List<CoordinationProtos.DrillbitEndpoint> endpoints)

getSpecificScan

public SubScan getSpecificScan(int minorFragmentId)

getMaxParallelizationWidth

public int getMaxParallelizationWidth()

getNewWithChildren

public PhysicalOperator getNewWithChildren(List<PhysicalOperator> children)

Description copied from interface: PhysicalOperator

Regenerate with this node with a new set of children. This is used in the case of materialization or optimization.

Returns:

clone

public GroupScan clone(List<SchemaPath> columns)

Description copied from interface: GroupScan

Returns a clone of GroupScan instance, except that the new GroupScan will use the provided list of columns .

Specified by:

clone in interface GroupScan

Overrides:

clone in class AbstractGroupScan

getDigest

public String getDigest()

Description copied from interface: GroupScan

Returns a signature of the GroupScan which should usually be composed of all its attributes which could describe it uniquely.

toString

public String toString()

Overrides:

toString in class Object

canPushdownProjects

public boolean canPushdownProjects(List<SchemaPath> columns)

Description copied from interface: GroupScan

GroupScan should check the list of columns, and see if it could support all the columns in the list.

Specified by:

canPushdownProjects in interface GroupScan

Overrides:

canPushdownProjects in class AbstractGroupScan