Package org.apache.drill.exec.store.druid

Class DruidSubScan

java.lang.Object

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

org.apache.drill.exec.store.druid.DruidSubScan

All Implemented Interfaces:

Iterable<PhysicalOperator>, GraphValue<PhysicalOperator>, FragmentLeaf, Leaf, PhysicalOperator, Scan, SubScan

public class DruidSubScan
extends AbstractBase
implements SubScan

A Class containing information to read a single druid data source.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	DruidSubScan.DruidSubScanSpec

Field Summary

Fields

Modifier and Type	Field	Description
static final String	OPERATOR_TYPE

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

INIT_ALLOCATION, initialAllocation, MAX_ALLOCATION, maxAllocation, userName

Constructor Summary

Constructors

Constructor	Description
DruidSubScan(String userName, DruidStoragePlugin plugin, List<DruidSubScan.DruidSubScanSpec> dataSourceInfoList, List<SchemaPath> columns, int maxRecordsToRead)
DruidSubScan(StoragePluginRegistry registry, String userName, StoragePluginConfig config, LinkedList<DruidSubScan.DruidSubScanSpec> datasourceScanSpecList, List<SchemaPath> columns, int maxRecordsToRead)

Method Summary

Modifier and Type	Method	Description
<T, X, E extends Throwable> T	accept(PhysicalVisitor<T,X,E> physicalVisitor, X value)	Provides capability to build a set of output based on traversing a query graph tree.
List<SchemaPath>	getColumns()
int	getMaxRecordsToRead()
PhysicalOperator	getNewWithChildren(List<PhysicalOperator> children)	Regenerate with this node with a new set of children.
String	getOperatorType()
List<DruidSubScan.DruidSubScanSpec>	getScanSpec()
DruidStoragePlugin	getStorageEngine()
boolean	isExecutable()	Describes whether or not a particular physical operator can actually be executed.
Iterator<PhysicalOperator>	iterator()

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

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

Methods inherited from class java.lang.Object

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

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

accept

Methods inherited from interface java.lang.Iterable

forEach, spliterator

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

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

Field Details

OPERATOR_TYPE

public static final String OPERATOR_TYPE

See Also:

• Constant Field Values

Constructor Details

DruidSubScan

public DruidSubScan(StoragePluginRegistry registry,
 String userName,
 StoragePluginConfig config,
 LinkedList<DruidSubScan.DruidSubScanSpec> datasourceScanSpecList,
 List<SchemaPath> columns,
 int maxRecordsToRead)

DruidSubScan

public DruidSubScan(String userName,
 DruidStoragePlugin plugin,
 List<DruidSubScan.DruidSubScanSpec> dataSourceInfoList,
 List<SchemaPath> columns,
 int maxRecordsToRead)

Method Details

accept

public <T,
X,
E extends Throwable> T accept(PhysicalVisitor<T,X,E> physicalVisitor,
 X value)
                                     throws E

Description copied from interface: PhysicalOperator

Provides capability to build a set of output based on traversing a query graph tree.

Specified by:

accept in interface PhysicalOperator

Parameters:

physicalVisitor -

Throws:

E

getScanSpec

public List<DruidSubScan.DruidSubScanSpec> getScanSpec()

getColumns

public List<SchemaPath> getColumns()

getMaxRecordsToRead

public int getMaxRecordsToRead()

isExecutable

public boolean isExecutable()

Description copied from interface: PhysicalOperator

Describes whether or not a particular physical operator can actually be executed. Most physical operators can be executed. However, Exchange nodes cannot be executed. In order to be executed, they must be converted into their Exec sub components.

Specified by:

isExecutable in interface PhysicalOperator

Overrides:

isExecutable in class AbstractBase

getStorageEngine

public DruidStoragePlugin getStorageEngine()

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.

Specified by:

getNewWithChildren in interface PhysicalOperator

Parameters:

children -

getOperatorType

public String getOperatorType()

Specified by:

getOperatorType in interface PhysicalOperator

iterator

public Iterator<PhysicalOperator> iterator()

Specified by:

iterator in interface Iterable<PhysicalOperator>