Package org.apache.drill.exec.store.splunk

Class SplunkGroupScan

java.lang.Object

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

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

org.apache.drill.exec.store.splunk.SplunkGroupScan

All Implemented Interfaces:

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

public class SplunkGroupScan
extends AbstractGroupScan

Field Summary

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

INIT_ALLOCATION, initialAllocation, MAX_ALLOCATION, maxAllocation, userName

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

ALL_COLUMNS

Constructor Summary

Constructors

Constructor	Description
SplunkGroupScan(SplunkGroupScan that)	Copies the group scan during many stages of Calcite operation.
SplunkGroupScan(SplunkGroupScan that, int maxRecords)	Adds a limit to the group scan
SplunkGroupScan(SplunkGroupScan that, List<SchemaPath> columns)	Applies columns.
SplunkGroupScan(SplunkGroupScan that, Map<String,ExprNode.ColRelOpConstNode> filters, double filterSelectivity)	Adds a filter to the scan.
SplunkGroupScan(SplunkPluginConfig config, List<SchemaPath> columns, SplunkScanSpec splunkScanSpec, Map<String,ExprNode.ColRelOpConstNode> filters, double selectivity, int maxRecords)	Deserialize a group scan.
SplunkGroupScan(SplunkScanSpec scanSpec, MetadataProviderManager metadataProviderManager)	Creates a new group scan from the storage plugin.

Method Summary

Modifier and Type	Method	Description
boolean	allowsFilters()
void	applyAssignments(List<CoordinationProtos.DrillbitEndpoint> endpoints)
GroupScan	applyLimit(int maxRecords)	By default, return null to indicate row count based prune is not supported.
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 .
List<SchemaPath>	columns()
SplunkPluginConfig	config()
boolean	equals(Object obj)
Map<String,ExprNode.ColRelOpConstNode>	filters()
String	getDigest()	Returns a signature of the GroupScan which should usually be composed of all its attributes which could describe it uniquely.
int	getMaxParallelizationWidth()
TableMetadataProvider	getMetadataProvider()	Returns TableMetadataProvider instance which is used for providing metadata for current GroupScan.
PhysicalOperator	getNewWithChildren(List<PhysicalOperator> children)	Regenerate with this node with a new set of children.
ScanStats	getScanStats()
TupleMetadata	getSchema()
SubScan	getSpecificScan(int minorFragmentId)
boolean	hasFilters()
int	hashCode()
boolean	hasLimit()
int	maxRecords()
double	selectivity()
SplunkScanSpec	splunkScanSpec()
boolean	supportsLimitPushdown()	Default is not to support limit pushdown.
String	toString()

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

accept, applyFilter, enforceWidth, getAnalyzeInfoProvider, getColumns, getColumnValueCount, getDistributionAffinity, getFiles, getFilter, getInitialAllocation, getMaxAllocation, getMinParallelizationWidth, getOperatorAffinity, getOperatorType, getPartitionColumns, getScanStats, getScanStats, getSelectionRoot, getTableMetadata, hasFiles, isDistributed, isExecutable, iterator, supportsFilterPushDown, supportsPartitionFilterPushdown, usedMetastore

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, finalize, getClass, notify, notifyAll, 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, getOperatorId, getSVMode, getUserName, isBufferedOperator, setCost, setMaxAllocation, setOperatorId

Constructor Details

SplunkGroupScan

public SplunkGroupScan(SplunkScanSpec scanSpec,
 MetadataProviderManager metadataProviderManager)

Creates a new group scan from the storage plugin.

SplunkGroupScan

public SplunkGroupScan(SplunkGroupScan that)

Copies the group scan during many stages of Calcite operation.

SplunkGroupScan

public SplunkGroupScan(SplunkGroupScan that,
 List<SchemaPath> columns)

Applies columns. Oddly called multiple times, even when the scan already has columns.

SplunkGroupScan

public SplunkGroupScan(SplunkGroupScan that,
 Map<String,ExprNode.ColRelOpConstNode> filters,
 double filterSelectivity)

Adds a filter to the scan.

SplunkGroupScan

public SplunkGroupScan(SplunkPluginConfig config,
 List<SchemaPath> columns,
 SplunkScanSpec splunkScanSpec,
 Map<String,ExprNode.ColRelOpConstNode> filters,
 double selectivity,
 int maxRecords)

Deserialize a group scan. Not called in normal operation. Probably used only if Drill executes a logical plan.

SplunkGroupScan

public SplunkGroupScan(SplunkGroupScan that,
 int maxRecords)

Adds a limit to the group scan

Parameters:

that - Previous SplunkGroupScan

maxRecords - the limit pushdown

Method Details

config

public SplunkPluginConfig config()

columns

public List<SchemaPath> columns()

splunkScanSpec

public SplunkScanSpec splunkScanSpec()

filters

public Map<String,ExprNode.ColRelOpConstNode> filters()

maxRecords

public int maxRecords()

selectivity

public double selectivity()

applyAssignments

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

getSpecificScan

public SubScan getSpecificScan(int minorFragmentId)

getMaxParallelizationWidth

public int getMaxParallelizationWidth()

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

supportsLimitPushdown

public boolean supportsLimitPushdown()

Description copied from class: AbstractGroupScan

Default is not to support limit pushdown.

Specified by:

supportsLimitPushdown in interface GroupScan

Overrides:

supportsLimitPushdown in class AbstractGroupScan

applyLimit

public GroupScan applyLimit(int maxRecords)

Description copied from class: AbstractGroupScan

By default, return null to indicate row count based prune is not supported. Each group scan subclass should override, if it supports row count based prune.

Specified by:

applyLimit in interface GroupScan

Overrides:

applyLimit in class AbstractGroupScan

Parameters:

maxRecords - : the number of rows requested from group scan.

Returns:

a new instance of group scan if the prune is successful. null when either if row-based prune is not supported, or if prune is not successful.

getSchema

public TupleMetadata getSchema()

getMetadataProvider

public TableMetadataProvider getMetadataProvider()

Description copied from interface: GroupScan

Returns TableMetadataProvider instance which is used for providing metadata for current GroupScan.

Specified by:

getMetadataProvider in interface GroupScan

Overrides:

getMetadataProvider in class AbstractGroupScan

Returns:

TableMetadataProvider instance the source of metadata

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.

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.

getScanStats

public ScanStats getScanStats()

Overrides:

getScanStats in class AbstractGroupScan

hasFilters

public boolean hasFilters()

hasLimit

public boolean hasLimit()

allowsFilters

public boolean allowsFilters()

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

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

toString

public String toString()

Overrides:

toString in class Object