Package org.apache.drill.exec.physical.base

Interface IndexGroupScan

All Superinterfaces:

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

public interface IndexGroupScan
extends GroupScan

An IndexGroupScan operator represents the scan associated with an Index.

Field Summary

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

ALL_COLUMNS

Method Summary

Modifier and Type	Method	Description
List<SchemaPath>	getColumns()	Returns a list of columns scanned by this group scan
double	getRowCount(org.apache.calcite.rex.RexNode condition, org.apache.calcite.rel.RelNode scanRel)	Get the row count after applying the RexNode condition
int	getRowKeyOrdinal()	Get the column ordinal of the rowkey column from the output schema of the IndexGroupScan
void	setColumns(List<SchemaPath> columns)
void	setParallelizationWidth(int width)
void	setRowCount(org.apache.calcite.rex.RexNode condition, double count, double capRowCount)	Set the artificial row count after applying the RexNode condition Mainly used for debugging
void	setStatistics(Statistics statistics)	Set the statistics for IndexGroupScan

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

accept

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

applyAssignments, applyFilter, applyLimit, canPushdownProjects, clone, enforceWidth, getAnalyzeInfoProvider, getColumnValueCount, getDigest, getFiles, getFilter, getMaxParallelizationWidth, getMetadataProvider, getMinParallelizationWidth, getPartitionColumns, getScanStats, getScanStats, getSelectionRoot, getSpecificScan, getTableMetadata, hasFiles, isDistributed, supportsFilterPushDown, supportsLimitPushdown, supportsPartitionFilterPushdown, usedMetastore

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

getDistributionAffinity, getOperatorAffinity

Methods inherited from interface java.lang.Iterable

forEach, iterator, spliterator

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

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

Method Details

getRowKeyOrdinal

int getRowKeyOrdinal()

Get the column ordinal of the rowkey column from the output schema of the IndexGroupScan

Returns:

column ordinal number

setRowCount

void setRowCount(org.apache.calcite.rex.RexNode condition,
 double count,
 double capRowCount)

Set the artificial row count after applying the RexNode condition Mainly used for debugging

Parameters:

condition - filter to apply

count - right index row count

capRowCount - row count limit

getRowCount

double getRowCount(org.apache.calcite.rex.RexNode condition,
 org.apache.calcite.rel.RelNode scanRel)

Get the row count after applying the RexNode condition

Parameters:

condition - filter to apply

scanRel - the current scan rel

Returns:

row count post filtering

setStatistics

void setStatistics(Statistics statistics)

Set the statistics for IndexGroupScan

Parameters:

statistics - which is necessary for index planning

setColumns

void setColumns(List<SchemaPath> columns)

getColumns

List<SchemaPath> getColumns()

Description copied from interface: GroupScan

Returns a list of columns scanned by this group scan

Specified by:

getColumns in interface GroupScan

setParallelizationWidth

void setParallelizationWidth(int width)