org.apache.hadoop.hive.ql.optimizer.calcite.reloperators

Class HiveTableScan

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.TableScan

org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveTableScan

All Implemented Interfaces:

Cloneable, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.RelNode, HiveRelNode

public class HiveTableScan
extends org.apache.calcite.rel.core.TableScan
implements HiveRelNode

Relational expression representing a scan of a HiveDB collection.

Additional operations might be applied, using the "find" or "aggregate" methods.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveRelNode

HiveRelNode.Implementor

Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode

org.apache.calcite.rel.RelNode.Context

Field Summary

Fields inherited from class org.apache.calcite.rel.core.TableScan

table

Fields inherited from class org.apache.calcite.rel.AbstractRelNode

digest, id, rowType, traitSet

Fields inherited from interface org.apache.hadoop.hive.ql.optimizer.calcite.reloperators.HiveRelNode

CONVENTION

Constructor Summary

Constructors

Constructor and Description
HiveTableScan(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traitSet, RelOptHiveTable table, String alias, String concatQbIDAlias, boolean useQBIdInDigest, boolean insideView) Creates a HiveTableScan.

Method Summary

Modifier and Type	Method and Description
String	computeDigest()
HiveTableScan	copy(org.apache.calcite.rel.type.RelDataType newRowtype) Copy TableScan operator with a new Row Schema.
org.apache.calcite.rel.RelNode	copy(org.apache.calcite.plan.RelTraitSet traitSet, List<org.apache.calcite.rel.RelNode> inputs)
double	estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery mq)
org.apache.calcite.rel.RelWriter	explainTerms(org.apache.calcite.rel.RelWriter pw)
List<ColStatistics>	getColStat(List<Integer> projIndxLst)
String	getConcatQbIDAlias()
List<Integer>	getNeededColIndxsFrmReloptHT()
Set<Integer>	getPartOrVirtualCols()
org.apache.calcite.rel.type.RelDataType	getPrunedRowType()
String	getTableAlias()
Set<Integer>	getVirtualCols()
void	implement(HiveRelNode.Implementor implementor)
boolean	isInsideView()
org.apache.calcite.rel.RelNode	project(org.apache.calcite.util.ImmutableBitSet fieldsUsed, Set<org.apache.calcite.rel.type.RelDataTypeField> extraFields, org.apache.calcite.tools.RelBuilder relBuilder)
void	register(org.apache.calcite.plan.RelOptPlanner planner)

Methods inherited from class org.apache.calcite.rel.core.TableScan

accept, computeSelfCost, deriveRowType, getCollationList, getTable, identity, identity

Methods inherited from class org.apache.calcite.rel.AbstractRelNode

accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, explain, getChildExps, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, replaceInput, sole, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.rel.RelNode

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, computeSelfCost, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, replaceInput

Methods inherited from interface org.apache.calcite.plan.RelOptNode

getCluster, getDescription, getDigest, getId, getTraitSet

Constructor Detail

HiveTableScan

public HiveTableScan(org.apache.calcite.plan.RelOptCluster cluster,
                     org.apache.calcite.plan.RelTraitSet traitSet,
                     RelOptHiveTable table,
                     String alias,
                     String concatQbIDAlias,
                     boolean useQBIdInDigest,
                     boolean insideView)

Creates a HiveTableScan.

Parameters:

cluster - Cluster

traitSet - Traits

table - Table

table - HiveDB table

Method Detail

getTableAlias

public String getTableAlias()

getConcatQbIDAlias

public String getConcatQbIDAlias()

copy

public org.apache.calcite.rel.RelNode copy(org.apache.calcite.plan.RelTraitSet traitSet,
                                           List<org.apache.calcite.rel.RelNode> inputs)

Specified by:

copy in interface org.apache.calcite.rel.RelNode

Overrides:

copy in class org.apache.calcite.rel.AbstractRelNode

copy

public HiveTableScan copy(org.apache.calcite.rel.type.RelDataType newRowtype)

Copy TableScan operator with a new Row Schema. The new Row Schema can only be a subset of this TS schema.

Parameters:

newRowtype -

Returns:

explainTerms

public org.apache.calcite.rel.RelWriter explainTerms(org.apache.calcite.rel.RelWriter pw)

Overrides:

explainTerms in class org.apache.calcite.rel.core.TableScan

register

public void register(org.apache.calcite.plan.RelOptPlanner planner)

Specified by:

register in interface org.apache.calcite.rel.RelNode

Overrides:

register in class org.apache.calcite.rel.AbstractRelNode

implement

public void implement(HiveRelNode.Implementor implementor)

Specified by:

implement in interface HiveRelNode

estimateRowCount

public double estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Specified by:

estimateRowCount in interface org.apache.calcite.rel.RelNode

Overrides:

estimateRowCount in class org.apache.calcite.rel.core.TableScan

getColStat

public List<ColStatistics> getColStat(List<Integer> projIndxLst)

project

public org.apache.calcite.rel.RelNode project(org.apache.calcite.util.ImmutableBitSet fieldsUsed,
                                              Set<org.apache.calcite.rel.type.RelDataTypeField> extraFields,
                                              org.apache.calcite.tools.RelBuilder relBuilder)

Overrides:

project in class org.apache.calcite.rel.core.TableScan

getNeededColIndxsFrmReloptHT

public List<Integer> getNeededColIndxsFrmReloptHT()

getPrunedRowType

public org.apache.calcite.rel.type.RelDataType getPrunedRowType()

getPartOrVirtualCols

public Set<Integer> getPartOrVirtualCols()

getVirtualCols

public Set<Integer> getVirtualCols()

isInsideView

public boolean isInsideView()

computeDigest

public String computeDigest()

Overrides:

computeDigest in class org.apache.calcite.rel.AbstractRelNode