io.druid.sql.calcite.rel

Class DruidSemiJoin

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

io.druid.sql.calcite.rel.DruidRel<DruidSemiJoin>

io.druid.sql.calcite.rel.DruidSemiJoin

All Implemented Interfaces:

Cloneable, org.apache.calcite.interpreter.BindableRel, org.apache.calcite.interpreter.InterpretableRel, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.RelNode, org.apache.calcite.runtime.ArrayBindable, org.apache.calcite.runtime.Bindable<Object[]>, org.apache.calcite.runtime.Typed

public class DruidSemiJoin
extends DruidRel<DruidSemiJoin>

DruidRel that has a main query, and also a subquery "right" that is used to filter the main query.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.interpreter.InterpretableRel

org.apache.calcite.interpreter.InterpretableRel.InterpreterImplementor

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.AbstractRelNode

digest, id, rowType, traitSet

Method Summary

Modifier and Type	Method and Description
DruidSemiJoin	asBindable()
DruidSemiJoin	asDruidConvention()
org.apache.calcite.plan.RelOptCost	computeSelfCost(org.apache.calcite.plan.RelOptPlanner planner, org.apache.calcite.rel.metadata.RelMetadataQuery mq)
org.apache.calcite.rel.RelNode	copy(org.apache.calcite.plan.RelTraitSet traitSet, List<org.apache.calcite.rel.RelNode> inputs)
static DruidSemiJoin	create(DruidRel left, DruidRel right, List<Integer> leftKeys, List<Integer> rightKeys, PlannerContext plannerContext)
protected org.apache.calcite.rel.type.RelDataType	deriveRowType()
org.apache.calcite.rel.RelWriter	explainTerms(org.apache.calcite.rel.RelWriter pw)
List<String>	getDatasourceNames() Get a list of names of datasources read by this DruidRel
List<org.apache.calcite.rel.RelNode>	getInputs()
PartialDruidQuery	getPartialDruidQuery()
int	getQueryCount() Return the number of Druid queries this rel involves, including sub-queries.
void	replaceInput(int ordinalInParent, org.apache.calcite.rel.RelNode p)
io.druid.java.util.common.guava.Sequence<Object[]>	runQuery()
DruidQuery	toDruidQuery(boolean finalizeAggregations) Convert this DruidRel to a DruidQuery.
DruidQuery	toDruidQueryForExplaining() Convert this DruidRel to a DruidQuery for purposes of explaining.
DruidSemiJoin	withPartialQuery(PartialDruidQuery newQueryBuilder)

Methods inherited from class io.druid.sql.calcite.rel.DruidRel

bind, getElementType, getPlannerContext, getQueryMaker, implement, isValidDruidQuery

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

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, estimateRowCount, explain, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, 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, estimateRowCount, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register

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

getCluster, getDescription, getDigest, getId, getTraitSet

Method Detail

create

public static DruidSemiJoin create(DruidRel left,
                                   DruidRel right,
                                   List<Integer> leftKeys,
                                   List<Integer> rightKeys,
                                   PlannerContext plannerContext)

getPartialDruidQuery

public PartialDruidQuery getPartialDruidQuery()

Specified by:

getPartialDruidQuery in class DruidRel<DruidSemiJoin>

withPartialQuery

public DruidSemiJoin withPartialQuery(PartialDruidQuery newQueryBuilder)

Specified by:

withPartialQuery in class DruidRel<DruidSemiJoin>

toDruidQuery

@Nullable
public DruidQuery toDruidQuery(boolean finalizeAggregations)

Description copied from class: DruidRel

Convert this DruidRel to a DruidQuery. This may be an expensive operation. For example, DruidSemiJoin needs to execute the right-hand side query in order to complete this method. This method may return null if it knows that this rel will yield an empty result set.

Specified by:

toDruidQuery in class DruidRel<DruidSemiJoin>

Parameters:

finalizeAggregations - true if this query should include explicit finalization for all of its aggregators, where required. Useful for subqueries where Druid's native query layer does not do this automatically.

Returns:

query, or null if it is known in advance that this rel will yield an empty result set.

toDruidQueryForExplaining

public DruidQuery toDruidQueryForExplaining()

Description copied from class: DruidRel

Convert this DruidRel to a DruidQuery for purposes of explaining. This must be an inexpensive operation. For example, DruidSemiJoin will use a dummy dataSource in order to complete this method, rather than executing the right-hand side query. This method may not return null.

Specified by:

toDruidQueryForExplaining in class DruidRel<DruidSemiJoin>

Returns:

query

asBindable

public DruidSemiJoin asBindable()

Specified by:

asBindable in class DruidRel<DruidSemiJoin>

asDruidConvention

public DruidSemiJoin asDruidConvention()

Specified by:

asDruidConvention in class DruidRel<DruidSemiJoin>

getDatasourceNames

public List<String> getDatasourceNames()

Description copied from class: DruidRel

Get a list of names of datasources read by this DruidRel

Specified by:

getDatasourceNames in class DruidRel<DruidSemiJoin>

getQueryCount

public int getQueryCount()

Description copied from class: DruidRel

Return the number of Druid queries this rel involves, including sub-queries. Simple queries will return 1.

Specified by:

getQueryCount in class DruidRel<DruidSemiJoin>

Returns:

number of nested queries

runQuery

public io.druid.java.util.common.guava.Sequence<Object[]> runQuery()

Specified by:

runQuery in class DruidRel<DruidSemiJoin>

deriveRowType

protected org.apache.calcite.rel.type.RelDataType deriveRowType()

Overrides:

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

getInputs

public List<org.apache.calcite.rel.RelNode> getInputs()

Specified by:

getInputs in interface org.apache.calcite.plan.RelOptNode

Specified by:

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

Overrides:

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

replaceInput

public void replaceInput(int ordinalInParent,
                         org.apache.calcite.rel.RelNode p)

Specified by:

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

Overrides:

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

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

explainTerms

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

Overrides:

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

computeSelfCost

public org.apache.calcite.plan.RelOptCost computeSelfCost(org.apache.calcite.plan.RelOptPlanner planner,
                                                          org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Specified by:

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

Overrides:

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