org.apache.drill.exec.planner.physical

Class JoinPrel

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.BiRel

org.apache.calcite.rel.core.Join

org.apache.drill.exec.planner.common.DrillJoinRelBase

org.apache.drill.exec.planner.physical.JoinPrel

All Implemented Interfaces:

Cloneable, Iterable<Prel>, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.RelNode, DrillRelNode, Prel

Direct Known Subclasses:

HashJoinPrel, MergeJoinPrel, NestedLoopJoinPrel

public abstract class JoinPrel
extends DrillJoinRelBase
implements Prel

Base class for MergeJoinPrel and HashJoinPrel

Field Summary

Fields

Modifier and Type	Field and Description
protected JoinUtils.JoinCategory	joincategory

Fields inherited from class org.apache.drill.exec.planner.common.DrillJoinRelBase

filterNulls, leftKeys, rightKeys

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

condition, joinType, variablesStopped

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

left, right

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

digest, id, rowType, traitSet

Fields inherited from interface org.apache.drill.exec.planner.physical.Prel

DRILL_PHYSICAL

Constructor Summary

Constructors

Constructor and Description
JoinPrel(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traits, org.apache.calcite.rel.RelNode left, org.apache.calcite.rel.RelNode right, org.apache.calcite.rex.RexNode condition, org.apache.calcite.rel.core.JoinRelType joinType)

Method Summary

Methods

Modifier and Type	Method and Description
<T,X,E extends Throwable> T	accept(PrelVisitor<T,X,E> logicalVisitor, X value)
protected void	buildJoinConditions(List<JoinCondition> conditions, List<String> leftFields, List<String> rightFields, List<Integer> leftKeys, List<Integer> rightKeys) Build the list of join conditions for this join.
org.apache.calcite.rel.RelNode	getJoinInput(int offset, org.apache.calcite.rel.RelNode input) Check to make sure that the fields of the inputs are the same as the output field names.
Iterator<Prel>	iterator()
boolean	needsFinalColumnReordering()

Methods inherited from class org.apache.drill.exec.planner.common.DrillJoinRelBase

computeCartesianJoinCost, computeHashJoinCost, computeLogicalJoinCost, computeSelfCost, estimateRowCount, getLeftKeys, getRightKeys, isUnique, uniqueFieldNames

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

accept, analyzeCondition, copy, copy, createJoinType, deriveJoinRowType, deriveRowType, estimateJoinedRows, explainTerms, getChildExps, getCondition, getJoinType, getSystemFieldList, getVariablesStopped, isSemiJoinDone, isValid_

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

childrenAccept, getInputs, getLeft, getRight, replaceInput

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

accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, 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.drill.exec.planner.physical.Prel

getEncoding, getPhysicalOperator, getSupportedEncodings

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

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

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

getCluster, getDescription, getDigest, getId, getTraitSet

Field Detail

joincategory

protected JoinUtils.JoinCategory joincategory

Constructor Detail

JoinPrel

public JoinPrel(org.apache.calcite.plan.RelOptCluster cluster,
        org.apache.calcite.plan.RelTraitSet traits,
        org.apache.calcite.rel.RelNode left,
        org.apache.calcite.rel.RelNode right,
        org.apache.calcite.rex.RexNode condition,
        org.apache.calcite.rel.core.JoinRelType joinType)
         throws org.apache.calcite.rel.InvalidRelException

Throws:

org.apache.calcite.rel.InvalidRelException

Method Detail

accept

public <T,X,E extends Throwable> T accept(PrelVisitor<T,X,E> logicalVisitor,
                                 X value)
         throws E extends Throwable

Specified by:

accept in interface Prel

Throws:

E extends Throwable

iterator

public Iterator<Prel> iterator()

Specified by:

iterator in interface Iterable<Prel>

getJoinInput

public org.apache.calcite.rel.RelNode getJoinInput(int offset,
                                          org.apache.calcite.rel.RelNode input)

Check to make sure that the fields of the inputs are the same as the output field names. If not, insert a project renaming them.

Parameters:

implementor -

i -

offset -

input -

Returns:

needsFinalColumnReordering

public boolean needsFinalColumnReordering()

Specified by:

needsFinalColumnReordering in interface Prel

buildJoinConditions

protected void buildJoinConditions(List<JoinCondition> conditions,
                       List<String> leftFields,
                       List<String> rightFields,
                       List<Integer> leftKeys,
                       List<Integer> rightKeys)

Build the list of join conditions for this join. A join condition is built only for equality and IS NOT DISTINCT FROM comparisons. The difference is: null == null is FALSE whereas null IS NOT DISTINCT FROM null is TRUE For a use case of the IS NOT DISTINCT FROM comparison, see org.apache.calcite.rel.rules.RemoveDistinctAggregateRule

Parameters:

conditions - populated list of join conditions

leftFields - join fields from the left input

rightFields - join fields from the right input