Package org.apache.calcite.rel.rules

Class HyperEdge

java.lang.Object

org.apache.calcite.rel.rules.HyperEdge

public class HyperEdge
extends Object

Edge in HyperGraph, that represents a join predicate.

Constructor Summary

Constructors

Constructor	Description
HyperEdge(org.apache.calcite.rel.rules.HyperEdge.TotalEligibilitySet tes, List<ConflictRule> conflictRules, long leftNodeUsedInPredicate, long rightNodeUsedInPredicate, long initialLeftNodeBits, long initialRightNodeBits, JoinRelType joinType, RexNode condition)

Method Summary

Modifier and Type	Method	Description
HyperEdge	accept(RexShuttle shuttle)
HyperEdge	adjustNodeBit(int nodeOffset)	When JoinToHyperGraphRule constructs a hypergraph , if the right child of Join is a HyperGraph class, all bitmaps related to inputs in this right child need to be shifted according to the number of inputs in the left child of Join.
static List<HyperEdge>	createHyperEdgesFromJoinConds(Map<Integer,Integer> inputRefToNodeIndexMap, Map<Integer,Integer> inputRefToFieldIndexMap, List<RexNode> joinConds, List<ConflictRule> conflictRules, JoinRelType joinType, int leftNodeCount, int nodeCount)	Build hyperedges corresponding to a join operator.
RexNode	getCondition()
List<ConflictRule>	getConflictRules()
long	getEndpoint()
long	getInitialLeftNodeBits()
long	getInitialRightNodeBits()
JoinRelType	getJoinType()
long	getLeftEndpoint()
long	getLeftNodeUsedInPredicate()
long	getRightEndpoint()
long	getRightNodeUsedInPredicate()
boolean	isSimple()
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Details

HyperEdge

public HyperEdge(org.apache.calcite.rel.rules.HyperEdge.TotalEligibilitySet tes,
 List<ConflictRule> conflictRules,
 long leftNodeUsedInPredicate,
 long rightNodeUsedInPredicate,
 long initialLeftNodeBits,
 long initialRightNodeBits,
 JoinRelType joinType,
 RexNode condition)

Method Details

getEndpoint

public long getEndpoint()

getLeftEndpoint

public long getLeftEndpoint()

getRightEndpoint

public long getRightEndpoint()

getLeftNodeUsedInPredicate

public long getLeftNodeUsedInPredicate()

getRightNodeUsedInPredicate

public long getRightNodeUsedInPredicate()

getConflictRules

public List<ConflictRule> getConflictRules()

getInitialLeftNodeBits

public long getInitialLeftNodeBits()

getInitialRightNodeBits

public long getInitialRightNodeBits()

isSimple

public boolean isSimple()

getJoinType

public JoinRelType getJoinType()

getCondition

public RexNode getCondition()

toString

public String toString()

Overrides:

toString in class Object

accept

public HyperEdge accept(RexShuttle shuttle)

adjustNodeBit

public HyperEdge adjustNodeBit(int nodeOffset)

When JoinToHyperGraphRule constructs a hypergraph , if the right child of Join is a HyperGraph class, all bitmaps related to inputs in this right child need to be shifted according to the number of inputs in the left child of Join.

Parameters:

nodeOffset - number of inputs in the left child

Returns:

HyperEdge produced after shifting

createHyperEdgesFromJoinConds

public static List<HyperEdge> createHyperEdgesFromJoinConds(Map<Integer,Integer> inputRefToNodeIndexMap,
 Map<Integer,Integer> inputRefToFieldIndexMap,
 List<RexNode> joinConds,
 List<ConflictRule> conflictRules,
 JoinRelType joinType,
 int leftNodeCount,
 int nodeCount)

Build hyperedges corresponding to a join operator. The construction of a HyperEdge includes total eligibility set, conflict rules, node-related bitmaps, predicate expressions (RexInputRef is replaced by RexNodeAndFieldIndex) and join type.

Parameters:

inputRefToNodeIndexMap - a map from inputRef to node index

inputRefToFieldIndexMap - a map from inputRef to field index

joinConds - join conditions

conflictRules - all conflict rules

joinType - join type

leftNodeCount - number of inputs in the left child of Join

nodeCount - number of inputs of Join

Returns:

HyperEdge list