Package org.apache.calcite.rel.core

Class AsofJoin

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.BiRel

org.apache.calcite.rel.core.Join

org.apache.calcite.rel.core.AsofJoin

All Implemented Interfaces:

Cloneable, RelOptNode, Hintable, RelNode

Direct Known Subclasses:

EnumerableAsofJoin, LogicalAsofJoin

public abstract class AsofJoin
extends Join

Base class for various ASOF JOIN representations.

Nested Class Summary

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

RelNode.Context

Field Summary

Fields

Modifier and Type	Field	Description
protected final RexNode	matchCondition	Compared to standard joins, ASOF joins have an additional condition for comparing columns that usually contain timestamp values (however, the data type of these columns can be any type that supports comparisons, and is not restricted to be TIMESTAMP).

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

condition, hints, joinInfo, joinType, variablesSet

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

left, right

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

digest, id, rowType, traitSet

Constructor Summary

Constructors

Modifier	Constructor	Description
protected	AsofJoin(RelOptCluster cluster, RelTraitSet traitSet, List<RelHint> hints, RelNode left, RelNode right, RexNode condition, RexNode matchCondition, Set<CorrelationId> variablesSet, JoinRelType joinType)

Method Summary

Modifier and Type	Method	Description
RelWriter	explainTerms(RelWriter pw)	Describes the inputs and attributes of this relational expression.
RexNode	getMatchCondition()

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

accept, analyzeCondition, computeSelfCost, copy, copy, createJoinType, deepEquals0, deepHashCode0, deriveJoinRowType, deriveRowType, estimateJoinedRows, estimateRowCount, getCondition, getHints, getJoinType, getSystemFieldList, getVariablesSet, isSemiJoin, 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, deepEquals, deepHashCode, equals, explain, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getRelDigest, getRelTypeName, getRowType, getTable, getTraitSet, hashCode, isEnforcer, metadata, onRegister, recomputeDigest, register, sole, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface org.apache.calcite.rel.hint.Hintable

attachHints, withHints

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

explain, fieldIsNullable, stripped

Field Details

matchCondition

protected final RexNode matchCondition

Compared to standard joins, ASOF joins have an additional condition for comparing columns that usually contain timestamp values (however, the data type of these columns can be any type that supports comparisons, and is not restricted to be TIMESTAMP).

Constructor Details

AsofJoin

protected AsofJoin(RelOptCluster cluster,
 RelTraitSet traitSet,
 List<RelHint> hints,
 RelNode left,
 RelNode right,
 RexNode condition,
 RexNode matchCondition,
 Set<CorrelationId> variablesSet,
 JoinRelType joinType)

Method Details

getMatchCondition

public RexNode getMatchCondition()

explainTerms

public RelWriter explainTerms(RelWriter pw)

Description copied from class: AbstractRelNode

Describes the inputs and attributes of this relational expression. Each node should call super.explainTerms, then call the RelWriter.input(String, RelNode) and RelWriter.item(String, Object) methods for each input and attribute.

Overrides:

explainTerms in class Join

Parameters:

pw - Plan writer

Returns:

Plan writer for fluent-explain pattern