Package org.apache.calcite.rel.logical

Class LogicalUnion

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.SetOp

org.apache.calcite.rel.core.Union

org.apache.calcite.rel.logical.LogicalUnion

All Implemented Interfaces:

Cloneable, RelOptNode, Hintable, RelNode

public final class LogicalUnion
extends Union

Sub-class of Union not targeted at any particular engine or calling convention.

Nested Class Summary

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

RelNode.Context

Field Summary

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

all, hints, inputs, kind

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

digest, id, rowType, traitSet

Constructor Summary

Constructors

Constructor	Description
LogicalUnion(RelOptCluster cluster, List<RelNode> inputs, boolean all)	Deprecated.
LogicalUnion(RelOptCluster cluster, RelTraitSet traitSet, List<RelHint> hints, List<RelNode> inputs, boolean all)	Creates a LogicalUnion.
LogicalUnion(RelOptCluster cluster, RelTraitSet traitSet, List<RelNode> inputs, boolean all)	Creates a LogicalUnion.
LogicalUnion(RelInput input)	Creates a LogicalUnion by parsing serialized output.

Method Summary

Modifier and Type	Method	Description
RelNode	accept(RelShuttle shuttle)	Accepts a visit from a shuttle.
LogicalUnion	copy(RelTraitSet traitSet, List<RelNode> inputs, boolean all)
static LogicalUnion	create(List<RelNode> inputs, boolean all)	Creates a LogicalUnion.
RelNode	withHints(List<RelHint> hintList)	Returns a new relational expression with the specified hints hintList.

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

estimateRowCount, estimateRowCount

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

copy, deriveRowType, explainTerms, getHints, getInputs, isHomogeneous, replaceInput

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

accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, deepEquals, deepHashCode, equals, explain, getCluster, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getRelDigest, getRelTypeName, getRowType, getTable, getTraitSet, getVariablesSet, hashCode, isEnforcer, isValid, 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

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

explain, fieldIsNullable, stripped

Constructor Details

LogicalUnion

public LogicalUnion(RelOptCluster cluster,
 RelTraitSet traitSet,
 List<RelHint> hints,
 List<RelNode> inputs,
 boolean all)

Creates a LogicalUnion.

Use create(java.util.List<org.apache.calcite.rel.RelNode>, boolean) unless you know what you're doing.

LogicalUnion

public LogicalUnion(RelOptCluster cluster,
 RelTraitSet traitSet,
 List<RelNode> inputs,
 boolean all)

Creates a LogicalUnion.

Use create(java.util.List<org.apache.calcite.rel.RelNode>, boolean) unless you know what you're doing.

LogicalUnion

@Deprecated
public LogicalUnion(RelOptCluster cluster,
 List<RelNode> inputs,
 boolean all)

Deprecated.

LogicalUnion

public LogicalUnion(RelInput input)

Creates a LogicalUnion by parsing serialized output.

Method Details

create

public static LogicalUnion create(List<RelNode> inputs,
 boolean all)

Creates a LogicalUnion.

copy

public LogicalUnion copy(RelTraitSet traitSet,
 List<RelNode> inputs,
 boolean all)

Specified by:

copy in class SetOp

accept

public RelNode accept(RelShuttle shuttle)

Description copied from interface: RelNode

Accepts a visit from a shuttle.

Specified by:

accept in interface RelNode

Overrides:

accept in class AbstractRelNode

Parameters:

shuttle - Shuttle

Returns:

A copy of this node incorporating changes made by the shuttle to this node's children

withHints

public RelNode withHints(List<RelHint> hintList)

Description copied from interface: Hintable

Returns a new relational expression with the specified hints hintList.

This method should be overridden by every logical node that supports hint. It is only for internal use during decorrelation.

Sub-class should return a new copy of the relational expression.

The default implementation returns the relational expression directly only because not every kind of relational expression supports hints.

Returns:

Relational expression with set up hints