org.apache.calcite.rel.core

Class Union

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.core.SetOp

org.apache.calcite.rel.core.Union

All Implemented Interfaces:

Cloneable, org.apache.calcite.plan.RelOptNode, org.apache.calcite.rel.hint.Hintable, org.apache.calcite.rel.RelNode

Direct Known Subclasses:

LogicalUnion

public abstract class Union
extends SetOp

Relational expression that returns the union of the rows of its inputs, optionally eliminating duplicates.

Temporarily copy from calcite to cherry-pick [CALCITE-5107] and will be removed when upgrade the latest calcite.

Corresponds to SQL UNION and UNION ALL.

Nested Class Summary

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.core.SetOp

all, hints, inputs, kind

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

digest, id, rowType, traitSet

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	Union(org.apache.calcite.rel.RelInput input) Creates a Union by parsing serialized output.
protected	Union(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traits, List<org.apache.calcite.rel.hint.RelHint> hints, List<org.apache.calcite.rel.RelNode> inputs, boolean all)
protected	Union(org.apache.calcite.plan.RelOptCluster cluster, org.apache.calcite.plan.RelTraitSet traits, List<org.apache.calcite.rel.RelNode> inputs, boolean all)

Method Summary

Modifier and Type	Method and Description
double	estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery mq)
static double	estimateRowCount(org.apache.calcite.rel.RelNode rel) Deprecated.

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

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

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

accept, 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, withHints

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

explain

Constructor Detail

Union

protected Union(org.apache.calcite.plan.RelOptCluster cluster,
                org.apache.calcite.plan.RelTraitSet traits,
                List<org.apache.calcite.rel.hint.RelHint> hints,
                List<org.apache.calcite.rel.RelNode> inputs,
                boolean all)

Union

protected Union(org.apache.calcite.plan.RelOptCluster cluster,
                org.apache.calcite.plan.RelTraitSet traits,
                List<org.apache.calcite.rel.RelNode> inputs,
                boolean all)

Union

protected Union(org.apache.calcite.rel.RelInput input)

Creates a Union by parsing serialized output.

Method Detail

estimateRowCount

public double estimateRowCount(org.apache.calcite.rel.metadata.RelMetadataQuery mq)

Specified by:

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

Overrides:

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

estimateRowCount

@Deprecated
public static double estimateRowCount(org.apache.calcite.rel.RelNode rel)

Deprecated.