Package org.apache.calcite.adapter.enumerable

Class EnumerableProject

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Project

org.apache.calcite.adapter.enumerable.EnumerableProject

All Implemented Interfaces:

Cloneable, EnumerableRel, RelOptNode, Hintable, PhysicalNode, RelNode

public class EnumerableProject
extends Project
implements EnumerableRel

Implementation of Project in enumerable calling convention.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.rel.core.Project

Project.Flags

Nested classes/interfaces inherited from interface org.apache.calcite.adapter.enumerable.EnumerableRel

EnumerableRel.Prefer, EnumerableRel.Result

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

RelNode.Context

Field Summary

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

exps, hints, variablesSet

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

input

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

digest, id, rowType, traitSet

Constructor Summary

Constructors

Constructor	Description
EnumerableProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, List<? extends RexNode> projects, RelDataType rowType)	Creates an EnumerableProject.
EnumerableProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, List<? extends RexNode> projects, RelDataType rowType, int flags)	Deprecated.

Method Summary

Modifier and Type	Method	Description
EnumerableProject	copy(RelTraitSet traitSet, RelNode input, List<RexNode> projects, RelDataType rowType)	Copies a project.
static EnumerableProject	create(RelNode input, List<? extends RexNode> projects, RelDataType rowType)	Creates an EnumerableProject, specifying row type rather than field names.
@Nullable Pair<RelTraitSet,List<RelTraitSet>>	deriveTraits(RelTraitSet childTraits, int childId)	Derive traitset from child node, returns a pair of traits after traits derivation.
EnumerableRel.Result	implement(EnumerableRelImplementor implementor, EnumerableRel.Prefer pref)	Creates a plan for this expression according to a calling convention.
@Nullable Pair<RelTraitSet,List<RelTraitSet>>	passThroughTraits(RelTraitSet required)	Pass required traitset from parent node to child nodes, returns a pair of traits after traits is passed down.

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

accept, computeSelfCost, containsOver, copy, copy, deepEquals0, deepHashCode0, explainTerms, getAliasedProjects, getFlags, getHints, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, getProjects, getVariablesSet, isBoxed, isMapping, isValid

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

childrenAccept, deriveRowType, estimateRowCount, getInput, getInputs, 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.adapter.enumerable.EnumerableRel

getDeriveMode

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

attachHints, withHints

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

derive, derive, passThrough

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

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, copy, deepEquals, deepHashCode, estimateRowCount, explain, explain, fieldIsNullable, getConvention, getCorrelVariable, getDigest, getExpectedInputRowType, getInput, getInputs, getRelDigest, getRelTypeName, getRowType, getTable, getVariablesSet, isEnforcer, isValid, metadata, onRegister, recomputeDigest, register, replaceInput, stripped

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

getCluster, getDescription, getId, getTraitSet

Constructor Details

EnumerableProject

public EnumerableProject(RelOptCluster cluster,
 RelTraitSet traitSet,
 RelNode input,
 List<? extends RexNode> projects,
 RelDataType rowType)

Creates an EnumerableProject.

Use create(org.apache.calcite.rel.RelNode, java.util.List<? extends org.apache.calcite.rex.RexNode>, org.apache.calcite.rel.type.RelDataType) unless you know what you're doing.

Parameters:

cluster - Cluster this relational expression belongs to

traitSet - Traits of this relational expression

input - Input relational expression

projects - List of expressions for the input columns

rowType - Output row type

EnumerableProject

@Deprecated
public EnumerableProject(RelOptCluster cluster,
 RelTraitSet traitSet,
 RelNode input,
 List<? extends RexNode> projects,
 RelDataType rowType,
 int flags)

Deprecated.

Method Details

create

public static EnumerableProject create(RelNode input,
 List<? extends RexNode> projects,
 RelDataType rowType)

Creates an EnumerableProject, specifying row type rather than field names.

copy

public EnumerableProject copy(RelTraitSet traitSet,
 RelNode input,
 List<RexNode> projects,
 RelDataType rowType)

Description copied from class: Project

Copies a project.

Specified by:

copy in class Project

Parameters:

traitSet - Traits

input - Input

projects - Project expressions

rowType - Output row type

Returns:

New Project if any parameter differs from the value of this Project, or just this if all the parameters are the same

See Also:

• Project.copy(RelTraitSet, List)

implement

public EnumerableRel.Result implement(EnumerableRelImplementor implementor,
 EnumerableRel.Prefer pref)

Description copied from interface: EnumerableRel

Creates a plan for this expression according to a calling convention.

Specified by:

implement in interface EnumerableRel

Parameters:

implementor - Implementor

pref - Preferred representation for rows in result expression

Returns:

Plan for this expression according to a calling convention

passThroughTraits

public @Nullable Pair<RelTraitSet,List<RelTraitSet>> passThroughTraits(RelTraitSet required)

Description copied from interface: PhysicalNode

Pass required traitset from parent node to child nodes, returns a pair of traits after traits is passed down.

Pair.left: the new traitset; Pair.right: the list of required traitsets for child nodes.

Specified by:

passThroughTraits in interface EnumerableRel

Specified by:

passThroughTraits in interface PhysicalNode

deriveTraits

public @Nullable Pair<RelTraitSet,List<RelTraitSet>> deriveTraits(RelTraitSet childTraits,
 int childId)

Description copied from interface: PhysicalNode

Derive traitset from child node, returns a pair of traits after traits derivation.

Pair.left: the new traitset; Pair.right: the list of required traitsets for child nodes.

Specified by:

deriveTraits in interface EnumerableRel

Specified by:

deriveTraits in interface PhysicalNode