Package org.apache.calcite.rel.logical

Class LogicalProject

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Project

org.apache.calcite.rel.logical.LogicalProject

All Implemented Interfaces:

java.lang.Cloneable, RelOptNode, RelNode

public final class LogicalProject
extends Project

Sub-class of Project not targeted at any particular engine or 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.rel.RelNode

RelNode.Context

Field Summary

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

exps

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
LogicalProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType)	Creates a LogicalProject.
LogicalProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType, int flags)	Deprecated.
LogicalProject(RelOptCluster cluster, RelNode input, java.util.List<RexNode> projects, java.util.List<java.lang.String> fieldNames, int flags)	Deprecated.
LogicalProject(RelInput input)	Creates a LogicalProject by parsing serialized output.

Method Summary

Modifier and Type	Method	Description
RelNode	accept(RelShuttle shuttle)	Accepts a visit from a shuttle.
LogicalProject	copy(RelTraitSet traitSet, RelNode input, java.util.List<RexNode> projects, RelDataType rowType)	Copies a project.
static LogicalProject	create(RelNode input, java.util.List<? extends RexNode> projects, java.util.List<java.lang.String> fieldNames)	Creates a LogicalProject.
static LogicalProject	create(RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType)	Creates a LogicalProject, specifying row type rather than field names.

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

accept, computeSelfCost, copy, copy, explainTerms, getChildExps, getFlags, getMapping, getMapping, getNamedProjects, getPartialMapping, getPermutation, getPermutation, getProjects, 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

collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, metadata, onRegister, recomputeDigest, register, sole, toString

Methods inherited from class java.lang.Object

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

Constructor Detail

LogicalProject

public LogicalProject(RelOptCluster cluster,
                      RelTraitSet traitSet,
                      RelNode input,
                      java.util.List<? extends RexNode> projects,
                      RelDataType rowType)

Creates a LogicalProject.

Use create(org.apache.calcite.rel.RelNode, java.util.List<? extends org.apache.calcite.rex.RexNode>, java.util.List<java.lang.String>) 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

LogicalProject

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

Deprecated.

LogicalProject

@Deprecated
public LogicalProject(RelOptCluster cluster,
                      RelNode input,
                      java.util.List<RexNode> projects,
                      java.util.List<java.lang.String> fieldNames,
                      int flags)

Deprecated.

LogicalProject

public LogicalProject(RelInput input)

Creates a LogicalProject by parsing serialized output.

Method Detail

create

public static LogicalProject create(RelNode input,
                                    java.util.List<? extends RexNode> projects,
                                    java.util.List<java.lang.String> fieldNames)

Creates a LogicalProject.

create

public static LogicalProject create(RelNode input,
                                    java.util.List<? extends RexNode> projects,
                                    RelDataType rowType)

Creates a LogicalProject, specifying row type rather than field names.

copy

public LogicalProject copy(RelTraitSet traitSet,
                           RelNode input,
                           java.util.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)

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