Package org.apache.calcite.adapter.pig

Class PigProject

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.core.Project

org.apache.calcite.adapter.pig.PigProject

All Implemented Interfaces:

java.lang.Cloneable, PigRel, RelOptNode, RelNode

public class PigProject
extends Project
implements PigRel

Implementation of Project in Pig 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.pig.PigRel

PigRel.Implementor

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

Fields inherited from interface org.apache.calcite.adapter.pig.PigRel

CONVENTION

Constructor Summary

Constructors

Constructor	Description
PigProject(RelOptCluster cluster, RelTraitSet traitSet, RelNode input, java.util.List<? extends RexNode> projects, RelDataType rowType)	Creates a PigProject.

Method Summary

Modifier and Type	Method	Description
Project	copy(RelTraitSet traitSet, RelNode input, java.util.List<RexNode> projects, RelDataType rowType)	Copies a project.
RelOptTable	getTable()	Override this method so it looks down the tree to find the table this node is acting on.
void	implement(PigRel.Implementor implementor)	Converts this node to a Pig Latin statement.

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

accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, 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

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

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, computeSelfCost, copy, estimateRowCount, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, replaceInput

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

getCluster, getDescription, getDigest, getId, getTraitSet

Constructor Detail

PigProject

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

Creates a PigProject.

Method Detail

copy

public Project 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)

implement

public void implement(PigRel.Implementor implementor)

Description copied from interface: PigRel

Converts this node to a Pig Latin statement.

Specified by:

implement in interface PigRel

getTable

public RelOptTable getTable()

Override this method so it looks down the tree to find the table this node is acting on.

Specified by:

getTable in interface RelNode

Overrides:

getTable in class AbstractRelNode

Returns:

If this relational expression represents an access to a table, returns that table, otherwise returns null