Package org.apache.calcite.plan

Class RelTraitPropagationVisitor

java.lang.Object

org.apache.calcite.rel.RelVisitor

org.apache.calcite.plan.RelTraitPropagationVisitor

public class RelTraitPropagationVisitor
extends RelVisitor

RelTraitPropagationVisitor traverses a RelNode and its unregistered children, making sure that each has a full complement of traits. When a RelNode is found to be missing one or more traits, they are copied from a RelTraitSet given during construction.

Field Summary

Fields

Modifier and Type	Field	Description
private RelTraitSet	baseTraits
private RelOptPlanner	planner

Constructor Summary

Constructors

Constructor	Description
RelTraitPropagationVisitor(RelOptPlanner planner, RelTraitSet baseTraits)

Method Summary

Modifier and Type	Method	Description
void	visit(RelNode rel, int ordinal, RelNode parent)	Visits a node during a traversal.

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

go, replaceRoot

Methods inherited from class java.lang.Object

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

Field Detail

baseTraits

private final RelTraitSet baseTraits

planner

private final RelOptPlanner planner

Constructor Detail

RelTraitPropagationVisitor

public RelTraitPropagationVisitor(RelOptPlanner planner,
                                  RelTraitSet baseTraits)

Method Detail

visit

public void visit(RelNode rel,
                  int ordinal,
                  RelNode parent)

Description copied from class: RelVisitor

Visits a node during a traversal.

Overrides:

visit in class RelVisitor

Parameters:

rel - Node to visit

ordinal - Ordinal of node within its parent

parent - Parent of the node, or null if it is the root of the traversal