org.apache.calcite.plan

Interface RelHintsPropagator

Functional Interface:

This is a functional interface and can therefore be used as the assignment target for a lambda expression or method reference.

@FunctionalInterface
public interface RelHintsPropagator

Customize the propagation of the RelHints from the root relational expression of a rule call RelOptRuleCall to the new equivalent expression.

See Also:

RelOptUtil.propagateRelHints(RelNode, RelNode)

Method Summary

Modifier and Type	Method and Description
RelNode	propagate(RelNode oriNode, RelNode equiv) Propagates the hints from a rule call's root relational expression oriNode to the new equivalent relational expression equiv.

Method Detail

propagate

RelNode propagate(RelNode oriNode,
                  RelNode equiv)

Propagates the hints from a rule call's root relational expression oriNode to the new equivalent relational expression equiv.

Parameters:

oriNode - Root relational expression of a rule call

equiv - Equivalent expression

Returns:

New relational expression that would register into the planner