Package org.elasticsearch.xpack.esql.planner.premapper

Class PreMapper

java.lang.Object

org.elasticsearch.xpack.esql.planner.premapper.PreMapper

public class PreMapper
extends Object

The class is responsible for invoking any premapping steps that need to be applied to the logical plan, before this is being mapped to a physical one.

Constructor Summary

Constructors

Constructor	Description
PreMapper(TransportActionServices services)

Method Summary

Modifier and Type	Method	Description
void	preMapper(Versioned<LogicalPlan> plan, ActionListener<LogicalPlan> listener)	Invokes any premapping steps that need to be applied to the logical plan, before this is being mapped to a physical one.

Methods inherited from class java.lang.Object

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

Constructor Details

PreMapper

public PreMapper(TransportActionServices services)

Method Details

preMapper

public void preMapper(Versioned<LogicalPlan> plan,
 ActionListener<LogicalPlan> listener)

Invokes any premapping steps that need to be applied to the logical plan, before this is being mapped to a physical one.

The plan is passed as a Versioned so that the minimum transport version of the cluster is available here, even though the current query rewrites do not need it. Should the pre-mapper's query rewrites ever be refactored in a way that is not backwards compatible, the minimum version can be used to gate the new behavior. See Versioned for the broader rationale.