Package org.elasticsearch.xpack.esql.planner

Class ExplainPlanTransformer

java.lang.Object

org.elasticsearch.xpack.esql.planner.ExplainPlanTransformer

public final class ExplainPlanTransformer
extends Object

Transforms a physical plan for EXPLAIN mode by replacing data source nodes with empty local sources. This makes execution essentially free while preserving the plan structure for profiling.

Method Summary

Modifier and Type	Method	Description
static PhysicalPlan	replaceDataSourcesWithEmpty(PhysicalPlan plan)	Transforms the plan by replacing data source nodes with empty LocalSourceExec.

Methods inherited from class java.lang.Object

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

Method Details

replaceDataSourcesWithEmpty

public static PhysicalPlan replaceDataSourcesWithEmpty(PhysicalPlan plan)

Transforms the plan by replacing data source nodes with empty LocalSourceExec. This preserves the plan structure but makes execution cheap since no data is read. Handles both ES data sources and external data sources (Iceberg, Parquet, S3, etc.).

Parameters:

plan - the original physical plan

Returns:

a transformed plan with empty data sources