Package org.elasticsearch.xpack.esql.optimizer.rules.physical.local

Class ExtractDimensionFieldsAfterAggregation

java.lang.Object

org.elasticsearch.xpack.esql.rule.Rule<PhysicalPlan,PhysicalPlan>

org.elasticsearch.xpack.esql.rule.ParameterizedRule<PhysicalPlan,PhysicalPlan,LocalPhysicalOptimizerContext>

org.elasticsearch.xpack.esql.optimizer.PhysicalOptimizerRules.ParameterizedOptimizerRule<PhysicalPlan,LocalPhysicalOptimizerContext>

org.elasticsearch.xpack.esql.optimizer.rules.physical.local.ExtractDimensionFieldsAfterAggregation

public final class ExtractDimensionFieldsAfterAggregation
extends PhysicalOptimizerRules.ParameterizedOptimizerRule<PhysicalPlan,LocalPhysicalOptimizerContext>

A rule that moves `VALUES(dimension-field)` aggregations in time-series aggregations to execute after the aggregation, reading the dimension fields once each group. This is possible because dimension field values for `_tsid` are identical across all documents in the same time-series. For example: `TS .. | STATS sum(rate(r1)), sum(rate(r2)) BY cluster, host, tbucket(1m)` without this rule `TS .. | EXTRACT_FIELDS(r1,r2,cluster, host) | STATS rate(r1), rate(r2), VALUES(cluster), VALUES(host) BY _tsid, tbucket(1m)` with this rule `TS .. | EXTRACT_FIELDS(r1,r2) | STATS rate(r1), rate(r2), FIRST_DOC_ID(_doc) BY _tsid, tbucket(1m) | EXTRACT_FIELDS(cluster, host) | ...

Field Summary

Fields inherited from class org.elasticsearch.xpack.esql.rule.Rule

log

Constructor Summary

Constructors

Constructor	Description
ExtractDimensionFieldsAfterAggregation()

Method Summary

Modifier and Type	Method	Description
PhysicalPlan	rule(PhysicalPlan plan, LocalPhysicalOptimizerContext context)

Methods inherited from class org.elasticsearch.xpack.esql.optimizer.PhysicalOptimizerRules.ParameterizedOptimizerRule

apply

Methods inherited from class org.elasticsearch.xpack.esql.rule.ParameterizedRule

apply

Methods inherited from class org.elasticsearch.xpack.esql.rule.Rule

name, toString, typeToken

Methods inherited from class java.lang.Object

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

Constructor Details

ExtractDimensionFieldsAfterAggregation

public ExtractDimensionFieldsAfterAggregation()

Method Details

rule

public PhysicalPlan rule(PhysicalPlan plan,
 LocalPhysicalOptimizerContext context)

Specified by:

rule in class PhysicalOptimizerRules.ParameterizedOptimizerRule<PhysicalPlan,LocalPhysicalOptimizerContext>