Package org.elasticsearch.xpack.esql.optimizer.rules.logical

Class ReplaceStatsFilteredAggWithEval

java.lang.Object

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

org.elasticsearch.xpack.esql.optimizer.rules.logical.OptimizerRules.OptimizerRule<LogicalPlan>

org.elasticsearch.xpack.esql.optimizer.rules.logical.ReplaceStatsFilteredAggWithEval

All Implemented Interfaces:

OptimizerRules.CoordinatorOnly, OptimizerRules.LocalAware<LogicalPlan>

public class ReplaceStatsFilteredAggWithEval
extends OptimizerRules.OptimizerRule<LogicalPlan>
implements OptimizerRules.CoordinatorOnly

Replaces an aggregation function having a false/null filter with an EVAL node.

     ... | STATS/INLINE STATS x = someAgg(y) WHERE FALSE {BY z} | ...
     =>
     ... | STATS/INLINE STATS x = someAgg(y) {BY z} > | EVAL x = NULL | KEEP x{, z} | ...
 

This rule is applied to both STATS' Aggregate and InlineJoin right-hand side Aggregate plans. The logic is common for both, but the handling of the InlineJoin is slightly different when it comes to pruning its right-hand side Aggregate. Skipped in local optimizer: once a fragment contains an Agg, this can no longer be pruned, which the rule can do

Field Summary

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

log

Constructor Summary

Constructors

Constructor	Description
ReplaceStatsFilteredAggWithEval()

Method Summary

Modifier and Type	Method	Description
protected LogicalPlan	rule(LogicalPlan plan)

Methods inherited from class org.elasticsearch.xpack.esql.optimizer.rules.logical.OptimizerRules.OptimizerRule

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

Methods inherited from interface org.elasticsearch.xpack.esql.optimizer.rules.logical.OptimizerRules.CoordinatorOnly

local

Constructor Details

ReplaceStatsFilteredAggWithEval

public ReplaceStatsFilteredAggWithEval()

Method Details

rule

protected LogicalPlan rule(LogicalPlan plan)

Specified by:

rule in class OptimizerRules.OptimizerRule<LogicalPlan>