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

Class ReplaceChangePointByExpressionWithEval

java.lang.Object

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

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

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

public final class ReplaceChangePointByExpressionWithEval
extends OptimizerRules.OptimizerRule<ChangePoint>

Extract non-attribute ChangePoint grouping expressions into a synthetic Eval.

For example, CHANGE_POINT v ON k BY LENGTH(label) becomes EVAL $$change_point_by_0 = LENGTH(label) | CHANGE_POINT v ON k BY $$change_point_by_0. PushDownEval in the operators batch takes care of pushing the Eval below any OrderBy if present.

Foldable groupings are pruned separately by PruneLiteralsInChangePointBy in the operators batch.

Field Summary

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

log

Constructor Summary

Constructors

Constructor	Description
ReplaceChangePointByExpressionWithEval()

Method Summary

Modifier and Type	Method	Description
protected LogicalPlan	rule(ChangePoint changePoint)

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

Constructor Details

ReplaceChangePointByExpressionWithEval

public ReplaceChangePointByExpressionWithEval()

Method Details

rule

protected LogicalPlan rule(ChangePoint changePoint)

Specified by:

rule in class OptimizerRules.OptimizerRule<ChangePoint>