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

Class RuleUtils

java.lang.Object

org.elasticsearch.xpack.esql.optimizer.rules.RuleUtils

public final class RuleUtils
extends Object

Method Summary

Modifier and Type	Method	Description
static org.elasticsearch.core.Tuple<List<Alias>,List<NamedExpression>>	aliasedNulls(List<Attribute> outputAttributes, Predicate<Attribute> shouldBeReplaced)
static AttributeMap<Expression>	foldableReferences(LogicalPlan plan, LogicalOptimizerContext ctx)	Collects references to foldables from the given logical plan, returning an AttributeMap that maps foldable aliases to their corresponding literal values.

Methods inherited from class java.lang.Object

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

Method Details

aliasedNulls

public static org.elasticsearch.core.Tuple<List<Alias>,List<NamedExpression>> aliasedNulls(List<Attribute> outputAttributes,
 Predicate<Attribute> shouldBeReplaced)

Parameters:

outputAttributes - The original output attributes.

shouldBeReplaced - A predicate to determine which attributes should be replaced with null aliases.

Returns:

a tuple of two lists:

1. A list of aliases to null literals for those data types in the outputAttributes that shouldBeReplaced.
2. A list of named expressions where attributes that match the predicate are replaced with their corresponding null alias.

foldableReferences

public static AttributeMap<Expression> foldableReferences(LogicalPlan plan,
 LogicalOptimizerContext ctx)

Collects references to foldables from the given logical plan, returning an AttributeMap that maps foldable aliases to their corresponding literal values.

Parameters:

plan - The logical plan to analyze.

ctx - The optimizer context providing fold context.

Returns:

An AttributeMap containing foldable references and their literal values.