Package org.elasticsearch.xpack.esql.plan.logical.promql.selector

Class InstantSelector

java.lang.Object

org.elasticsearch.xpack.esql.core.tree.Node<LogicalPlan>

org.elasticsearch.xpack.esql.plan.QueryPlan<LogicalPlan>

org.elasticsearch.xpack.esql.plan.logical.LogicalPlan

org.elasticsearch.xpack.esql.plan.logical.UnaryPlan

org.elasticsearch.xpack.esql.plan.logical.promql.selector.Selector

org.elasticsearch.xpack.esql.plan.logical.promql.selector.InstantSelector

All Implemented Interfaces:

NamedWriteable, Writeable, Resolvable

public class InstantSelector
extends Selector

Represents a PromQL instant vector selector. An instant vector selects time series based on metric name and label matchers, returning the most recent sample at the evaluation timestamp. This corresponds to PromQL syntax: metric_name{label="value"} offset 5m @ timestamp Examples: http_requests_total cpu_usage{host="web-1"} memory_used{env=~"prod.*"} offset 10m up{job="prometheus"} @ 1609746000 The instant vector selects a single sample per matching time series at the evaluation time (with optional offset/@ modifiers), representing the current state. Conceptually an instant selector is a range selector with a null range.

Nested Class Summary

Nested classes/interfaces inherited from class org.elasticsearch.xpack.esql.plan.logical.LogicalPlan

LogicalPlan.Stage

Nested classes/interfaces inherited from interface org.elasticsearch.common.io.stream.Writeable

Writeable.Reader<V>, Writeable.Writer<V>

Field Summary

Fields inherited from class org.elasticsearch.xpack.esql.plan.logical.promql.selector.Selector

output

Fields inherited from class org.elasticsearch.xpack.esql.core.tree.Node

TO_STRING_MAX_WIDTH

Constructor Summary

Constructors

Constructor	Description
InstantSelector(Source source, Expression series, List<Expression> labels, LabelMatchers labelMatchers, Evaluation evaluation)
InstantSelector(Source source, LogicalPlan child, Expression series, List<Expression> labels, LabelMatchers labelMatchers, Evaluation evaluation)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object o)
int	hashCode()
protected NodeInfo<InstantSelector>	info()
InstantSelector	replaceChild(LogicalPlan newChild)

Methods inherited from class org.elasticsearch.xpack.esql.plan.logical.promql.selector.Selector

evaluation, expressionsResolved, getWriteableName, labelMatchers, labels, series, writeTo

Methods inherited from class org.elasticsearch.xpack.esql.plan.logical.UnaryPlan

child, inputSet, output, outputSet, replaceChildren

Methods inherited from class org.elasticsearch.xpack.esql.plan.logical.LogicalPlan

analyzed, childrenResolved, optimized, preAnalyzed, preOptimized, resolved, setAnalyzed, setOptimized, setPreAnalyzed, setPreOptimized

Methods inherited from class org.elasticsearch.xpack.esql.plan.QueryPlan

computeExpressions, computeReferences, expressions, forEachExpression, forEachExpression, forEachExpressionDown, forEachExpressionUp, references, transformExpressionsDown, transformExpressionsDown, transformExpressionsOnly, transformExpressionsOnly, transformExpressionsOnlyUp, transformExpressionsUp, transformExpressionsUp

Methods inherited from class org.elasticsearch.xpack.esql.core.tree.Node

anyMatch, children, collect, collect, collect, collectFirstChildren, collectLeaves, doCollectFirst, forEachDown, forEachDown, forEachDownMayReturnEarly, forEachProperty, forEachPropertyDown, forEachPropertyOnly, forEachPropertyUp, forEachUp, forEachUp, nodeName, nodeProperties, nodeString, propertiesToString, replaceChildrenSameSize, source, sourceLocation, sourceText, toString, transformChildren, transformDown, transformDown, transformDown, transformNodeProps, transformPropertiesDown, transformPropertiesOnly, transformPropertiesUp, transformUp, transformUp, transformUp

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Details

InstantSelector

public InstantSelector(Source source,
 Expression series,
 List<Expression> labels,
 LabelMatchers labelMatchers,
 Evaluation evaluation)

InstantSelector

public InstantSelector(Source source,
 LogicalPlan child,
 Expression series,
 List<Expression> labels,
 LabelMatchers labelMatchers,
 Evaluation evaluation)

Method Details

info

protected NodeInfo<InstantSelector> info()

Specified by:

info in class Node<LogicalPlan>

replaceChild

public InstantSelector replaceChild(LogicalPlan newChild)

Specified by:

replaceChild in class UnaryPlan

equals

public boolean equals(Object o)

Overrides:

equals in class Selector

hashCode

public int hashCode()

Overrides:

hashCode in class Selector