Package org.elasticsearch.xpack.esql.expression.function.aggregate

Class MaxOverTime

java.lang.Object

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

org.elasticsearch.xpack.esql.core.expression.Expression

org.elasticsearch.xpack.esql.core.expression.function.Function

org.elasticsearch.xpack.esql.expression.function.aggregate.AggregateFunction

org.elasticsearch.xpack.esql.expression.function.aggregate.TimeSeriesAggregateFunction

org.elasticsearch.xpack.esql.expression.function.aggregate.MaxOverTime

All Implemented Interfaces:

NamedWriteable, Writeable, PostAnalysisPlanVerificationAware, Resolvable, OptionalArgument

public class MaxOverTime
extends TimeSeriesAggregateFunction
implements OptionalArgument

Similar to Max, but it is used to calculate the maximum value over a time series of values from the given field.

Nested Class Summary

Nested classes/interfaces inherited from class org.elasticsearch.xpack.esql.core.expression.Expression

Expression.TypeResolution

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

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

Field Summary

Fields

Modifier and Type	Field	Description
static final NamedWriteableRegistry.Entry	ENTRY

Fields inherited from class org.elasticsearch.xpack.esql.expression.function.aggregate.AggregateFunction

NO_WINDOW, WINDOW_INTERVAL

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

TO_STRING_MAX_WIDTH

Constructor Summary

Constructors

Constructor	Description
MaxOverTime(Source source, Expression field, Expression window)
MaxOverTime(Source source, Expression field, Expression filter, Expression window)

Method Summary

Modifier and Type	Method	Description
DataType	dataType()
String	getWriteableName()
protected NodeInfo<MaxOverTime>	info()
Max	perTimeSeriesAggregation()	Returns the aggregation function to be used in the first aggregation stage, which is grouped by `_tsid` (and `time_bucket`).
MaxOverTime	replaceChildren(List<Expression> newChildren)
protected Expression.TypeResolution	resolveType()
MaxOverTime	withFilter(Expression filter)	Attach a filter to the aggregate function.

Methods inherited from class org.elasticsearch.xpack.esql.expression.function.aggregate.TimeSeriesAggregateFunction

aggregateInputReferences, requiredTimeSeriesSource

Methods inherited from class org.elasticsearch.xpack.esql.expression.function.aggregate.AggregateFunction

equals, field, filter, hasFilter, hashCode, hasWindow, parameters, postAnalysisPlanVerification, readWindow, window, withParameters, writeTo

Methods inherited from class org.elasticsearch.xpack.esql.core.expression.function.Function

arguments, functionName, nodeString, nullable

Methods inherited from class org.elasticsearch.xpack.esql.core.expression.Expression

canonical, canonicalize, childrenResolved, fold, foldable, propertiesToString, references, resolved, semanticEquals, semanticHash, toString, typeResolved

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, replaceChildrenSameSize, source, sourceLocation, sourceText, 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

Field Details

ENTRY

public static final NamedWriteableRegistry.Entry ENTRY

Constructor Details

MaxOverTime

public MaxOverTime(Source source,
 Expression field,
 Expression window)

MaxOverTime

public MaxOverTime(Source source,
 Expression field,
 Expression filter,
 Expression window)

Method Details

getWriteableName

public String getWriteableName()

Specified by:

getWriteableName in interface NamedWriteable

withFilter

public MaxOverTime withFilter(Expression filter)

Description copied from class: AggregateFunction

Attach a filter to the aggregate function.

Specified by:

withFilter in class AggregateFunction

info

protected NodeInfo<MaxOverTime> info()

Specified by:

info in class Node<Expression>

replaceChildren

public MaxOverTime replaceChildren(List<Expression> newChildren)

Specified by:

replaceChildren in class Node<Expression>

resolveType

protected Expression.TypeResolution resolveType()

Overrides:

resolveType in class AggregateFunction

dataType

public DataType dataType()

Specified by:

dataType in class Expression

perTimeSeriesAggregation

public Max perTimeSeriesAggregation()

Description copied from class: TimeSeriesAggregateFunction

Returns the aggregation function to be used in the first aggregation stage, which is grouped by `_tsid` (and `time_bucket`).

Specified by:

perTimeSeriesAggregation in class TimeSeriesAggregateFunction

See Also:

• TranslateTimeSeriesAggregate