Package org.elasticsearch.xpack.esql.expression.function.scalar.multivalue

Class MvMax

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.core.expression.function.scalar.ScalarFunction

org.elasticsearch.xpack.esql.expression.function.scalar.EsqlScalarFunction

org.elasticsearch.xpack.esql.expression.function.scalar.UnaryScalarFunction

org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.AbstractMultivalueFunction

org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.MvMax

All Implemented Interfaces:

NamedWriteable, Writeable, Resolvable, EvaluatorMapper, BlockLoaderExpression

public class MvMax
extends AbstractMultivalueFunction
implements BlockLoaderExpression

Reduce a multivalued field to a single valued field containing the maximum value.

Nested Class Summary

Nested classes/interfaces inherited from class org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.AbstractMultivalueFunction

AbstractMultivalueFunction.AbstractEvaluator, AbstractMultivalueFunction.AbstractNullableEvaluator

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

Expression.TypeResolution

Nested classes/interfaces inherited from interface org.elasticsearch.xpack.esql.expression.function.blockloader.BlockLoaderExpression

BlockLoaderExpression.PushedBlockLoaderExpression

Nested classes/interfaces inherited from interface org.elasticsearch.xpack.esql.evaluator.mapper.EvaluatorMapper

EvaluatorMapper.ToEvaluator

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.scalar.UnaryScalarFunction

field

Fields inherited from class org.elasticsearch.xpack.esql.core.expression.function.scalar.ScalarFunction

MAX_BYTES_REF_RESULT_SIZE

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

TO_STRING_MAX_WIDTH

Constructor Summary

Constructors

Constructor	Description
MvMax(Source source, Expression v)

Method Summary

Modifier and Type	Method	Description
protected EvalOperator.ExpressionEvaluator.Factory	evaluator(EvalOperator.ExpressionEvaluator.Factory fieldEval)	Build the evaluator given the evaluator a multivalued field.
String	getWriteableName()
protected NodeInfo<? extends Expression>	info()
Expression	replaceChildren(List<Expression> newChildren)
protected Expression.TypeResolution	resolveFieldType()
BlockLoaderExpression.PushedBlockLoaderExpression	tryPushToFieldLoading(SearchStats stats)	The field and loading configuration that replaces this expression, effectively "fusing" the expression into the load.

Methods inherited from class org.elasticsearch.xpack.esql.expression.function.scalar.multivalue.AbstractMultivalueFunction

resolveType, toEvaluator, writeTo

Methods inherited from class org.elasticsearch.xpack.esql.expression.function.scalar.UnaryScalarFunction

dataType, field, foldable

Methods inherited from class org.elasticsearch.xpack.esql.expression.function.scalar.EsqlScalarFunction

fold

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

arguments, equals, functionName, hashCode, nodeString, nullable

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

canonical, canonicalize, childrenResolved, 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

Methods inherited from interface org.elasticsearch.xpack.esql.evaluator.mapper.EvaluatorMapper

fold

Field Details

ENTRY

public static final NamedWriteableRegistry.Entry ENTRY

Constructor Details

MvMax

public MvMax(Source source,
 Expression v)

Method Details

getWriteableName

public String getWriteableName()

Specified by:

getWriteableName in interface NamedWriteable

resolveFieldType

protected Expression.TypeResolution resolveFieldType()

Specified by:

resolveFieldType in class AbstractMultivalueFunction

evaluator

protected EvalOperator.ExpressionEvaluator.Factory evaluator(EvalOperator.ExpressionEvaluator.Factory fieldEval)

Description copied from class: AbstractMultivalueFunction

Build the evaluator given the evaluator a multivalued field.

Specified by:

evaluator in class AbstractMultivalueFunction

replaceChildren

public Expression replaceChildren(List<Expression> newChildren)

Specified by:

replaceChildren in class Node<Expression>

info

protected NodeInfo<? extends Expression> info()

Specified by:

info in class Node<Expression>

tryPushToFieldLoading

public BlockLoaderExpression.PushedBlockLoaderExpression tryPushToFieldLoading(SearchStats stats)

Description copied from interface: BlockLoaderExpression

The field and loading configuration that replaces this expression, effectively "fusing" the expression into the load. Or null if the fusion isn't possible.

SearchStats.supportsLoaderConfig(org.elasticsearch.xpack.esql.core.expression.FieldAttribute.FieldName, org.elasticsearch.index.mapper.blockloader.BlockLoaderFunctionConfig, org.elasticsearch.index.mapper.MappedFieldType.FieldExtractPreference) checks that the configuration is supported by all field mappers. Callers to this method must call that to confirm that configurations returned are supported. Implementations of this method do not need to call it, though they may use methods like SearchStats.hasDocValues(org.elasticsearch.xpack.esql.core.expression.FieldAttribute.FieldName) and SearchStats.isIndexed(org.elasticsearch.xpack.esql.core.expression.FieldAttribute.FieldName) as preflight checks. They should use those methods if it is expensive to build the BlockLoaderFunctionConfig.

Specified by:

tryPushToFieldLoading in interface BlockLoaderExpression