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

Class ChangeCase

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.EsqlConfigurationFunction

org.elasticsearch.xpack.esql.expression.function.scalar.string.ChangeCase

All Implemented Interfaces:

NamedWriteable, Writeable, Resolvable, EvaluatorMapper, ConfigurationFunction

Direct Known Subclasses:

ToLower, ToUpper

public abstract class ChangeCase
extends EsqlConfigurationFunction

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static enum	ChangeCase.Case

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.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 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

Modifier	Constructor	Description
protected	ChangeCase(Source source, Expression field, Configuration configuration, ChangeCase.Case caseType)

Method Summary

Modifier and Type	Method	Description
ChangeCase.Case	caseType()
DataType	dataType()
Expression	field()
boolean	foldable()
abstract Expression	replaceChild(Expression child)
Expression	replaceChildren(List<Expression> newChildren)
protected Expression.TypeResolution	resolveType()
EvalOperator.ExpressionEvaluator.Factory	toEvaluator(EvaluatorMapper.ToEvaluator toEvaluator)	Convert this into an EvalOperator.ExpressionEvaluator.

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

configuration, equals, hashCode

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, functionName, 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, collectFirstChildren, collectLeaves, doCollectFirst, forEachDown, forEachDown, forEachDownMayReturnEarly, forEachProperty, forEachPropertyDown, forEachPropertyOnly, forEachPropertyUp, forEachUp, forEachUp, info, 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

Methods inherited from interface org.elasticsearch.common.io.stream.NamedWriteable

getWriteableName

Methods inherited from interface org.elasticsearch.common.io.stream.Writeable

writeTo

Constructor Details

ChangeCase

protected ChangeCase(Source source,
 Expression field,
 Configuration configuration,
 ChangeCase.Case caseType)

Method Details

dataType

public DataType dataType()

Specified by:

dataType in class Expression

resolveType

protected Expression.TypeResolution resolveType()

Overrides:

resolveType in class Expression

foldable

public boolean foldable()

Overrides:

foldable in class Expression

field

public Expression field()

caseType

public ChangeCase.Case caseType()

replaceChild

public abstract Expression replaceChild(Expression child)

replaceChildren

public Expression replaceChildren(List<Expression> newChildren)

Specified by:

replaceChildren in class Node<Expression>

toEvaluator

public EvalOperator.ExpressionEvaluator.Factory toEvaluator(EvaluatorMapper.ToEvaluator toEvaluator)

Description copied from interface: EvaluatorMapper

Convert this into an EvalOperator.ExpressionEvaluator.

Note for implementors: If you are implementing this function, you should call the passed-in lambda on your children, after doing any other manipulation (casting, etc.) necessary.

Note for Callers: If you are attempting to call this method, and you have an Expression and a Layout, you likely want to call EvalMapper.toEvaluator(org.elasticsearch.xpack.esql.core.expression.FoldContext, org.elasticsearch.xpack.esql.core.expression.Expression, org.elasticsearch.xpack.esql.planner.Layout) instead. On the other hand, if you already have something that looks like the parameter for this method, you should call this method with that function.

Build an EvalOperator.ExpressionEvaluator.Factory for the tree of expressions rooted at this node. This is only guaranteed to return a sensible evaluator if this node has a valid type. If this node is a subclass of Expression then "valid type" means that Expression.typeResolved() returns a non-error resolution. If Expression.typeResolved() returns an error then this method may throw. Or return an evaluator that produces garbage. Or return an evaluator that throws when run.