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

Class PromqlFunctionRegistry

java.lang.Object

org.elasticsearch.xpack.esql.expression.promql.function.PromqlFunctionRegistry

public class PromqlFunctionRegistry
extends Object

A registry for PromQL functions that maps function names to their respective definitions.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static final record	PromqlFunctionRegistry.PromqlContext	Carries the PromQL evaluation context needed by function builders to construct ES|QL expressions.

Field Summary

Fields

Modifier and Type	Field	Description
static final PromqlFunctionRegistry	INSTANCE

Method Summary

Modifier and Type	Method	Description
Collection<PromqlFunctionDefinition>	allFunctions()
Expression	buildEsqlFunction(String name, Source source, Expression target, PromqlFunctionRegistry.PromqlContext ctx, List<Expression> extraParams)
void	checkFunction(Source source, String name)
PromqlFunctionDefinition	functionMetadata(String name)	Retrieves the function definition metadata for the given function name.
boolean	isNotImplemented(String name)	Returns true if the function with the given name exists in the registry but has not yet been implemented.
SortedSet<String>	notImplementedFunctions()	Returns the names of PromQL functions that are recognized but not yet implemented, sorted for deterministic output.

Methods inherited from class java.lang.Object

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

Field Details

INSTANCE

public static final PromqlFunctionRegistry INSTANCE

Method Details

allFunctions

public Collection<PromqlFunctionDefinition> allFunctions()

functionMetadata

public PromqlFunctionDefinition functionMetadata(String name)

Retrieves the function definition metadata for the given function name.

isNotImplemented

public boolean isNotImplemented(String name)

Returns true if the function with the given name exists in the registry but has not yet been implemented.

notImplementedFunctions

public SortedSet<String> notImplementedFunctions()

Returns the names of PromQL functions that are recognized but not yet implemented, sorted for deterministic output. Used by documentation generation to render the "Not yet supported" list straight from the registry.

checkFunction

public void checkFunction(Source source,
 String name)

buildEsqlFunction

public Expression buildEsqlFunction(String name,
 Source source,
 Expression target,
 PromqlFunctionRegistry.PromqlContext ctx,
 List<Expression> extraParams)