Package org.elasticsearch.xpack.esql.inference

Class InferenceFunctionEvaluator

java.lang.Object

org.elasticsearch.xpack.esql.inference.InferenceFunctionEvaluator

public class InferenceFunctionEvaluator
extends Object

Evaluator for inference functions that performs constant folding by executing inference operations at optimization time and replacing them with their computed results.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	InferenceFunctionEvaluator.Factory	Factory for creating InferenceFunctionEvaluator instances.

Method Summary

Modifier and Type	Method	Description
static InferenceFunctionEvaluator.Factory	factory()
void	fold(InferenceFunction<?> f, ActionListener<Expression> listener)	Folds an inference function by executing it and replacing it with its computed result.

Methods inherited from class java.lang.Object

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

Method Details

factory

public static InferenceFunctionEvaluator.Factory factory()

fold

public void fold(InferenceFunction<?> f,
 ActionListener<Expression> listener)

Folds an inference function by executing it and replacing it with its computed result.

This method performs the following steps:

1. Validates that the function is foldable (has constant parameters)
2. Sets up a minimal execution context with appropriate circuit breakers
3. Creates and configures the appropriate inference operator
4. Executes the inference operation asynchronously
5. Converts the result to a Literal expression

Parameters:

f - the inference function to fold - must be foldable (have constant parameters)

listener - the listener to notify when folding completes successfully or fails