Package org.eclipse.rdf4j.query.algebra.evaluation

Interface QueryValueEvaluationStep

All Known Implementing Classes:
QueryValueEvaluationStep.ConstantQueryValueEvaluationStep, QueryValueEvaluationStep.Minimal
public interface QueryValueEvaluationStep
A step in the query evaluation that works on ValueExpresions.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static class 
    QueryValueEvaluationStep.ConstantQueryValueEvaluationStep
    A QueryValueEvalationStep that will return the same constant value throughout the query execution.
    static class 
    QueryValueEvaluationStep.Minimal
    A minimal implementation that falls back to calling evaluate in the strategy.

  • Method Summary

    Modifier and Type
    Method
    Description
    Value
    evaluate​(BindingSet bindings)
     
    default boolean
    isConstant()
    If an value expression results in a constant then it may be executed once per query invocation.