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

Interface Summary

Interface	Description
EvaluationStrategy	Evaluates TupleExprs and ValueExprs.
EvaluationStrategyFactory	Factory for EvaluationStrategys.
QueryContextInitializer	Callback for configuring/customising a QueryContext.
QueryEvaluationStep	A Step that may need to be executed in a EvaluationStrategy.
QueryOptimizer	Interface used by EvaluationStrategys to optimize the TupleExpr prior to evaluating the query.
QueryOptimizerPipeline	A pipeline of QueryOptimizers that, when executed in order on a TupleExpr, convert that TupleExpr to a more optimal query execution plan.
QueryPreparer	A generic interface for executing queries over a TripleSource.
QueryValueEvaluationStep	A step in the query evaluation that works on ValueExpresions.
RDFStarTripleSource
TripleSource	A triple source that can be queried for (the existence of) certain triples in certain contexts.

Class Summary

Class	Description
AbstractQueryPreparer
ArrayBindingSet	An array implementation of the BindingSet interface.
QueryBindingSet	An implementation of the BindingSet interface that is used to evalate query object models.
QueryContext	A QueryContext provides a means to pass arbitrary local state to a Function or TupleFunction.
QueryEvaluationStep.DelayedEvaluationIteration	Deprecated, for removal: This API element is subject to removal in a future version.
QueryValueEvaluationStep.ApplyFunctionForEachBinding	A minimal implementation that falls calls a function that should return a value per passed in bindingsets.
QueryValueEvaluationStep.ConstantQueryValueEvaluationStep	A QueryValueEvalationStep that will return the same constant value throughout the query execution.
QueryValueEvaluationStep.Fail	A minimal implementation that falls is known to throw an ValueExprEvaluationException.
QueryValueEvaluationStep.Minimal	A minimal implementation that falls back to calling evaluate in the strategy.

Exception Summary

Exception	Description
ValueExprEvaluationException	An exception indicating that a ValueExpr could not be evaluated due to illegal or incompatible values.