# Package org.eclipse.viatra.query.runtime.matchers.planning

- Interface Summary
  Interface | Description
  --- | ---
  IOperationCompiler<Collector> | An implicit common parameter is the "effort" PatternDescription.
  IQueryPlannerStrategy | An algorithm that builds a query plan based on a PSystem representation of a body of constraints.

- Class Summary
  Class | Description
  --- | ---
  SubPlan | A plan representing a subset of (or possibly all the) constraints evaluated.
  SubPlanFactory | Single entry point for creating subplans.

- Exception Summary
  Exception | Description
  --- | ---
  QueryProcessingException |