| Package | Description | 
|---|---|
| org.eclipse.rdf4j.federated.optimizer | 
| Modifier and Type | Class and Description | 
|---|---|
| class  | ExclusiveTupleExprOptimizerA specialized optimizer which identifies and marks  ExclusiveTupleExpr. | 
| class  | FilterOptimizerFilter optimizer to push down FILTER expressions as far as possible. | 
| class  | GenericInfoOptimizerGeneric optimizer
 
 Tasks: - Collect information (hasUnion, hasFilter, hasService) - Collect all statements in a list (for source
 selection), do not collect SERVICE expressions - Collect all Join arguments and group them in the NJoin structure for
 easier optimization (flatten) | 
| class  | LimitOptimizerAn optimizer that attempts to push upper limits into BGPs of the query. | 
| class  | ServiceOptimizerOptimizer for SERVICE nodes. | 
| class  | StatementGroupAndJoinOptimizerOptimizer with the following tasks:
 
 1. | 
| class  | UnionOptimizerOptimizer to flatten the UNION operations. | 
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