| Interface | Description |
|---|---|
| FedXCostModel |
Interface for a cost model used in
StatementGroupAndJoinOptimizer. |
| FedXOptimizer |
Interface for any FedX optimizer
|
| Class | Description |
|---|---|
| DefaultFedXCostModel |
Default implementation of the
FedXCostModel |
| ExclusiveTupleExprOptimizer |
A specialized optimizer which identifies and marks
ExclusiveTupleExpr. |
| FilterOptimizer |
Filter optimizer to push down FILTER expressions as far as possible.
|
| FilterOptimizer.FilterExprInsertVisitor | |
| FilterOptimizer.VarFinder | |
| GenericInfoOptimizer |
Generic 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)
|
| LimitOptimizer |
An optimizer that attempts to push upper limits into BGPs of the query.
|
| NaryJoinArgumentsComparator |
Comparator:
partial order: OwnedStatementSourcePatternGroup -> OwnedStatementSourcePattern -> StatementSourcePattern
|
| OptimizerUtil | |
| ServiceOptimizer |
Optimizer for SERVICE nodes.
|
| SourceSelection |
Perform source selection during optimization
|
| SourceSelection.ParallelCheckTask |
Task for sending an ASK request to the endpoints (for source selection)
|
| SourceSelection.SourceSelectionExecutorWithLatch | |
| StatementGroupAndJoinOptimizer |
Optimizer with the following tasks:
1.
|
| UnionOptimizer |
Optimizer to flatten the UNION operations.
|
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