Class SameTermFilterOptimizer
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.evaluation.optimizer.SameTermFilterOptimizer
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- All Implemented Interfaces:
QueryOptimizer
public class SameTermFilterOptimizer extends Object implements QueryOptimizer
A query optimizer that embedsFilter
s withSameTerm
operators in statement patterns as much as possible. Operators like sameTerm(X, Y) are processed by renaming X to Y (or vice versa). Operators like sameTerm(X,) are processed by assigning the URI to all occurring variables with name X. - Author:
- Arjohn Kampman, James Leigh
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Constructor Summary
Constructors Constructor Description SameTermFilterOptimizer()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description void
optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)
Applies generally applicable optimizations to the supplied query: variable assignments are inlined.
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Method Detail
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optimize
public void optimize(TupleExpr tupleExpr, Dataset dataset, BindingSet bindings)
Applies generally applicable optimizations to the supplied query: variable assignments are inlined.- Specified by:
optimize
in interfaceQueryOptimizer
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