Class ConstantOptimizer
- java.lang.Object
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- org.eclipse.rdf4j.query.algebra.evaluation.impl.ConstantOptimizer
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- All Implemented Interfaces:
QueryOptimizer
public class ConstantOptimizer extends Object implements QueryOptimizer
A query optimizer that optimizes constant value expressions.- Author:
- James Leigh, Arjohn Kampman
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Nested Class Summary
Nested Classes Modifier and Type Class Description protected class
ConstantOptimizer.ConstantVisitor
protected class
ConstantOptimizer.VarNameCollector
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Field Summary
Fields Modifier and Type Field Description protected static org.slf4j.Logger
logger
protected EvaluationStrategy
strategy
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Constructor Summary
Constructors Constructor Description ConstantOptimizer(EvaluationStrategy strategy)
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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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Field Detail
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logger
protected static final org.slf4j.Logger logger
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strategy
protected final EvaluationStrategy strategy
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Constructor Detail
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ConstantOptimizer
public ConstantOptimizer(EvaluationStrategy strategy)
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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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