Class RemoveNotOptimizer
- java.lang.Object
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- org.apache.iotdb.db.qp.strategy.optimizer.RemoveNotOptimizer
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- All Implemented Interfaces:
IFilterOptimizer
public class RemoveNotOptimizer extends java.lang.Object implements IFilterOptimizer
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Constructor Summary
Constructors Constructor Description RemoveNotOptimizer()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description FilterOperatoroptimize(FilterOperator filter)get DNF(disjunctive normal form) for this filter operator tree.
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Method Detail
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optimize
public FilterOperator optimize(FilterOperator filter) throws LogicalOperatorException
get DNF(disjunctive normal form) for this filter operator tree. Before getDNF, this op tree must be binary, in another word, each non-leaf node has exactly two children.- Specified by:
optimizein interfaceIFilterOptimizer- Returns:
- optimized operator
- Throws:
LogicalOperatorException- exception in RemoveNot optimizing
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