Interface FedXCostModel
- All Known Implementing Classes:
DefaultFedXCostModel
public interface FedXCostModel
Interface for a cost model used in
StatementGroupAndJoinOptimizer.- Author:
- Andreas Schwarte
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Method Summary
Modifier and TypeMethodDescriptiondoubleestimateCost(TupleExpr tupleExpr, Set<String> joinVars) Return the estimated cost for the givenTupleExpr
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Method Details
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estimateCost
Return the estimated cost for the givenTupleExpr- Parameters:
tupleExpr-joinVars-- Returns:
- the cost associated to the tupleExpr
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