FedXCostModel (Eclipse RDF4J 4.3.2)

All Known Implementing Classes:

DefaultFedXCostModel
```
public interface FedXCostModel
```
Interface for a cost model used in StatementGroupAndJoinOptimizer.

Author:

Andreas Schwarte

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double`	`estimateCost(TupleExpr tupleExpr, Set<String> joinVars)`	Return the estimated cost for the given `TupleExpr`

- Method Detail
  - estimateCost
```
double estimateCost(TupleExpr tupleExpr,
                    Set<String> joinVars)
```
    Return the estimated cost for the given TupleExpr
    
    Parameters:
    
    tupleExpr -
    
    joinVars -
    
    Returns:
    
    the cost associated to the tupleExpr