org.openanzo.glitter.query
Interface NodeCostModel

All Known Implementing Classes:

SimpleCostModel

public interface NodeCostModel

A NodeCostModel can assign a query-execution cost to any TreeNode in a SPARQL query

Author:

lee

Method Summary

double

computeCost(TreeNode node)

Method Detail

computeCost

double computeCost(TreeNode node)

Parameters:

node - A node in the SPARQL query

Returns:

The cost (an arbitrary numeric) of generating bindings for the given node