org.openanzo.glitter.query
Interface QueryExecutionPlan

All Known Subinterfaces:

CostBasedQueryExecutionPlan

All Known Implementing Classes:

GreedyCostBasedExecutionPlan, LexicalOrderBasedExecutionPlan, OdoQueryOptimizer, QueryOptimizer, SimpleCostExecutionPlan

public interface QueryExecutionPlan

A QueryExecutionPlan determines the order that bindings for sibling nodes in a SPARQL query.

Author:

lee

Method Summary

java.util.Iterator<TreeNode>

orderNodes(java.util.Iterator<? extends TreeNode> nodes) Provides an execution plan by ordering a sequence of sibling nodes.

Method Detail

orderNodes

java.util.Iterator<TreeNode> orderNodes(java.util.Iterator<? extends TreeNode> nodes)

Provides an execution plan by ordering a sequence of sibling nodes.

Parameters:

nodes - The original order of the nodes.

Returns:

An iterator over the nodes in the order in which bindings should be generated.