org.jboss.dna.graph.query.optimize
Interface OptimizerRule

All Known Implementing Classes:

AddAccessNodes, ChooseJoinAlgorithm, CopyCriteria, PushProjects, PushSelectCriteria, RaiseSelectCriteria, RemoveEmptyAccessNodes, ReplaceAliases, ReplaceViews, RewriteAsRangeCriteria, RewriteIdentityJoins, RightOuterToLeftOuterJoins

@Immutable
public interface OptimizerRule

Interface that defines an Optimizer rule.

Method Summary

PlanNode

execute(QueryContext context, PlanNode plan, LinkedList<OptimizerRule> ruleStack) Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.

Method Detail

execute

PlanNode execute(QueryContext context,
                 PlanNode plan,
                 LinkedList<OptimizerRule> ruleStack)

Optimize the supplied plan using the supplied context, hints, and yet-to-be-run rules.

Parameters:

context - the context in which the query is being optimized; never null

plan - the plan to be optimized; never null

ruleStack - the stack of rules that will be run after this rule; never null

Returns:

the optimized plan; never null