com.metamatrix.query.optimizer.relational.rules
Class RuleRemoveOptionalJoins
java.lang.Object
com.metamatrix.query.optimizer.relational.rules.RuleRemoveOptionalJoins
- All Implemented Interfaces:
- OptimizerRule
public class RuleRemoveOptionalJoins
- extends java.lang.Object
- implements OptimizerRule
Removes optional join nodes if elements originating from that join are not used in the
top level project symbols.
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
RuleRemoveOptionalJoins
public RuleRemoveOptionalJoins()
execute
public PlanNode execute(PlanNode plan,
QueryMetadataInterface metadata,
CapabilitiesFinder capFinder,
RuleStack rules,
AnalysisRecord analysisRecord,
CommandContext context)
throws QueryPlannerException,
QueryMetadataException,
MetaMatrixComponentException
- Specified by:
execute
in interface OptimizerRule
- Throws:
QueryPlannerException
QueryMetadataException
MetaMatrixComponentException
toString
public java.lang.String toString()
- Overrides:
toString
in class java.lang.Object
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