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java.lang.Objectorg.apache.directory.server.core.partition.impl.btree.DefaultOptimizer
Optimizer that annotates the filter using scan counts.
Constructor Summary | |
DefaultOptimizer(BTreePartition db)
Creates an optimizer on a database. |
Method Summary | |
void |
annotate(ExprNode node)
Annotates the expression tree to determine optimal evaluation order based on the scan count for indices that exist for each expression node. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait |
Constructor Detail |
public DefaultOptimizer(BTreePartition db)
db
- the database this optimizer works for.Method Detail |
public void annotate(ExprNode node) throws javax.naming.NamingException
annotate
in interface Optimizer
node
- the root of the expression node tree
javax.naming.NamingException
- if there are failures while optimizingOptimizer.annotate(ExprNode)
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