hashjoinresultset.java

来自「derby database source code.good for you.」· Java 代码 · 共 67 行

/*

   Derby - Class org.apache.derby.impl.sql.execute.HashJoinResultSet

   Copyright 1999, 2004 The Apache Software Foundation or its licensors, as applicable.

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

      http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */

package org.apache.derby.impl.sql.execute;

import org.apache.derby.iapi.services.monitor.Monitor;

import org.apache.derby.iapi.services.sanity.SanityManager;

import org.apache.derby.iapi.services.stream.HeaderPrintWriter;
import org.apache.derby.iapi.services.stream.InfoStreams;

import org.apache.derby.iapi.error.StandardException;
import org.apache.derby.iapi.sql.Activation;
import org.apache.derby.iapi.sql.ResultSet;
import org.apache.derby.iapi.types.DataValueDescriptor;

import org.apache.derby.iapi.sql.execute.ExecutionContext;
import org.apache.derby.iapi.sql.execute.NoPutResultSet;

import org.apache.derby.iapi.services.loader.GeneratedMethod;


/**
 * Hash join of 2 arbitrary result sets.
 * Simple subclass of nested loop, differentiated
 * to ease RunTimeStatistics output generation.
 */
public class HashJoinResultSet extends NestedLoopJoinResultSet
{
    public HashJoinResultSet(NoPutResultSet leftResultSet,
								   int leftNumCols,
								   NoPutResultSet rightResultSet,
								   int rightNumCols,
								   Activation activation,
								   GeneratedMethod restriction,
								   int resultSetNumber,
								   boolean oneRowRightSide,
								   boolean notExistsRightSide,
								   double optimizerEstimatedRowCount,
								   double optimizerEstimatedCost,
								   GeneratedMethod closeCleanup)
    {
		super(leftResultSet, leftNumCols, rightResultSet, rightNumCols,
			  activation, restriction, resultSetNumber, 
			  oneRowRightSide, notExistsRightSide, optimizerEstimatedRowCount, 
			  optimizerEstimatedCost, closeCleanup);
    }
}