/*
Derby - Class org.apache.derby.impl.sql.execute.rts.RealNestedLoopLeftOuterJoinStatistics
Licensed to the Apache Software Foundation (ASF) under one or more
contributor license agreements. See the NOTICE file distributed with
this work for additional information regarding copyright ownership.
The ASF licenses this file to you 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.rts;
import org.apache.derby.catalog.UUID;
import org.apache.derby.impl.sql.catalog.XPLAINResultSetDescriptor;
import org.apache.derby.impl.sql.catalog.XPLAINResultSetTimingsDescriptor;
import org.apache.derby.impl.sql.execute.xplain.XPLAINUtil;
import org.apache.derby.iapi.services.io.StoredFormatIds;
import org.apache.derby.iapi.services.i18n.MessageService;
import org.apache.derby.iapi.reference.SQLState;
import org.apache.derby.iapi.services.io.FormatableHashtable;
import java.io.ObjectOutput;
import java.io.ObjectInput;
import java.io.IOException;
/**
ResultSetStatistics implemenation for NestedLoopLeftOuterJoinResultSet.
*/
public class RealNestedLoopLeftOuterJoinStatistics
extends RealNestedLoopJoinStatistics
{
/* Leave these fields public for object inspectors */
public int emptyRightRowsReturned;
// CONSTRUCTORS
/**
*
*
*/
public RealNestedLoopLeftOuterJoinStatistics(
int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
int rowsSeenLeft,
int rowsSeenRight,
int rowsReturned,
long restrictionTime,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost,
String userSuppliedOptimizerOverrides,
ResultSetStatistics leftResultSetStatistics,
ResultSetStatistics rightResultSetStatistics,
int emptyRightRowsReturned
)
{
super(
numOpens,
rowsSeen,
rowsFiltered,
constructorTime,
openTime,
nextTime,
closeTime,
resultSetNumber,
rowsSeenLeft,
rowsSeenRight,
rowsReturned,
restrictionTime,
false, // We never do an EXISTS join for an outer join
optimizerEstimatedRowCount,
optimizerEstimatedCost,
userSuppliedOptimizerOverrides,
leftResultSetStatistics,
rightResultSetStatistics
);
this.emptyRightRowsReturned = emptyRightRowsReturned;
}
// ResultSetStatistics methods
/**
* Return the statement execution plan as a String.
*
* @param depth Indentation level.
*
* @return String The statement execution plan as a String.
*/
public String getStatementExecutionPlanText(int depth)
{
initFormatInfo(depth);
return
indent + resultSetName + ":" + "\n" +
indent + MessageService.getTextMessage(SQLState.RTS_NUM_OPENS) +
" = " + numOpens + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_ROWS_SEEN_LEFT) +
" = " + rowsSeenLeft + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_ROWS_SEEN_RIGHT) +
" = " + rowsSeenRight + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_EMPTY_RIGHT_ROWS) +
" = " + emptyRightRowsReturned + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_ROWS_FILTERED) +
" = " + rowsFiltered + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_ROWS_RETURNED) +
" = " + rowsReturned + "\n" +
dumpTimeStats(indent, subIndent) + "\n" +
dumpEstimatedCosts(subIndent) + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_LEFT_RS) +
":\n" +
leftResultSetStatistics.getStatementExecutionPlanText(sourceDepth) +
"\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_RIGHT_RS) +
":\n" +
rightResultSetStatistics.getStatementExecutionPlanText(
sourceDepth) +
"\n";
}
/**
* Return information on the scan nodes from the statement execution
* plan as a String.
*
* @param depth Indentation level.
* @param tableName if not NULL then print information for this table only
*
* @return String The information on the scan nodes from the
* statement execution plan as a String.
*/
public String getScanStatisticsText(String tableName, int depth)
{
return leftResultSetStatistics.getScanStatisticsText(tableName, depth)
+ rightResultSetStatistics.getScanStatisticsText(tableName, depth);
}
// Class implementation
public String toString()
{
return getStatementExecutionPlanText(0);
}
protected void setNames()
{
nodeName = MessageService.getTextMessage(
SQLState.RTS_NESTED_LOOP_LEFT_OJ);
resultSetName = MessageService.getTextMessage(
SQLState.RTS_NESTED_LOOP_LEFT_OJ_RS);
}
public String getRSXplainType() { return XPLAINUtil.OP_JOIN_NL_LO; }
public String getRSXplainDetails()
{
String op_details = "("+this.resultSetNumber + "), " +
this.resultSetName;
// check to see if this NL Join is part of an Exist clause
if (this.oneRowRightSide) op_details+= ", EXISTS JOIN";
return op_details;
}
public Object getResultSetDescriptor(Object rsID, Object parentID,
Object scanID, Object sortID, Object stmtID, Object timingID)
{
return new XPLAINResultSetDescriptor(
(UUID)rsID,
getRSXplainType(),
getRSXplainDetails(),
new Integer(this.numOpens),
null, // index updates
null, // lock mode
null, // lock granularity
(UUID)parentID,
new Double(this.optimizerEstimatedRowCount),
new Double(this.optimizerEstimatedCost),
null, // affected rows
null, // deferred rows
null, // the input rows
new Integer(this.rowsSeenLeft),
new Integer(this.rowsSeenRight),
new Integer(this.rowsFiltered),
new Integer(this.rowsReturned),
new Integer(this.emptyRightRowsReturned),
null, // index key optimization
(UUID)scanID,
(UUID)sortID,
(UUID)stmtID,
(UUID)timingID);
}
}