/*
Derby - Class org.apache.derby.impl.sql.execute.rts.RealTableScanStatistics
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.iapi.services.io.StoredFormatIds;
import org.apache.derby.iapi.util.PropertyUtil;
import org.apache.derby.iapi.util.StringUtil;
import org.apache.derby.iapi.services.i18n.MessageService;
import org.apache.derby.iapi.reference.SQLState;
import org.apache.derby.iapi.services.io.FormatableHashtable;
import org.apache.derby.iapi.services.io.FormatableProperties;
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.catalog.XPLAINScanPropsDescriptor;
import org.apache.derby.impl.sql.execute.xplain.XPLAINUtil;
import org.apache.derby.iapi.sql.execute.xplain.XPLAINVisitor;
import java.io.ObjectOutput;
import java.io.ObjectInput;
import java.io.IOException;
import java.util.Enumeration;
import java.util.Properties;
/**
ResultSetStatistics implemenation for TableScanResultSet.
*/
public class RealTableScanStatistics
extends RealNoPutResultSetStatistics
{
/* Leave these fields public for object inspectors */
public boolean isConstraint;
public boolean coarserLock;
public int fetchSize;
public String isolationLevel;
public String tableName;
public String userSuppliedOptimizerOverrides;
public String indexName;
public String lockString;
public String qualifiers;
public String startPosition;
public String stopPosition;
public FormatableProperties scanProperties;
// CONSTRUCTORS
/**
*
*
*/
public RealTableScanStatistics(int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
String tableName,
String userSuppliedOptimizerOverrides,
String indexName,
boolean isConstraint,
String qualifiers,
Properties scanProperties,
String startPosition,
String stopPosition,
String isolationLevel,
String lockString,
int fetchSize,
boolean coarserLock,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost
)
{
super(
numOpens,
rowsSeen,
rowsFiltered,
constructorTime,
openTime,
nextTime,
closeTime,
resultSetNumber,
optimizerEstimatedRowCount,
optimizerEstimatedCost
);
this.tableName = tableName;
this.userSuppliedOptimizerOverrides = userSuppliedOptimizerOverrides;
this.indexName = indexName;
this.isConstraint = isConstraint;
this.qualifiers = qualifiers;
this.scanProperties = new FormatableProperties();
for (Enumeration e = scanProperties.keys(); e.hasMoreElements(); )
{
String key = (String)e.nextElement();
this.scanProperties.put(key, scanProperties.get(key));
}
this.startPosition = startPosition;
this.stopPosition = stopPosition;
this.isolationLevel = isolationLevel;
this.lockString = lockString;
this.fetchSize = fetchSize;
this.coarserLock = coarserLock;
}
// ResultSetStatistics methods
/**
* Return the statement execution plan as a String.
*
* @param depth Indentation level
*
* @return String The statement executio plan as a String.
*/
public String getStatementExecutionPlanText(int depth)
{
String header = "";
String isolationString = null;
initFormatInfo(depth);
if (userSuppliedOptimizerOverrides != null)
{
header =
indent + MessageService.getTextMessage(SQLState.RTS_USER_SUPPLIED_OPTIMIZER_OVERRIDES_FOR_TABLE,
tableName, userSuppliedOptimizerOverrides);
header = header + "\n";
}
if (indexName != null)
{
// note that the "constraint" and "index" literals are names of SQL
// objects and so do not need to be internationalized
header = header +
indent + MessageService.getTextMessage(
SQLState.RTS_IS_RS_USING,
tableName,
isConstraint ? "constraint" : "index",
indexName);
}
else
{
header = header +
indent + MessageService.getTextMessage(
SQLState.RTS_TS_RS_FOR,
tableName);
}
header = header + " " + MessageService.getTextMessage(
SQLState.RTS_LOCKING_OPTIMIZER,
isolationLevel,
lockString);
/* Did we get (or already have) a coarser lock then requested
* due to a covering lock, lock escalation or configuration
* for table locking.
*/
if (coarserLock)
{
header = header + " (" + MessageService.getTextMessage(
SQLState.RTS_ACTUAL_TABLE) +
")";
}
header = header + "\n";
String scanInfo =
indent + MessageService.getTextMessage(SQLState.RTS_SCAN_INFO) +
":\n" +
PropertyUtil.sortProperties(scanProperties, subIndent);
return
header +
indent + MessageService.getTextMessage(SQLState.RTS_NUM_OPENS) +
" = " + numOpens + "\n" +
indent + MessageService.getTextMessage(SQLState.RTS_ROWS_SEEN) +
" = " + rowsSeen + "\n" +
indent + MessageService.getTextMessage(
SQLState.RTS_ROWS_FILTERED) +
" = " + rowsFiltered + "\n" +
indent + MessageService.getTextMessage(SQLState.RTS_FETCH_SIZE) +
" = " + fetchSize + "\n" +
dumpTimeStats(indent, subIndent) + "\n" +
((rowsSeen > 0)
?
subIndent + MessageService.getTextMessage(
SQLState.RTS_NEXT_TIME) +
" = " + (nextTime / rowsSeen) + "\n"
:
"") + "\n" +
scanInfo +
subIndent + MessageService.getTextMessage(
SQLState.RTS_START_POSITION) +
":\n" + StringUtil.ensureIndent(startPosition, depth + 2) + "\n" +
subIndent + MessageService.getTextMessage(
SQLState.RTS_STOP_POSITION) +
":\n" + StringUtil.ensureIndent(stopPosition, depth + 2) + "\n" +
subIndent + MessageService.getTextMessage(SQLState.RTS_QUALS) +
":\n" + StringUtil.ensureIndent(qualifiers, depth + 2) + "\n" +
// RESOLVE - estimated row count and cost will eventually
// be displayed for all nodes
dumpEstimatedCosts(subIndent);
}
/**
* 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)
{
if ((tableName == null) || (tableName.equals(this.tableName)))
return getStatementExecutionPlanText(depth);
else
return "";
}
// Class implementation
public String toString()
{
return getStatementExecutionPlanText(0);
}
/**
* Format for display, a name for this node.
*
*/
public String getNodeName(){
return MessageService.getTextMessage(
indexName == null ?
SQLState.RTS_TABLE_SCAN :
SQLState.RTS_INDEX_SCAN);
}
/**
* If this node is on a database item (like a table or an index), then provide a
* string that describes the on item.
*
*/
public String getNodeOn(){
if (indexName == null)
return MessageService.getTextMessage(SQLState.RTS_ON, tableName);
else
return MessageService.getTextMessage(SQLState.RTS_ON_USING,
tableName,
indexName);
}
// -----------------------------------------------------
// XPLAINable Implementation
// -----------------------------------------------------
public void accept(XPLAINVisitor visitor) {
// I have no children
visitor.setNumberOfChildren(0);
// pre-order, depth-first traversal
// me first
visitor.visit(this);
// I'm a leaf node, I have no children ...
}
public String getRSXplainType()
{
if (this.indexName!=null)
return this.isConstraint ? XPLAINUtil.OP_CONSTRAINTSCAN :
XPLAINUtil.OP_INDEXSCAN;
else
return XPLAINUtil.OP_TABLESCAN;
}
public String getRSXplainDetails()
{
if (this.indexName!=null)
return (this.isConstraint ? "C: " : "I: ") + this.indexName;
else
return "T: " + this.tableName;
}
public Object getScanPropsDescriptor(Object scanPropsID)
{
String scanObjectType, scanObjectName;
if (this.indexName!=null)
{
if (this.isConstraint)
{
scanObjectType = "C"; // constraint
scanObjectName = this.indexName;
}
else
{
scanObjectType = "I"; // index
scanObjectName = this.indexName;
}
}
else
{
scanObjectType = "T"; // table
scanObjectName = this.tableName;
}
String isoLevel = XPLAINUtil.getIsolationLevelCode(this.isolationLevel);
XPLAINScanPropsDescriptor scanRSDescriptor =
new XPLAINScanPropsDescriptor(
(UUID)scanPropsID,
scanObjectName,
scanObjectType,
null, // the scan type: heap, btree, sort
isoLevel, // the isolation level
null, // the number of visited pages
null, // the number of visited rows
null, // the number of qualified rows
null, // the number of visited deleted rows
null, // the number of fetched columns
null, // the bitset of fetched columns
null, // the btree height
new Integer(this.fetchSize),
this.startPosition,
this.stopPosition,
this.qualifiers,
null, // the next qualifiers
null, // the hash key column numbers
null // the hash table size
);
FormatableProperties props = this.scanProperties;
return XPLAINUtil.extractScanProps(scanRSDescriptor,props);
}
public Object getResultSetDescriptor(Object rsID, Object parentID,
Object scanID, Object sortID, Object stmtID, Object timingID)
{
String lockMode = XPLAINUtil.getLockModeCode(this.lockString);
String lockGran = XPLAINUtil.getLockGranularityCode(this.lockString);
return new XPLAINResultSetDescriptor(
(UUID)rsID,
getRSXplainType(),
getRSXplainDetails(),
new Integer(this.numOpens),
null, // the number of index updates
lockMode, // lock mode
lockGran, // lock granularity
(UUID)parentID,
new Double(this.optimizerEstimatedRowCount),
new Double(this.optimizerEstimatedCost),
null, // the affected rows
null, // the deferred rows
null, // the input rows
new Integer(this.rowsSeen), // the seen rows
null, // the seen rows right
new Integer(this.rowsFiltered), // the filtered rows
new Integer(this.rowsSeen-this.rowsFiltered),// the returned rows
null, // the empty right rows
null, // index key optimization
(UUID)scanID,
(UUID)sortID,
(UUID)stmtID, // the stmt UUID
(UUID)timingID);
}
}
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