org.apache.derby.impl.sql.execute.rts
Class RealDistinctScanStatistics
java.lang.Object
org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics
org.apache.derby.impl.sql.execute.rts.RealNoPutResultSetStatistics
org.apache.derby.impl.sql.execute.rts.RealHashScanStatistics
org.apache.derby.impl.sql.execute.rts.RealDistinctScanStatistics
- All Implemented Interfaces:
- XPLAINable, ResultSetStatistics
public class RealDistinctScanStatistics
- extends RealHashScanStatistics
ResultSetStatistics implemenation for DistinctScanResultSet.
Fields inherited from class org.apache.derby.impl.sql.execute.rts.RealHashScanStatistics |
hashKeyColumns, hashtableSize, indexName, isConstraint, isolationLevel, lockString, nextQualifiers, scanProperties, scanQualifiers, startPosition, stopPosition, tableName |
Fields inherited from class org.apache.derby.impl.sql.execute.rts.RealBasicNoPutResultSetStatistics |
closeTime, constructorTime, inspectDesc, inspectNum, inspectOverall, nextTime, numOpens, openTime, optimizerEstimatedCost, optimizerEstimatedRowCount, rowsFiltered, rowsSeen |
Constructor Summary |
RealDistinctScanStatistics(int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
java.lang.String tableName,
java.lang.String indexName,
boolean isConstraint,
int hashtableSize,
int[] hashKeyColumns,
java.lang.String scanQualifiers,
java.lang.String nextQualifiers,
java.util.Properties scanProperties,
java.lang.String startPosition,
java.lang.String stopPosition,
java.lang.String isolationLevel,
java.lang.String lockString,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost)
|
Method Summary |
void |
accept(XPLAINVisitor visitor)
This method gets called to let a visitor visit this XPLAINable object. |
java.lang.String |
getNodeName()
Format for display, a name for this node. |
java.lang.String |
getNodeOn()
If this node is on a database item (like a table or an index), then provide a
string that describes the on item. |
java.lang.String |
getRSXplainType()
|
java.lang.String |
getScanStatisticsText(java.lang.String tableName,
int depth)
Return information on the scan nodes from the statement execution
plan as a String. |
java.lang.String |
getStatementExecutionPlanText(int depth)
Return the statement execution plan as a String. |
java.lang.String |
toString()
|
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
RealDistinctScanStatistics
public RealDistinctScanStatistics(int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
java.lang.String tableName,
java.lang.String indexName,
boolean isConstraint,
int hashtableSize,
int[] hashKeyColumns,
java.lang.String scanQualifiers,
java.lang.String nextQualifiers,
java.util.Properties scanProperties,
java.lang.String startPosition,
java.lang.String stopPosition,
java.lang.String isolationLevel,
java.lang.String lockString,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost)
getStatementExecutionPlanText
public java.lang.String getStatementExecutionPlanText(int depth)
- Return the statement execution plan as a String.
- Specified by:
getStatementExecutionPlanText
in interface ResultSetStatistics
- Overrides:
getStatementExecutionPlanText
in class RealHashScanStatistics
- Parameters:
depth
- Indentation level.
- Returns:
- String The statement executio plan as a String.
getScanStatisticsText
public java.lang.String getScanStatisticsText(java.lang.String tableName,
int depth)
- Return information on the scan nodes from the statement execution
plan as a String.
- Specified by:
getScanStatisticsText
in interface ResultSetStatistics
- Overrides:
getScanStatisticsText
in class RealHashScanStatistics
- Parameters:
depth
- Indentation level.tableName
- if not NULL then print information for this table only
- Returns:
- String The information on the scan nodes from the
statement execution plan as a String.
toString
public java.lang.String toString()
- Overrides:
toString
in class RealHashScanStatistics
getNodeOn
public java.lang.String getNodeOn()
- If this node is on a database item (like a table or an index), then provide a
string that describes the on item.
- Overrides:
getNodeOn
in class RealHashScanStatistics
getNodeName
public java.lang.String getNodeName()
- Format for display, a name for this node.
- Overrides:
getNodeName
in class RealHashScanStatistics
accept
public void accept(XPLAINVisitor visitor)
- Description copied from interface:
XPLAINable
- This method gets called to let a visitor visit this XPLAINable object.
The general contract is to implement pre-order, depth-first traversal
to produce a predictable traversal behaviour.
- Specified by:
accept
in interface XPLAINable
- Overrides:
accept
in class RealHashScanStatistics
getRSXplainType
public java.lang.String getRSXplainType()
- Specified by:
getRSXplainType
in interface XPLAINable
- Overrides:
getRSXplainType
in class RealHashScanStatistics
Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.