org.apache.derby.impl.sql.execute.rts
Class RealHashTableStatistics
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.RealHashTableStatistics
- All Implemented Interfaces:
- XPLAINable, ResultSetStatistics
public class RealHashTableStatistics
- extends RealNoPutResultSetStatistics
ResultSetStatistics implemenation for HashTableResultSet.
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 |
RealHashTableStatistics(int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
int hashtableSize,
int[] hashKeyColumns,
java.lang.String nextQualifiers,
java.util.Properties scanProperties,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost,
ResultSetStatistics[] subqueryTrackingArray,
ResultSetStatistics childResultSetStatistics)
|
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 |
getRSXplainDetails()
|
java.lang.String |
getRSXplainType()
|
java.lang.Object |
getScanPropsDescriptor(java.lang.Object scanPropsID)
|
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 |
hashtableSize
public int hashtableSize
hashKeyColumns
public int[] hashKeyColumns
isolationLevel
public java.lang.String isolationLevel
nextQualifiers
public java.lang.String nextQualifiers
scanProperties
public FormatableProperties scanProperties
childResultSetStatistics
public ResultSetStatistics childResultSetStatistics
subqueryTrackingArray
public ResultSetStatistics[] subqueryTrackingArray
RealHashTableStatistics
public RealHashTableStatistics(int numOpens,
int rowsSeen,
int rowsFiltered,
long constructorTime,
long openTime,
long nextTime,
long closeTime,
int resultSetNumber,
int hashtableSize,
int[] hashKeyColumns,
java.lang.String nextQualifiers,
java.util.Properties scanProperties,
double optimizerEstimatedRowCount,
double optimizerEstimatedCost,
ResultSetStatistics[] subqueryTrackingArray,
ResultSetStatistics childResultSetStatistics)
getStatementExecutionPlanText
public java.lang.String getStatementExecutionPlanText(int depth)
- Return the statement execution plan as a String.
- 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.
- 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 java.lang.Object
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 RealBasicNoPutResultSetStatistics
getNodeName
public java.lang.String getNodeName()
- Format for display, a name for this node.
- Specified by:
getNodeName
in class RealBasicNoPutResultSetStatistics
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.
getRSXplainType
public java.lang.String getRSXplainType()
getRSXplainDetails
public java.lang.String getRSXplainDetails()
- Specified by:
getRSXplainDetails
in interface XPLAINable
- Overrides:
getRSXplainDetails
in class RealBasicNoPutResultSetStatistics
getScanPropsDescriptor
public java.lang.Object getScanPropsDescriptor(java.lang.Object scanPropsID)
- Specified by:
getScanPropsDescriptor
in interface XPLAINable
- Overrides:
getScanPropsDescriptor
in class RealBasicNoPutResultSetStatistics
Apache Derby V10.6 Internals - Copyright © 2004,2007 The Apache Software Foundation. All Rights Reserved.