ResultSetStatistics (Apache Derby V10.14 Internals)

All Superinterfaces:

XPLAINable

All Known Implementing Classes:

RealAnyResultSetStatistics, RealBasicNoPutResultSetStatistics, RealCurrentOfStatistics, RealDeleteCascadeResultSetStatistics, RealDeleteResultSetStatistics, RealDeleteVTIResultSetStatistics, RealDistinctScalarAggregateStatistics, RealDistinctScanStatistics, RealGroupedAggregateStatistics, RealHashJoinStatistics, RealHashLeftOuterJoinStatistics, RealHashScanStatistics, RealHashTableStatistics, RealIndexRowToBaseRowStatistics, RealInsertResultSetStatistics, RealInsertVTIResultSetStatistics, RealJoinResultSetStatistics, RealLastIndexKeyScanStatistics, RealMaterializedResultSetStatistics, RealNestedLoopJoinStatistics, RealNestedLoopLeftOuterJoinStatistics, RealNoPutResultSetStatistics, RealNormalizeResultSetStatistics, RealNoRowsResultSetStatistics, RealOnceResultSetStatistics, RealProjectRestrictStatistics, RealRowCountStatistics, RealRowResultSetStatistics, RealScalarAggregateStatistics, RealScrollInsensitiveResultSetStatistics, RealSetOpResultSetStatistics, RealSortStatistics, RealTableScanStatistics, RealUnionResultSetStatistics, RealUpdateResultSetStatistics, RealVTIStatistics, RealWindowResultSetStatistics
```
public interface ResultSetStatistics
extends XPLAINable
```
The ResultSetStatistics interface is used to provide run time statistics information on a specific ResultSet.
This interface extends Formatable so that all objects which implement this interface can be easily saved to the database.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`double`	`getEstimatedRowCount()`	Get the estimated row count for the number of rows returned by the associated query or statement.
`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.

Methods inherited from interface org.apache.derby.iapi.sql.execute.xplain.XPLAINable
accept, getResultSetDescriptor, getResultSetTimingsDescriptor, getRSXplainDetails, getRSXplainType, getScanPropsDescriptor, getSortPropsDescriptor

- Method Detail
  - getStatementExecutionPlanText
```
java.lang.String getStatementExecutionPlanText(int depth)
```
    Return the statement execution plan as a String.
    
    Parameters:
    
    depth - Indentation level.
    
    Returns:
    
    String The statement execution plan as a String.
  - getScanStatisticsText
```
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 return information for this table only
    
    Returns:
    
    String The information on the scan nodes from the statement execution plan as a String.
  - getEstimatedRowCount
```
double getEstimatedRowCount()
```
    Get the estimated row count for the number of rows returned by the associated query or statement.
    
    Returns:
    
    The estimated number of rows returned by the associated query or statement.

Interface ResultSetStatistics

Method Summary

Methods inherited from interface org.apache.derby.iapi.sql.execute.xplain.XPLAINable

Method Detail

getStatementExecutionPlanText

getScanStatisticsText

getEstimatedRowCount