Interface ResultSetStatistics
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- 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.
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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
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Method Detail
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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.
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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.
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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.
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