All Superinterfaces:

QueryMetrics<TopNQuery>

All Known Implementing Classes:

DefaultTopNQueryMetrics
```
public interface TopNQueryMetrics
extends QueryMetrics<TopNQuery>
```
Specialization of QueryMetrics for TopNQuery.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`TopNQueryMetrics`	`addProcessedRows(long numRows)`	Called with the number of rows, processed via each cursor, processed for the query within the segment.
`void`	`algorithm(TopNAlgorithm algorithm)`
`void`	`columnValueSelector(ColumnValueSelector columnValueSelector)`	This method is called exactly once with the columnValueSelector object of each cursor, processed for the query.
`void`	`cursor(Cursor cursor)`	This method is called exactly once with each cursor, processed for the query.
`void`	`dimension(TopNQuery query)`	Sets `TopNQuery.getDimensionSpec()`.`getDimension()` of the given query as dimension.
`void`	`dimensionCardinality(int cardinality)`
`void`	`granularity(TopNQuery query)`	Sets the granularity of `BaseQuery.getGranularity()` of the given query as dimension.
`void`	`numComplexMetrics(TopNQuery query)`	Sets the number of "complex" metrics of the given topN query as dimension.
`void`	`numMetrics(TopNQuery query)`	Sets the number of metrics of the given topN query as dimension.
`void`	`numValuesPerPass(TopNParams params)`	This method may set `TopNParams.getNumValuesPerPass()` of the query as dimension.
`void`	`startRecordingScanTime()`	Calls to this method and `stopRecordingScanTime()` wrap scanning of each cursor, processed for the query.
`TopNQueryMetrics`	`stopRecordingScanTime()`	Calls of `startRecordingScanTime()` and this method wrap scanning of each cursor, processed for the query.
`void`	`threshold(TopNQuery query)`	Sets `TopNQuery.getThreshold()` of the given query as dimension.

Methods inherited from interface org.apache.druid.query.QueryMetrics
context, dataSource, duration, emit, hasFilters, identity, interval, makeBitmapResultFactory, parallelMergeParallelism, postFilters, preFilters, query, queryId, queryId, queryType, remoteAddress, reportBackPressureTime, reportBitmapConstructionTime, reportCpuTime, reportNodeBytes, reportNodeTime, reportNodeTimeToFirstByte, reportParallelMergeFastestPartitionTime, reportParallelMergeInputRows, reportParallelMergeInputSequences, reportParallelMergeOutputRows, reportParallelMergeParallelism, reportParallelMergeSlowestPartitionTime, reportParallelMergeTaskCount, reportParallelMergeTotalCpuTime, reportParallelMergeTotalTime, reportPreFilteredRows, reportQueriedSegmentCount, reportQueryBytes, reportQueryTime, reportSegmentAndCacheTime, reportSegmentRows, reportSegmentTime, reportWaitTime, segment, server, sqlQueryId, sqlQueryId, status, subQueryId, success, vectorized

- Method Detail
  - threshold
```
void threshold(TopNQuery query)
```
    Sets TopNQuery.getThreshold() of the given query as dimension.
  - dimension
```
void dimension(TopNQuery query)
```
    Sets TopNQuery.getDimensionSpec().getDimension() of the given query as dimension.
  - numMetrics
```
void numMetrics(TopNQuery query)
```
    Sets the number of metrics of the given topN query as dimension.
  - numComplexMetrics
```
void numComplexMetrics(TopNQuery query)
```
    Sets the number of "complex" metrics of the given topN query as dimension. By default it is assumed that "complex" metric is a metric of not long or double type, but it could be redefined in the implementation of this method.
  - granularity
```
void granularity(TopNQuery query)
```
    Sets the granularity of BaseQuery.getGranularity() of the given query as dimension.
  - dimensionCardinality
```
void dimensionCardinality(int cardinality)
```
  - algorithm
```
void algorithm(TopNAlgorithm algorithm)
```
  - cursor
```
void cursor(Cursor cursor)
```
    This method is called exactly once with each cursor, processed for the query.
  - columnValueSelector
```
void columnValueSelector(ColumnValueSelector columnValueSelector)
```
    This method is called exactly once with the columnValueSelector object of each cursor, processed for the query.
  - numValuesPerPass
```
void numValuesPerPass(TopNParams params)
```
    This method may set TopNParams.getNumValuesPerPass() of the query as dimension.
  - addProcessedRows
```
TopNQueryMetrics addProcessedRows(long numRows)
```
    Called with the number of rows, processed via each cursor, processed for the query within the segment. The total number of processed rows, reported via this method for a TopNQueryMetrics instance, is smaller or equal to QueryMetrics.reportPreFilteredRows(long), because QueryMetrics.postFilters(java.util.List<org.apache.druid.query.filter.Filter>) are additionally applied. If there are no postFilters, preFilteredRows and processedRows are equal.
  - startRecordingScanTime
```
void startRecordingScanTime()
```
    Calls to this method and stopRecordingScanTime() wrap scanning of each cursor, processed for the query.
  - stopRecordingScanTime
```
TopNQueryMetrics stopRecordingScanTime()
```
    Calls of startRecordingScanTime() and this method wrap scanning of each cursor, processed for the query.

Interface TopNQueryMetrics

Method Summary

Methods inherited from interface org.apache.druid.query.QueryMetrics

Method Detail

threshold

dimension

numMetrics

numComplexMetrics

granularity

dimensionCardinality

algorithm

cursor

columnValueSelector

numValuesPerPass

addProcessedRows

startRecordingScanTime

stopRecordingScanTime