public interface TopNColumnSelectorStrategy<ValueSelectorType,DimExtractionAggregateStoreType extends Map> extends ColumnSelectorStrategy
Modifier and Type | Field and Description |
---|---|
static int |
CARDINALITY_UNKNOWN |
Modifier and Type | Method and Description |
---|---|
long |
dimExtractionScanAndAggregate(TopNQuery query,
ValueSelectorType selector,
Cursor cursor,
Aggregator[][] rowSelector,
DimExtractionAggregateStoreType aggregatesStore)
Used by DimExtractionTopNAlgorithm.
|
int |
getCardinality(ValueSelectorType selector) |
Aggregator[][] |
getDimExtractionRowSelector(TopNQuery query,
TopNParams params,
Capabilities capabilities)
Used by DimExtractionTopNAlgorithm.
|
ValueType |
getValueType() |
DimExtractionAggregateStoreType |
makeDimExtractionAggregateStore()
Used by DimExtractionTopNAlgorithm.
|
void |
updateDimExtractionResults(DimExtractionAggregateStoreType aggregatesStore,
com.google.common.base.Function<Object,Object> valueTransformer,
TopNResultBuilder resultBuilder)
Used by DimExtractionTopNAlgorithm.
|
static final int CARDINALITY_UNKNOWN
int getCardinality(ValueSelectorType selector)
ValueType getValueType()
Aggregator[][] getDimExtractionRowSelector(TopNQuery query, TopNParams params, Capabilities capabilities)
query
- The TopN query being servedparams
- Parameters for the TopN query being servedcapabilities
- Object indicating if dimension values are sortedDimExtractionAggregateStoreType makeDimExtractionAggregateStore()
long dimExtractionScanAndAggregate(TopNQuery query, ValueSelectorType selector, Cursor cursor, Aggregator[][] rowSelector, DimExtractionAggregateStoreType aggregatesStore)
query
- The TopN query being served.selector
- Dimension value selectorcursor
- Cursor for the segment being queriedrowSelector
- Integer lookup containing aggregatorsaggregatesStore
- Map containing aggregatorsvoid updateDimExtractionResults(DimExtractionAggregateStoreType aggregatesStore, @Nullable com.google.common.base.Function<Object,Object> valueTransformer, TopNResultBuilder resultBuilder)
aggregatesStore
- Map created by makeDimExtractionAggregateStore()valueTransformer
- Converts keys to different types, if null no conversion is neededresultBuilder
- TopN result builderCopyright © 2011–2018. All rights reserved.