Package org.apache.druid.query.topn.types
package org.apache.druid.query.topn.types
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ClassDescriptionNullableNumericTopNColumnAggregatesProcessor<Selector extends BaseNullableColumnValueSelector>TopNColumnAggregatesProcessor<ValueSelectorType>This
ColumnSelectorStrategyis used by allTopNAlgorithmto provide selector value cardinality toTopNParams(perhaps unecessarily, but that is another matter), but is primarily used byHeapBasedTopNAlgorithmto serve as its value aggregates store.