public class DoubleCardinalityAggregatorColumnSelectorStrategy extends Object implements CardinalityAggregatorColumnSelectorStrategy<BaseDoubleColumnValueSelector>
Constructor and Description |
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DoubleCardinalityAggregatorColumnSelectorStrategy() |
Modifier and Type | Method and Description |
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void |
hashRow(BaseDoubleColumnValueSelector dimSelector,
com.google.common.hash.Hasher hasher)
Retrieve the current row from dimSelector and add the row values to the hasher.
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void |
hashValues(BaseDoubleColumnValueSelector dimSelector,
HyperLogLogCollector collector)
Retrieve the current row from dimSelector and add the row values to HyperLogLogCollector.
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public DoubleCardinalityAggregatorColumnSelectorStrategy()
public void hashRow(BaseDoubleColumnValueSelector dimSelector, com.google.common.hash.Hasher hasher)
CardinalityAggregatorColumnSelectorStrategy
hashRow
in interface CardinalityAggregatorColumnSelectorStrategy<BaseDoubleColumnValueSelector>
dimSelector
- Dimension value selectorhasher
- Hasher used for cardinality aggregator calculationspublic void hashValues(BaseDoubleColumnValueSelector dimSelector, HyperLogLogCollector collector)
CardinalityAggregatorColumnSelectorStrategy
hashValues
in interface CardinalityAggregatorColumnSelectorStrategy<BaseDoubleColumnValueSelector>
dimSelector
- Dimension value selectorcollector
- HLL collector used for cardinality aggregator calculationsCopyright © 2011–2018. All rights reserved.