HistogramState (presto-main 345 API)

All Superinterfaces:

AccumulatorState

All Known Implementing Classes:

GroupedHistogramState, LegacyHistogramGroupState, SingleHistogramState
```
public interface HistogramState
extends AccumulatorState
```

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`void`	`addMemoryUsage(long memory)`
`void`	`deserialize(Block block, int expectedSize)`
`TypedHistogram`	`get()`	will create an empty histogram if none exists

Methods inherited from interface io.prestosql.spi.function.AccumulatorState
getEstimatedSize

- Method Detail
  - get
```
TypedHistogram get()
```
    will create an empty histogram if none exists
    
    Returns:
    
    histogram based on the type of state (single, grouped). Note that empty histograms will serialize to null as required
  - addMemoryUsage
```
void addMemoryUsage(long memory)
```
  - deserialize
```
void deserialize(Block block,
                 int expectedSize)
```