Packages

class DeltaAggregate extends ArrowAggregate

Returns batches of [threading key][dictionary deltas][record batch]. Will sort each batch, but not between batches.

Linear Supertypes
ArrowAggregate, Result, AnyRef, Any
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Inherited
  1. DeltaAggregate
  2. ArrowAggregate
  3. Result
  4. AnyRef
  5. Any
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Visibility
  1. Public
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Instance Constructors

  1. new DeltaAggregate(sft: SimpleFeatureType, dictionaryFields: Seq[String], encoding: SimpleFeatureEncoding, ipcOpts: IpcOption, sort: Option[(String, Boolean)], batchSize: Int)

    sft

    simple feature type

    dictionaryFields

    dictionary fields

    encoding

    arrow encoding

    sort

    sort field, sort reverse

    batchSize

    batch size

Value Members

  1. def aggregate(sf: SimpleFeature): Int

    Aggregate a feature.

    Aggregate a feature. May be called anytime after init

    sf

    simple feature

    returns

    number of entries aggregated

    Definition Classes
    DeltaAggregate → Result
  2. def cleanup(): Unit

    Dispose of any resources used by the scan.

    Dispose of any resources used by the scan. If the result is re-used, init will be called again before anything else

    Definition Classes
    DeltaAggregate → Result
  3. def encode(): Array[Byte]

    Encode current aggregation and reset the result.

    Encode current aggregation and reset the result. May be called anytime after init

    Definition Classes
    DeltaAggregate → Result
  4. def init(): Unit

    Initialize the result for a scan

    Initialize the result for a scan

    Definition Classes
    DeltaAggregate → Result