final case class Reduce[T[_[_]], A](src: A, bucket: slamdata.Predef.List[FreeMap[T]], reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]], repair: FreeMapA[T, ReduceIndex]) extends QScriptCore[T, A] with Product with Serializable
Performs a reduction over a dataset, with the dataset partitioned by the result of the bucket MapFuncCore. So, rather than many-to-one, this is many-to-fewer.
bucket partitions the values into buckets based on the result of the
expression, reducers applies the provided reduction to each expression,
and repair finally turns those reduced expressions into a final value.
ReduceIndex is guaranteed to be a valid index into reducers.
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- new Reduce(src: A, bucket: slamdata.Predef.List[FreeMap[T]], reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]], repair: FreeMapA[T, ReduceIndex])
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- val bucket: slamdata.Predef.List[FreeMap[T]]
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- val reducers: slamdata.Predef.List[ReduceFunc[FreeMap[T]]]
- val repair: FreeMapA[T, ReduceIndex]
- val src: A
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