common_query::logical_plan

Module accumulator

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Expand description

Accumulator module contains the trait definition for aggregation function’s accumulators.

Structs§

  • DfAccumulatorAdaptor
    A wrapper type for our Accumulator to DataFusion’s Accumulator, so to make our Accumulator able to be executed by DataFusion query engine.

Traits§

  • Accumulator
    An accumulator represents a stateful object that lives throughout the evaluation of multiple rows and generically accumulates values.
  • AggrFuncTypeStore
    AggrFuncTypeStore stores the aggregate function’s input data’s types.
  • AggregateFunctionCreator
    An AggregateFunctionCreator dynamically creates Accumulator.

Functions§

Type Aliases§