Module function

Function module contains typing and signature for built-in and user defined functions.

Structs

AccumulatorArgs

AccumulatorArgs contains information about how an aggregate function was called, including the types of its arguments and any optional ordering expressions.

ExpressionArgs

Arguments passed to user-defined window function

PartitionEvaluatorArgs

Arguments passed to created user-defined window function state during physical execution.

StateFieldsArgs

StateFieldsArgs contains information about the fields that an aggregate function’s accumulator should have. Used for AggregateUDFImpl::state_fields.

WindowUDFFieldArgs

Metadata for defining the result field from evaluating a user-defined window function.

Enums

Hint

Type Aliases

AccumulatorFactoryFunction

Factory that returns an accumulator for the given aggregate function.

AggregateFunctionSimplification

crate::udaf::AggregateUDFImpl::simplify simplifier closure A closure with two arguments:

PartitionEvaluatorFactory

Factory that creates a PartitionEvaluator for the given window function

ReturnTypeFunction

Factory that returns the functions’s return type given the input argument types

ScalarFunctionImplementation

Scalar function

StateTypeFunction

Factory that returns the types used by an aggregator to serialize its state, given its return datatype.

WindowFunctionSimplification

crate::udwf::WindowUDFImpl::simplify simplifier closure A closure with two arguments: