Module datafusion_expr::function
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Function module contains typing and signature for built-in and user defined functions.
Functions
Returns the datatype of the scalar function
the signatures supported by the function
fun.Type Definitions
Factory that returns an accumulator for the given aggregate, given
its return datatype.
Factory that returns the functions’s return type given the input argument types
Scalar function
Factory that returns the types used by an aggregator to serialize
its state, given its return datatype.