Method signature

datafusion/expr/src/udaf.rs:219–221

Returns this function's signature (what input types are accepted) See [`AggregateUDFImpl::signature`] for more details.

(&self)

    ///
    /// See [`AggregateUDFImpl::signature`] for more details.
    pub fn signature(&self) -> &Signature {
        self.inner.signature()
    }

    /// Return the type of the function given its input types
    ///