Struct RowFn 

pub struct RowFn<F> { /* private fields */ }

Row-at-a-time adapter wrapping a closure into a ScalarPluginFn.

This is the convenience path for plugin authors who don’t care about vectorization. The default columnar contract is preferred for hot-path UDFs; use RowFn for one-off ad-hoc fns where per-row author ergonomics matter more than per-row performance.

Implementations

impl<F> RowFn<F>

pub fn new(signature: FnSignature, f: F) -> Self

Wrap a row-shaped closure into a scalar plugin fn.

Trait Implementations

impl<F> Debug for RowFn<F>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<F> ScalarPluginFn for RowFn<F>

where F: Send + Sync + 'static,

fn signature(&self) -> &FnSignature

The function’s static signature (arg types, return type, volatility).

fn invoke( &self, _args: &[ColumnarValue], _rows: usize, ) -> Result<ColumnarValue, FnError>

Invoke the function on a batch of inputs.