Function datafusion::physical_expr::functions::make_scalar_function

pub fn make_scalar_function<F>(
    inner: F,
) -> Arc<dyn Fn(&[ColumnarValue]) -> Result<ColumnarValue, DataFusionError> + Send + Sync>
where
    F: Fn(&[Arc<dyn Array>]) -> Result<Arc<dyn Array>, DataFusionError> + Sync + Send + 'static,

👎Deprecated since 36.0.0: Implement your function directly in terms of ColumnarValue or use ScalarUDF instead

Decorates a function to handle ScalarValues by converting them to arrays before calling the function and vice-versa after evaluation. Note that this function makes a scalar function with no arguments or all scalar inputs return a scalar. That’s said its output will be same for all input rows in a batch.