Function downcast_array

src/repr/src/row/encode.rs:1527–1532

(array: &Arc<dyn Array>)

/// very hot path and downcasting is relatively slow
#[inline]
fn downcast_array<T: 'static>(array: &Arc<dyn Array>) -> Result<&T, anyhow::Error> {
    array
        .as_any()
        .downcast_ref::<T>()
        .ok_or_else(|| anyhow!("expected {}, found {array:?}", std::any::type_name::<T>()))
}

/// Small helper function to downcast from an array to a [`DatumColumnDecoder`].
///