Struct mz_persist_types::dyn_col::DynColumnRef

pub struct DynColumnRef(DataType, Arc<dyn Any + Send + Sync>);

A type-erased crate::columnar::Data::Col.

Tuple Fields

0: DataType

1: Arc<dyn Any + Send + Sync>

Implementations

impl DynColumnRef

fn new<T: Data>(col: T::Col) -> Self

pub(crate) fn typ(&self) -> &DataType

pub fn downcast<T: Data>(self) -> Result<Arc<T::Col>, String>

Returns the inner value if it is a column of type T, or an Err if it isn’t.

pub fn downcast_ref<T: Data>(&self) -> Result<&T::Col, String>

Returns a typed, shared reference to the inner value if it is a column of type T, or an Err if it isn’t.

pub fn len(&self) -> usize

Returns the number of elements in this column.

pub fn stats_default(&self, validity: ValidityRef) -> ColumnarStats

Computes statistics on this column using the default implementation of T::Stats::From.

pub(crate) fn from_arrow( data_type: &DataType, array: &dyn Array, ) -> Result<Self, String>

pub(crate) fn to_arrow(&self) -> (Arc<dyn Array>, bool)

Trait Implementations

impl Clone for DynColumnRef

fn clone(&self) -> DynColumnRef

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DynColumnRef

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

Formats the value using the given formatter.

impl From<DynColumnMut> for DynColumnRef

fn from(value: DynColumnMut) -> Self

Converts to this type from the input type.