Enum MetadataReadGuard

pub enum MetadataReadGuard<'a, T>
where
    T: PolarsDataType + 'a,
{
    Unlocked(RwLockReadGuard<'a, Metadata<T>>),
    Locked(&'a Metadata<T>),
}

A read guard for Metadata

Variants

Unlocked(RwLockReadGuard<'a, Metadata<T>>)

Locked(&'a Metadata<T>)

Methods from Deref<Target = Metadata<T>>

pub const DEFAULT: Metadata<T> = _

pub fn filter_props_cast<O>(&self, props: MetadataProperties) -> Metadata<O>

where O: PolarsDataType,

Create a Metadata with only the properties set in props.

pub fn filter_props(&self, props: MetadataProperties) -> Metadata<T>

Create a Metadata with only the properties set in props.

pub fn merge(&self, other: Metadata<T>) -> MetadataMerge<T>

Merge the maximum information from both Metadatas into one Metadata.

It returns

• MetadataMerge::Keep if the self already contains all the information
• MetadataMerge::New(md) if we have learned new information
• MetadataMerge::Conflict if the two structures contain conflicting metadata

pub fn is_empty(&self) -> bool

pub fn is_sorted_ascending(&self) -> bool

pub fn is_sorted_descending(&self) -> bool

pub fn get_fast_explode_list(&self) -> bool

pub fn is_sorted_any(&self) -> bool

pub fn is_sorted(&self) -> IsSorted

pub fn get_flags(&self) -> MetadataFlags

pub fn get_min_value(&self) -> Option<&<T as PolarsDataType>::OwnedPhysical>

pub fn get_max_value(&self) -> Option<&<T as PolarsDataType>::OwnedPhysical>

pub fn get_distinct_count(&self) -> Option<u32>

Trait Implementations

impl<'a, T> Deref for MetadataReadGuard<'a, T>

where T: PolarsDataType + 'a,

type Target = Metadata<T>

The resulting type after dereferencing.

fn deref(&self) -> &<MetadataReadGuard<'a, T> as Deref>::Target

Dereferences the value.