Enum Feature

#[repr(i64)]
pub enum Feature {
    Unused = 0,
    DictionaryReplacement = 1,
    CompressedBody = 2,
}

Represents Arrow Features that might not have full support within implementations. This is intended to be used in two scenarios:

1. A mechanism for readers of Arrow Streams and files to understand that the stream or file makes use of a feature that isn’t supported or unknown to the implementation (and therefore can meet the Arrow forward compatibility guarantees).
2. A means of negotiating between a client and server what features a stream is allowed to use. The enums values here are intended to represent higher level features, additional details may be negotiated with key-value pairs specific to the protocol.

Enums added to this list should be assigned power-of-two values to facilitate exchanging and comparing bitmaps for supported features.

Generated from these locations:

• Enum Feature in the file Schema.fbs:71

Variants

Unused = 0

Needed to make flatbuffers happy.

DictionaryReplacement = 1

The stream makes use of multiple full dictionaries with the same ID and assumes clients implement dictionary replacement correctly.

CompressedBody = 2

The stream makes use of compressed bodies as described in Message.fbs.

Implementations

impl Feature

pub const ENUM_VALUES: [Self; 3]

Array containing all valid variants of Feature

Trait Implementations

impl Clone for Feature

fn clone(&self) -> Feature

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Feature

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for Feature

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl From<Feature> for i64

fn from(value: Feature) -> Self

Converts to this type from the input type.

impl Hash for Feature

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl Ord for Feature

fn cmp(&self, other: &Feature) -> Ordering

This method returns an Ordering between self and other.

fn max(self, other: Self) -> Self

where Self: Sized,

Compares and returns the maximum of two values.

fn min(self, other: Self) -> Self

where Self: Sized,

Compares and returns the minimum of two values.

fn clamp(self, min: Self, max: Self) -> Self

where Self: Sized,

Restrict a value to a certain interval.

impl PartialEq for Feature

fn eq(&self, other: &Feature) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl PartialOrd for Feature

fn partial_cmp(&self, other: &Feature) -> Option<Ordering>

This method returns an ordering between self and other values if one exists.

fn lt(&self, other: &Rhs) -> bool

Tests less than (for self and other) and is used by the < operator.

fn le(&self, other: &Rhs) -> bool

Tests less than or equal to (for self and other) and is used by the <= operator.

fn gt(&self, other: &Rhs) -> bool

Tests greater than (for self and other) and is used by the > operator.

fn ge(&self, other: &Rhs) -> bool

Tests greater than or equal to (for self and other) and is used by the >= operator.

impl Serialize for Feature

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl TryFrom<i64> for Feature

type Error = UnknownEnumTagKind

The type returned in the event of a conversion error.

fn try_from(value: i64) -> Result<Self, UnknownEnumTagKind>

Performs the conversion.

impl Copy for Feature

impl Eq for Feature

impl StructuralPartialEq for Feature

impl VectorWrite<Feature> for Feature

Safety

The planus compiler generates implementations that initialize the bytes in write_values.

impl WriteAs<Feature> for Feature

impl WriteAsDefault<Feature, Feature> for Feature

impl WriteAsOptional<Feature> for Feature