Enum ArrowType 

pub enum ArrowType {
    Null,
    Boolean,
    Int8,
    Int16,
    Int32,
    Int64,
    UInt8,
    UInt16,
    UInt32,
    UInt64,
    Float32,
    Float64,
    Date32,
    Date64,
    Time32(TimeUnit),
    Time64(TimeUnit),
    Duration32(TimeUnit),
    Duration64(TimeUnit),
    Timestamp(TimeUnit, Option<String>),
    Interval(IntervalUnit),
    String,
    LargeString,
    Utf8View,
    Dictionary(CategoricalIndexType),
}

ArrowType

Unified representation of supported Apache Arrow data types in Minarrow.

Purpose

• Encodes the physical type and, for temporal variants, associated unit information for all supported Minarrow arrays.
• Provides a single discriminant used across the crate for schema definitions, type matching, and Arrow FFI export.
• Implements a focused subset of the official Arrow type specification:
  https://arrow.apache.org/docs/python/api/datatypes.html.

Coverage

• Core primitives: integer, floating-point, boolean.
• Strings: UTF-8 (String) and optionally large UTF-8 (LargeString).
• Dictionary-encoded strings: via Dictionary(CategoricalIndexType).
• Optional temporal types: date, time, duration, timestamp, and interval with explicit units.
• Null: placeholder or metadata-only fields.

Interoperability

• Directly compatible with the Apache Arrow C Data Interface type descriptors.
• Preserves type and temporal unit information when arrays are transmitted over FFI.
• Simplifies Minarrow’s type system (e.g., one DatetimeArray type) while tagging ArrowType on Field for ecosystem compatibility.

Notes

• For DatetimeArray types, ArrowType reflects only the physical encoding.
  Logical distinctions (e.g., interpreting a Date64 as a timestamp vs. a duration) are stored in Field metadata.
• Dictionary key widths are defined by the associated CategoricalIndexType.

Variants

Null

Boolean

Int8

Int16

Int32

Int64

UInt8

UInt16

UInt32

UInt64

Float32

Float64

Date32

Date64

Time32(TimeUnit)

Time64(TimeUnit)

Duration32(TimeUnit)

Duration64(TimeUnit)

Timestamp(TimeUnit, Option<String>)

Interval(IntervalUnit)

String

LargeString

Utf8View

Dictionary(CategoricalIndexType)

Trait Implementations

impl Clone for ArrowType

fn clone(&self) -> ArrowType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ArrowType

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

Formats the value using the given formatter.

impl Display for ArrowType

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

Render the ArrowType as its variant name, including associated units where applicable.

impl Hash for ArrowType

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 PartialEq for ArrowType

fn eq(&self, other: &ArrowType) -> 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 Eq for ArrowType

impl StructuralPartialEq for ArrowType