Enum DataKind 

pub enum DataKind {
    Bool,
    UInt8,
    UInt16,
    UInt32,
    UInt64,
    Int64,
    Float64,
    String,
    Binary,
    FixedBinary(usize),
    TimestampMicros,
    List(Box<DataKind>),
}

Data types that can be represented in any columnar format.

These map to:

• Arrow: DataType::*
• DuckDB: LogicalType::*
• Parquet: Physical + Logical types

Variants

Bool

Boolean (true/false)

UInt8

Unsigned 8-bit integer

UInt16

Unsigned 16-bit integer

UInt32

Unsigned 32-bit integer (also used for IPv4 addresses)

UInt64

Unsigned 64-bit integer

Int64

Signed 64-bit integer

Float64

64-bit floating point

String

UTF-8 string

Binary

Variable-length binary data

FixedBinary(usize)

Fixed-size binary data (e.g., MAC address = 6, IPv6 = 16)

TimestampMicros

Timestamp with microsecond precision (UTC)

List(Box<DataKind>)

Variable-length list of elements of the same type

Implementations

impl DataKind

pub fn type_name(&self) -> &'static str

Human-readable type name for display.

pub fn fixed_size(&self) -> Option<usize>

Size in bytes for fixed-width types, None for variable-width.

pub fn list_inner(&self) -> Option<&DataKind>

Get the inner type for List, or None if not a List.

Trait Implementations

impl Clone for DataKind

fn clone(&self) -> DataKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataKind

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

Formats the value using the given formatter.

impl Display for DataKind

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

Formats the value using the given formatter.

impl Hash for DataKind

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 DataKind

fn eq(&self, other: &DataKind) -> 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 DataKind

impl StructuralPartialEq for DataKind