Enum DataType 

pub enum DataType {
    Simple {
        type_name: String,
    },
    Decimal {
        precision: u32,
        scale: u32,
    },
    Array {
        element_type: Box<DataType>,
    },
    Map {
        key_type: Box<DataType>,
        value_type: Box<DataType>,
    },
    Struct(StructType),
}

Data type for a schema field.

Variants

Simple

Simple types like string, int, long, double, etc.

Fields

type_name: String

Canonical type name (e.g. “string”, “long”, “integer”).

Decimal

Decimal type with precision and scale.

Fields

precision: u32

Precision (default 10).

scale: u32

Scale (default 0).

Array

Array type with element type.

Fields

element_type: Box<DataType>

Element type.

Map

Map type with key and value types.

Fields

key_type: Box<DataType>

Key type.

value_type: Box<DataType>

Value type.

Struct(StructType)

Struct type containing fields.

Implementations

impl DataType

pub fn type_name(&self) -> &str

Returns the type name string (e.g. “struct”, “array”, “long”).

Trait Implementations

impl Clone for DataType

fn clone(&self) -> DataType

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataType

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

Formats the value using the given formatter.

impl Display for DataType

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

Formats the value using the given formatter.

impl PartialEq for DataType

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

impl StructuralPartialEq for DataType