Trait arrow_array::types::DecimalType

pub trait DecimalType: 'static + Send + Sync + ArrowPrimitiveType + DecimalTypeSealed {
    const BYTE_LENGTH: usize;
    const MAX_PRECISION: u8;
    const MAX_SCALE: u8;
    const TYPE_CONSTRUCTOR: fn(_: u8, _: u8) -> DataType;
    const DEFAULT_TYPE: DataType;

    fn format_decimal(value: Self::Native, precision: u8, scale: u8) -> String;
    fn validate_decimal_precision(
        value: Self::Native,
        precision: u8
    ) -> Result<(), ArrowError>;
}

A trait over the decimal types, used by DecimalArray to provide a generic implementation across the various decimal types

Implemented by Decimal128Type and Decimal256Type for Decimal128Array and Decimal256Array respectively

Required Associated Constants

const BYTE_LENGTH: usize

const MAX_PRECISION: u8

const MAX_SCALE: u8

const TYPE_CONSTRUCTOR: fn(_: u8, _: u8) -> DataType

const DEFAULT_TYPE: DataType

Required Methods

fn format_decimal(value: Self::Native, precision: u8, scale: u8) -> String

Formats the decimal value with the provided precision and scale

fn validate_decimal_precision(
    value: Self::Native,
    precision: u8
) -> Result<(), ArrowError>

Validates that value contains no more than precision decimal digits

Implementors

impl DecimalType for Decimal128Type

const BYTE_LENGTH: usize = 16usize

const MAX_PRECISION: u8 = 38u8

const MAX_SCALE: u8 = 38u8

const TYPE_CONSTRUCTOR: fn(_: u8, _: u8) -> DataType = {arrow_schema::DataType::Decimal128 as fn(u8, u8) -> arrow_schema::DataType}

const DEFAULT_TYPE: DataType = _

impl DecimalType for Decimal256Type

const BYTE_LENGTH: usize = 32usize

const MAX_PRECISION: u8 = 76u8

const MAX_SCALE: u8 = 76u8

const TYPE_CONSTRUCTOR: fn(_: u8, _: u8) -> DataType = {arrow_schema::DataType::Decimal256 as fn(u8, u8) -> arrow_schema::DataType}

const DEFAULT_TYPE: DataType = _