Enum parquet::data_type::Decimal

pub enum Decimal {
    Int32 {
        value: [u8; 4],
        precision: i32,
        scale: i32,
    },
    Int64 {
        value: [u8; 8],
        precision: i32,
        scale: i32,
    },
    Bytes {
        value: ByteArray,
        precision: i32,
        scale: i32,
    },
}

Rust representation for Decimal values.

This is not a representation of Parquet physical type, but rather a wrapper for DECIMAL logical type, and serves as container for raw parts of decimal values: unscaled value in bytes, precision and scale.

Variants

Int32

Decimal backed by i32.

Fields

value: [u8; 4]

The underlying value

precision: i32

The total number of digits in the number

scale: i32

The number of digits to the right of the decimal point

Int64

Decimal backed by i64.

Fields

value: [u8; 8]

The underlying value

precision: i32

The total number of digits in the number

scale: i32

The number of digits to the right of the decimal point

Bytes

Decimal backed by byte array.

Fields

value: ByteArray

The underlying value

precision: i32

The total number of digits in the number

scale: i32

The number of digits to the right of the decimal point

Implementations

impl Decimal

pub fn from_i32(value: i32, precision: i32, scale: i32) -> Self

Creates new decimal value from i32.

pub fn from_i64(value: i64, precision: i32, scale: i32) -> Self

Creates new decimal value from i64.

pub fn from_bytes(value: ByteArray, precision: i32, scale: i32) -> Self

Creates new decimal value from ByteArray.

pub fn data(&self) -> &[u8]

Returns bytes of unscaled value.

pub fn precision(&self) -> i32

Returns decimal precision.

pub fn scale(&self) -> i32

Returns decimal scale.

Trait Implementations

impl AsBytes for Decimal

fn as_bytes(&self) -> &[u8]

Returns slice of bytes for this data type.

impl Clone for Decimal

fn clone(&self) -> Decimal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for Decimal

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

Formats the value using the given formatter.

impl Default for Decimal

fn default() -> Self

Returns the “default value” for a type.

impl PartialEq for Decimal

fn eq(&self, other: &Decimal) -> 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.