Struct scylla::frame::value::CqlDecimal

pub struct CqlDecimal { /* private fields */ }

Native CQL decimal representation.

Represented as a pair:

• a CqlVarint value
• 32-bit integer which determines the position of the decimal point

The type is not very useful in most use cases. However, users can make use of more complex types such as bigdecimal::BigDecimal (v0.4). The library support (e.g. conversion from CqlValue) for the type is enabled via bigdecimal-04 crate feature.

DB data format

Notice that constructors don’t perform any normalization on the provided data. For more details, see CqlVarint documentation.

Implementations

impl CqlDecimal

Constructors

pub fn from_signed_be_bytes_and_exponent( bytes: Vec<u8>, scale: i32 ) -> CqlDecimal

Creates a CqlDecimal from an array of bytes representing CqlVarint and a 32-bit scale.

See: disclaimer about non-normalized values.

pub fn from_signed_be_bytes_slice_and_exponent( bytes: &[u8], scale: i32 ) -> CqlDecimal

Creates a CqlDecimal from a slice of bytes representing CqlVarint and a 32-bit scale.

See: disclaimer about non-normalized values.

impl CqlDecimal

Conversion to raw bytes

pub fn as_signed_be_bytes_slice_and_exponent(&self) -> (&[u8], i32)

Returns a slice of bytes in two’s complement binary big-endian representation and a scale.

pub fn into_signed_be_bytes_and_exponent(self) -> (Vec<u8>, i32)

Converts CqlDecimal to an array of bytes in two’s complement binary big-endian representation and a scale.

Trait Implementations

impl Clone for CqlDecimal

fn clone(&self) -> CqlDecimal

Returns a copy of the value.

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

Performs copy-assignment from source.

impl Debug for CqlDecimal

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

Formats the value using the given formatter.

impl FromCqlVal<CqlValue> for CqlDecimal

fn from_cql(cql_val: CqlValue) -> Result<CqlDecimal, FromCqlValError>

impl PartialEq for CqlDecimal

fn eq(&self, other: &CqlDecimal) -> bool

This method tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

This method tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl SerializeCql for CqlDecimal

fn serialize<'b>( &self, typ: &ColumnType, writer: CellWriter<'b> ) -> Result<WrittenCellProof<'b>, SerializationError>

Serializes the value to given CQL type.

impl TryFrom<BigDecimal> for CqlDecimal

Available on crate feature bigdecimal-04 only.

type Error = <i64 as TryInto<i32>>::Error

The type returned in the event of a conversion error.

fn try_from( value: BigDecimal ) -> Result<CqlDecimal, <CqlDecimal as TryFrom<BigDecimal>>::Error>

Performs the conversion.

impl Value for CqlDecimal

fn serialize(&self, buf: &mut Vec<u8>) -> Result<(), ValueTooBig>

impl Eq for CqlDecimal

impl StructuralPartialEq for CqlDecimal