Enum DataTypeSnapshot 

#[repr(u8)]
pub enum DataTypeSnapshot {
    Blob = 80,
    Boolean = 48,
    Custom(Box<CustomDataTypeSnapshot>),
    Date = 64,
    Datetime = 65,
    Decimal = 34,
    Float32 = 32,
    Float64 = 33,
    Int16 = 2,
    Int32 = 3,
    Int64 = 4,
    Int8 = 1,
    Json = 96,
    Text = 81,
    Uuid = 82,
    Uint16 = 17,
    Uint32 = 18,
    Uint64 = 19,
    Uint8 = 16,
}

Stable, tag-keyed encoding of a column data type.

The discriminants are part of the on-disk format and must not be reused or reordered; new variants must take a fresh tag.

Variants

Blob = 80

Arbitrary binary blob.

Boolean = 48

Boolean value.

Custom(Box<CustomDataTypeSnapshot>)

User-defined custom data type, identified by name + on-disk wire layout.

Date = 64

Calendar date with no time component.

Datetime = 65

Date and time.

Decimal = 34

Arbitrary-precision decimal number.

Float32 = 32

32-bit IEEE-754 floating point.

Float64 = 33

64-bit IEEE-754 floating point.

Int16 = 2

Signed 16-bit integer.

Int32 = 3

Signed 32-bit integer.

Int64 = 4

Signed 64-bit integer.

Int8 = 1

Signed 8-bit integer.

Json = 96

JSON document.

Text = 81

UTF-8 text string.

Uuid = 82

UUID value.

Uint16 = 17

Unsigned 16-bit integer.

Uint32 = 18

Unsigned 32-bit integer.

Uint64 = 19

Unsigned 64-bit integer.

Uint8 = 16

Unsigned 8-bit integer.

Trait Implementations

impl Clone for DataTypeSnapshot

fn clone(&self) -> DataTypeSnapshot

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for DataTypeSnapshot

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

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for DataTypeSnapshot

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Encode for DataTypeSnapshot

const ALIGNMENT: PageOffset = 32

The alignment requirement in bytes for the data type.

const SIZE: DataSize = DataSize::Dynamic

The size characteristic of the data type.

fn size(&self) -> MSize

Returns the size in bytes of the encoded data type.

fn encode(&self) -> Cow<'_, [u8]>

Encodes the data type into a vector of bytes.

fn decode(data: Cow<'_, [u8]>) -> MemoryResult<Self>

where Self: Sized,

Decodes the data type from a slice of bytes.

impl PartialEq for DataTypeSnapshot

fn eq(&self, other: &DataTypeSnapshot) -> 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 Serialize for DataTypeSnapshot

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.

impl Eq for DataTypeSnapshot

impl StructuralPartialEq for DataTypeSnapshot