Enum TypeId 

#[non_exhaustive]
#[repr(u8)]
pub enum TypeId {
    Null = 31,
    Int1 = 48,
    Bit = 50,
    Int2 = 52,
    Int4 = 56,
    Int8 = 127,
    DateTimeN = 111,
    Float4 = 59,
    Float8 = 62,
    Money = 60,
    Money4 = 122,
    DateTime = 61,
    DateTime4 = 58,
    Guid = 36,
    IntN = 38,
    Decimal = 55,
    Numeric = 63,
    BitN = 104,
    DecimalN = 106,
    NumericN = 108,
    FloatN = 109,
    MoneyN = 110,
    Char = 47,
    VarChar = 39,
    Binary = 45,
    VarBinary = 37,
    BigVarChar = 167,
    BigVarBinary = 165,
    BigChar = 175,
    BigBinary = 173,
    NChar = 239,
    NVarChar = 231,
    Text = 35,
    Image = 34,
    NText = 99,
    Date = 40,
    Time = 41,
    DateTime2 = 42,
    DateTimeOffset = 43,
    Variant = 98,
    Udt = 240,
    Xml = 241,
    Tvp = 243,
}

TDS data type identifiers.

These correspond to the type bytes sent in column metadata and parameter definitions.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Null = 31

Null type.

Int1 = 48

8-bit signed integer.

Bit = 50

Bit (boolean).

Int2 = 52

16-bit signed integer.

Int4 = 56

32-bit signed integer.

Int8 = 127

64-bit signed integer.

DateTimeN = 111

4-byte datetime.

Float4 = 59

32-bit floating point.

Float8 = 62

64-bit floating point.

Money = 60

8-byte money.

Money4 = 122

4-byte money.

DateTime = 61

4-byte datetime.

DateTime4 = 58

4-byte small datetime.

Guid = 36

Variable-length GUID.

IntN = 38

Variable-length integer.

Decimal = 55

Variable-length decimal.

Numeric = 63

Variable-length numeric.

BitN = 104

Variable-length bit.

DecimalN = 106

Variable-length decimal (newer).

NumericN = 108

Variable-length numeric (newer).

FloatN = 109

Variable-length float.

MoneyN = 110

Variable-length money.

Char = 47

Fixed-length character.

VarChar = 39

Variable-length character.

Binary = 45

Fixed-length binary.

VarBinary = 37

Variable-length binary.

BigVarChar = 167

Large variable-length character.

BigVarBinary = 165

Large variable-length binary.

BigChar = 175

Large fixed-length character.

BigBinary = 173

Large fixed-length binary.

NChar = 239

Fixed-length Unicode character.

NVarChar = 231

Variable-length Unicode character.

Text = 35

Text (deprecated, use varchar(max)).

Image = 34

Image (deprecated, use varbinary(max)).

NText = 99

NText (deprecated, use nvarchar(max)).

Date = 40

Date (3 bytes).

Time = 41

Time with variable precision.

DateTime2 = 42

DateTime2 with variable precision.

DateTimeOffset = 43

DateTimeOffset with variable precision.

Variant = 98

SQL Variant.

Udt = 240

User-defined type.

Xml = 241

XML type.

Tvp = 243

Table-valued parameter.

Implementations

impl TypeId

pub fn from_u8(value: u8) -> Option<Self>

Create a type ID from a raw byte.

pub const fn is_fixed_length(&self) -> bool

Check if this is a fixed-length type.

pub const fn is_variable_length(&self) -> bool

Check if this is a variable-length type.

pub const fn is_plp(&self) -> bool

Check if this type always uses PLP (Partially Length-Prefixed) encoding.

Note: NVarChar, BigVarChar, and BigVarBinary also use PLP encoding when declared as MAX types (max_length == 0xFFFF). This function only returns true for types that always use PLP.

pub const fn can_be_max(&self) -> bool

Check if this type can use PLP encoding when declared as MAX.

Returns true for types that use PLP when max_length == 0xFFFF:

• NVARCHAR(MAX)
• VARCHAR(MAX)
• VARBINARY(MAX)

pub const fn is_unicode(&self) -> bool

Check if this is a Unicode type.

pub const fn is_datetime(&self) -> bool

Check if this is a date/time type.

pub const fn fixed_size(&self) -> Option<usize>

Get the fixed size of this type in bytes, if applicable.

Trait Implementations

impl Clone for TypeId

fn clone(&self) -> TypeId

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for TypeId

impl Debug for TypeId

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

Formats the value using the given formatter.

impl Eq for TypeId

impl Hash for TypeId

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for TypeId

fn eq(&self, other: &TypeId) -> 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 StructuralPartialEq for TypeId