Enum Value 

pub enum Value {
    Null,
    Boolean(Option<bool>),
    Int8(Option<i8>),
    Int16(Option<i16>),
    Int32(Option<i32>),
    Int64(Option<i64>),
    Int128(Option<i128>),
    UInt8(Option<u8>),
    UInt16(Option<u16>),
    UInt32(Option<u32>),
    UInt64(Option<u64>),
    UInt128(Option<u128>),
    Float32(Option<f32>),
    Float64(Option<f64>),
    Decimal(Option<Decimal>, u8, u8),
    Char(Option<char>),
    Varchar(Option<String>),
    Blob(Option<Box<[u8]>>),
    Date(Option<Date>),
    Time(Option<Time>),
    Timestamp(Option<PrimitiveDateTime>),
    TimestampWithTimezone(Option<OffsetDateTime>),
    Interval(Option<Interval>),
    Uuid(Option<Uuid>),
    Array(Option<Box<[Value]>>, Box<Value>, u32),
    List(Option<Vec<Value>>, Box<Value>),
    Map(Option<HashMap<Value, Value>>, Box<Value>, Box<Value>),
    Struct(Option<Vec<(String, Value)>>, Vec<(String, Value)>),
    Unknown(Option<String>),
}

Strongly-typed, nullable SQL value representation used across Tank.

Variants wrap Option<T> – None signifies SQL NULL (except Null which unconditionally represents a NULL of unknown type). Complex variants carry additional shape metadata (element type, length, precision, etc.).

Variants

Null

Untyped NULL placeholder.

Boolean(Option<bool>)

Int8(Option<i8>)

Int16(Option<i16>)

Int32(Option<i32>)

Int64(Option<i64>)

Int128(Option<i128>)

UInt8(Option<u8>)

UInt16(Option<u16>)

UInt32(Option<u32>)

UInt64(Option<u64>)

UInt128(Option<u128>)

Float32(Option<f32>)

Float64(Option<f64>)

Decimal(Option<Decimal>, u8, u8)

Arbitrary precision decimal with width/scale hints.

Char(Option<char>)

Varchar(Option<String>)

Blob(Option<Box<[u8]>>)

Date(Option<Date>)

Time(Option<Time>)

Timestamp(Option<PrimitiveDateTime>)

TimestampWithTimezone(Option<OffsetDateTime>)

Interval(Option<Interval>)

Uuid(Option<Uuid>)

Array(Option<Box<[Value]>>, Box<Value>, u32)

Fixed-size homogeneous array.

List(Option<Vec<Value>>, Box<Value>)

Variable length homogeneous list.

Map(Option<HashMap<Value, Value>>, Box<Value>, Box<Value>)

Map with homogeneous key/value types.

Struct(Option<Vec<(String, Value)>>, Vec<(String, Value)>)

Struct with named fields and their types.

Unknown(Option<String>)

Parsing fallback / unknown driver-provided type.

Implementations

impl Value

pub fn same_type(&self, other: &Self) -> bool

pub fn is_null(&self) -> bool

pub fn as_null(&self) -> Value

pub fn try_as(self, value: &Value) -> Result<Value>

Trait Implementations

impl Clone for Value

fn clone(&self) -> Value

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for Value

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

Formats the value using the given formatter.

impl Default for Value

fn default() -> Value

Returns the “default value” for a type.

impl Expression for Value

fn write_query( &self, writer: &dyn SqlWriter, context: &mut Context, out: &mut String, )

Serialize the expression into the output string using the dialect writer.

fn is_ordered(&self) -> bool

Whether this expression carries ordering (ASC/DESC) information.

impl From<&'static str> for Value

fn from(value: &'static str) -> Self

Converts to this type from the input type.

impl<T: AsValue> From<T> for Value

fn from(value: T) -> Self

Converts to this type from the input type.

impl Hash for Value

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 OpPrecedence for Value

fn precedence(&self, _writer: &dyn SqlWriter) -> i32

Lower numbers bind weaker; writers parenthesize when child precedence <= operator precedence.

impl PartialEq for Value

fn eq(&self, other: &Self) -> 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 ToTokens for Value

fn to_tokens(&self, tokens: &mut TokenStream)

Write self to the given TokenStream.

fn to_token_stream(&self) -> TokenStream

Convert self directly into a TokenStream object.

fn into_token_stream(self) -> TokenStream

where Self: Sized,

Convert self directly into a TokenStream object.

impl Eq for Value