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<Cow<'static, str>>),
    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>),
    Json(Option<Value>),
    Struct(Option<Vec<(String, Value)>>, Vec<(String, Value)>, TableRef),
    Unknown(Option<String>),
}

SQL value representation used across Tank.

Variants hold Option<T> to store the actual value (None means SQL NULL) and additional needed type information.

Variants

Null

Untyped 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)

Decimal with width and scale information.

Char(Option<char>)

Varchar(Option<Cow<'static, str>>)

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.

Json(Option<Value>)

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

Struct with named fields and types.

Unknown(Option<String>)

Unknown value type (usually the driver cannot provide type information).

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 AsValue for Value

fn as_empty_value() -> Value

Return a NULL equivalent variant for this type.

fn as_value(self) -> Value

Convert into owned Value.

fn try_from_value(value: Value) -> Result<Self>

where Self: Sized,

Try to convert a dynamic Value into Self.

fn parse(input: impl AsRef<str>) -> Result<Self>

where Self: Sized,

Parse a full string into Self.

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 DynQuery, )

Serialize the expression into out using writer.

fn is_ordered(&self) -> bool

True if it encodes ordering.

fn is_true(&self) -> bool

True if it is an expression that simply evaluates to true

impl From<&'static str> for Value

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

Converts to this type from the input type.

impl From<Value> for DefaultValueType

fn from(value: Value) -> 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