Trait sqlx::Value

pub trait Value {
    type Database: Database;
    fn as_ref(&self) -> <Self::Database as HasValueRef<'_>>::ValueRef;
    fn type_info(&self) -> Cow<'_, <Self::Database as Database>::TypeInfo>;
    fn is_null(&self) -> bool;

    fn decode<'r, T>(&'r self) -> T
    where
        T: Decode<'r, Self::Database> + Type<Self::Database>,
    { ... }
    fn decode_unchecked<'r, T>(&'r self) -> T
    where
        T: Decode<'r, Self::Database>,
    { ... }
    fn try_decode<'r, T>(&'r self) -> Result<T, Error>
    where
        T: Decode<'r, Self::Database> + Type<Self::Database>,
    { ... }
    fn try_decode_unchecked<'r, T>(&'r self) -> Result<T, Error>
    where
        T: Decode<'r, Self::Database>,
    { ... }
}

An owned value from the database.

Associated Types

type Database: Database

Required methods

fn as_ref(&self) -> <Self::Database as HasValueRef<'_>>::ValueRef

Get this value as a reference.

fn type_info(&self) -> Cow<'_, <Self::Database as Database>::TypeInfo>

Get the type information for this value.

fn is_null(&self) -> bool

Returns true if the SQL value is NULL.

Provided methods

fn decode<'r, T>(&'r self) -> T where
    T: Decode<'r, Self::Database> + Type<Self::Database>, 

Decode this single value into the requested type.

Panics

Panics if the value cannot be decoded into the requested type. See try_decode for a non-panicking version.

fn decode_unchecked<'r, T>(&'r self) -> T where
    T: Decode<'r, Self::Database>, 

Decode this single value into the requested type.

Unlike decode, this method does not check that the type of this value is compatible with the Rust type and blindly tries to decode the value.

Panics

Panics if the value cannot be decoded into the requested type. See try_decode_unchecked for a non-panicking version.

fn try_decode<'r, T>(&'r self) -> Result<T, Error> where
    T: Decode<'r, Self::Database> + Type<Self::Database>, 

Decode this single value into the requested type.

Errors

• Decode if the value could not be decoded into the requested type.

fn try_decode_unchecked<'r, T>(&'r self) -> Result<T, Error> where
    T: Decode<'r, Self::Database>, 

Decode this single value into the requested type.

Unlike try_decode, this method does not check that the type of this value is compatible with the Rust type and blindly tries to decode the value.

Errors

• Decode if the value could not be decoded into the requested type.

Implementors

impl Value for AnyValue

type Database = Any

pub fn as_ref(
    &self
) -> <<AnyValue as Value>::Database as HasValueRef<'_>>::ValueRef

pub fn type_info(&self) -> Cow<'_, AnyTypeInfo>

pub fn is_null(&self) -> bool

impl Value for MssqlValue

type Database = Mssql

pub fn as_ref(&self) -> MssqlValueRef<'_>

pub fn type_info(&self) -> Cow<'_, MssqlTypeInfo>

pub fn is_null(&self) -> bool

impl Value for MySqlValue

type Database = MySql

pub fn as_ref(&self) -> MySqlValueRef<'_>

pub fn type_info(&self) -> Cow<'_, MySqlTypeInfo>

pub fn is_null(&self) -> bool

impl Value for PgValue

type Database = Postgres

pub fn as_ref(&self) -> PgValueRef<'_>

pub fn type_info(&self) -> Cow<'_, PgTypeInfo>

pub fn is_null(&self) -> bool

impl Value for SqliteValue

type Database = Sqlite

pub fn as_ref(&self) -> SqliteValueRef<'_>

pub fn type_info(&self) -> Cow<'_, SqliteTypeInfo>

pub fn is_null(&self) -> bool