Trait Decode 

pub trait Decode<'r, DB: Database>: Sized {
    // Required method
    fn decode(
        value: <DB as HasValueRef<'r>>::ValueRef,
    ) -> Result<Self, BoxDynError>;
}

A type that can be decoded from the database.

How can I implement Decode?

A manual implementation of Decode can be useful when adding support for types externally to SQLx.

The following showcases how to implement Decode to be generic over Database. The implementation can be marginally simpler if you remove the DB type parameter and explicitly use the concrete ValueRef and TypeInfo types.

struct MyType;

// DB is the database driver
// `'r` is the lifetime of the `Row` being decoded
impl<'r, DB: Database> Decode<'r, DB> for MyType
where
    // we want to delegate some of the work to string decoding so let's make sure strings
    // are supported by the database
    &'r str: Decode<'r, DB>
{
    fn decode(
        value: <DB as HasValueRef<'r>>::ValueRef,
    ) -> Result<MyType, Box<dyn Error + 'static + Send + Sync>> {
        // the interface of ValueRef is largely unstable at the moment
        // so this is not directly implementable

        // however, you can delegate to a type that matches the format of the type you want
        // to decode (such as a UTF-8 string)

        let value = <&str as Decode<DB>>::decode(value)?;

        // now you can parse this into your type (assuming there is a `FromStr`)

        Ok(value.parse()?)
    }
}

Required Methods

fn decode(value: <DB as HasValueRef<'r>>::ValueRef) -> Result<Self, BoxDynError>

Decode a new value of this type using a raw value from the database.

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementations on Foreign Types

impl Decode<'_, Mssql> for bool

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for f32

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for f64

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for i8

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for i16

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for i32

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for i64

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Mssql> for String

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for bool

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for f32

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for f64

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for i8

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for i16

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for i32

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for i64

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for u8

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for u16

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for u32

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for u64

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for String

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for Vec<u8>

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for BigDecimal

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for Decimal

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for Hyphenated

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, MySql> for Uuid

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for IpNetwork

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for bool

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for f32

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for f64

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for i8

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for i16

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for i32

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for i64

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for String

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for Vec<u8>

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for BigDecimal

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for BitVec

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for MacAddress

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for Decimal

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Postgres> for Uuid

Available on crate feature postgres only.

fn decode(value: PgValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Sqlite> for Hyphenated

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'_>) -> Result<Self, BoxDynError>

impl Decode<'_, Sqlite> for Uuid

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'_>) -> Result<Self, BoxDynError>

impl<'db> Decode<'db, Postgres> for IpAddr

where IpNetwork: Decode<'db, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'db>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for &'r str

where &'r str: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for bool

where bool: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for f32

where f32: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for f64

where f64: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for i16

where i16: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for i32

where i32: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for i64

where i64: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Any> for String

where String: AnyDecode<'r>,

fn decode(value: AnyValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Mssql> for Cow<'r, str>

Available on crate feature mssql only.

fn decode(value: MssqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for &'r str

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for &'r [u8]

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for Cow<'r, str>

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for DateTime<Local>

Available on crate feature mysql only.

Note: assumes the connection’s time_zone is set to +00:00 (UTC).

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for DateTime<Utc>

Available on crate feature mysql only.

Note: assumes the connection’s time_zone is set to +00:00 (UTC).

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for NaiveDate

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for NaiveDateTime

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for NaiveTime

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for Date

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for OffsetDateTime

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for PrimitiveDateTime

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, MySql> for Time

Available on crate feature mysql only.

fn decode(value: MySqlValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for &'r str

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for &'r [u8]

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for Cow<'r, str>

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for ()

Available on crate feature postgres only.

fn decode(_value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for DateTime<FixedOffset>

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for DateTime<Local>

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for DateTime<Utc>

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for NaiveDate

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for NaiveDateTime

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for NaiveTime

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for Date

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for OffsetDateTime

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for PrimitiveDateTime

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Postgres> for Time

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for &'r str

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for &'r [u8]

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for Cow<'r, str>

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for bool

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<bool, BoxDynError>

impl<'r> Decode<'r, Sqlite> for f32

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<f32, BoxDynError>

impl<'r> Decode<'r, Sqlite> for f64

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<f64, BoxDynError>

impl<'r> Decode<'r, Sqlite> for i8

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for i16

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for i32

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for i64

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for u8

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for u16

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for u32

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for String

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for Vec<u8>

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for DateTime<FixedOffset>

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for DateTime<Local>

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for DateTime<Utc>

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for NaiveDate

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for NaiveDateTime

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r> Decode<'r, Sqlite> for NaiveTime

Available on crate feature sqlite only.

fn decode(value: SqliteValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, DB, T> Decode<'r, DB> for Option<T>

where DB: Database, T: Decode<'r, DB>,

fn decode(value: <DB as HasValueRef<'r>>::ValueRef) -> Result<Self, BoxDynError>

impl<'r, T1> Decode<'r, Postgres> for (T1,)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2> Decode<'r, Postgres> for (T1, T2)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3> Decode<'r, Postgres> for (T1, T2, T3)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4> Decode<'r, Postgres> for (T1, T2, T3, T4)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4, T5> Decode<'r, Postgres> for (T1, T2, T3, T4, T5)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T5: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4, T5, T6> Decode<'r, Postgres> for (T1, T2, T3, T4, T5, T6)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T5: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T6: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4, T5, T6, T7> Decode<'r, Postgres> for (T1, T2, T3, T4, T5, T6, T7)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T5: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T6: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T7: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4, T5, T6, T7, T8> Decode<'r, Postgres> for (T1, T2, T3, T4, T5, T6, T7, T8)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T5: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T6: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T7: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T8: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T1, T2, T3, T4, T5, T6, T7, T8, T9> Decode<'r, Postgres> for (T1, T2, T3, T4, T5, T6, T7, T8, T9)

where T1: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T2: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T3: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T4: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T5: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T6: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T7: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T8: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>, T9: 'r + Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

impl<'r, T> Decode<'r, Postgres> for Vec<T>

where T: for<'a> Decode<'a, Postgres> + Type<Postgres>,

Available on crate feature postgres only.

fn decode(value: PgValueRef<'r>) -> Result<Self, BoxDynError>

Implementors

impl Decode<'_, Postgres> for Oid

Available on crate feature postgres only.

impl Decode<'_, Postgres> for PgMoney

Available on crate feature postgres only.

impl<'de> Decode<'de, Postgres> for PgInterval

Available on crate feature postgres only.

impl<'r> Decode<'r, Postgres> for PgLQuery

Available on crate feature postgres only.

impl<'r> Decode<'r, Postgres> for PgLTree

Available on crate feature postgres only.

impl<'r> Decode<'r, Postgres> for PgTimeTz<NaiveTime, FixedOffset>

Available on crate feature postgres only.

impl<'r> Decode<'r, Postgres> for PgTimeTz<Time, UtcOffset>

Available on crate feature postgres only.

impl<'r, DB> Decode<'r, DB> for &'r JsonRawValue

where Json<Self>: Decode<'r, DB>, DB: Database,

Available on crate feature json only.

impl<'r, DB> Decode<'r, DB> for JsonValue

where Json<Self>: Decode<'r, DB>, DB: Database,

Available on crate feature json only.

impl<'r, T> Decode<'r, MySql> for Json<T>

where T: 'r + Deserialize<'r>,

Available on crate feature mysql only.

impl<'r, T> Decode<'r, Postgres> for PgRange<T>

where T: Type<Postgres> + for<'a> Decode<'a, Postgres>,

Available on crate feature postgres only.

impl<'r, T> Decode<'r, Postgres> for Json<T>

where T: Deserialize<'r> + 'r,

Available on crate feature postgres only.

impl<'r, T> Decode<'r, Sqlite> for Json<T>

where T: 'r + Deserialize<'r>,

Available on crate feature sqlite only.