Enum Error 

#[non_exhaustive]
pub enum Error {
    Server(Box<DbError>),
    Protocol(Error),
    Io(Error),
    Tls(Error),
    Config(String),
    Closed,
    ConnectionFailed(String),
    PoolTimedOut,
    PoolClosed,
    RowNotFound,
    ColumnNotFound(String),
    UnexpectedNull(String),
    Decode(String),
    Encode(String),
    Time(Error),
    Uuid(Error),
    Json(Error),
    IpNetwork(IpNetworkError),
    Utf8(Utf8Error),
}

The error type returned by every fallible operation in this crate.

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.

Server(Box<DbError>)

A server-reported error (ErrorResponse).

Boxed to keep every Result<T, Error> small: [DbError] is ~250 bytes.

Protocol(Error)

A wire-protocol, decode, encode or authentication error.

Io(Error)

An I/O error on the connection.

Tls(Error)

A TLS error.

Config(String)

The connection string is invalid or unsupported.

Closed

The connection or pool has been closed.

ConnectionFailed(String)

The connection failed while a result was still streaming.

The message describes the underlying cause (protocol error, I/O failure, …).

PoolTimedOut

Acquiring a pooled connection timed out.

PoolClosed

The connection pool has been closed.

RowNotFound

A query expected exactly one row but found none.

ColumnNotFound(String)

A column name was not present in the result set.

UnexpectedNull(String)

A NULL was found where a non-nullable value was expected.

Decode(String)

A value could not be decoded.

Encode(String)

A value could not be encoded.

Time(Error)

A value was not a valid time date/time.

Uuid(Error)

A value was not a valid UUID.

Json(Error)

A value was not valid JSON.

IpNetwork(IpNetworkError)

A value was not a valid IP network.

Utf8(Utf8Error)

A string was not valid UTF-8.

Trait Implementations

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Error for Error

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<DbError> for Error

fn from(err: DbError) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(source: Error) -> Self

Converts to this type from the input type.

impl From<Error> for Error

fn from(err: ProtocolError) -> Self

Converts to this type from the input type.

impl From<IpNetworkError> for Error

fn from(source: IpNetworkError) -> Self

Converts to this type from the input type.

impl From<Utf8Error> for Error

fn from(source: Utf8Error) -> Self

Converts to this type from the input type.