Enum BackendMessage 

pub enum BackendMessage {
    AuthenticationOk,
    AuthenticationMD5Password([u8; 4]),
    AuthenticationSASL(Vec<String>),
    AuthenticationSASLContinue(Vec<u8>),
    AuthenticationSASLFinal(Vec<u8>),
    ParameterStatus {
        name: String,
        value: String,
    },
    BackendKeyData {
        process_id: i32,
        secret_key: i32,
    },
    ReadyForQuery(TransactionStatus),
    RowDescription(Vec<FieldDescription>),
    DataRow(Vec<Option<Vec<u8>>>),
    CommandComplete(String),
    ErrorResponse(ErrorFields),
    ParseComplete,
    BindComplete,
    NoData,
    CopyInResponse {
        format: u8,
        column_formats: Vec<u8>,
    },
    CopyOutResponse {
        format: u8,
        column_formats: Vec<u8>,
    },
    CopyData(Vec<u8>),
    CopyDone,
    NotificationResponse {
        process_id: i32,
        channel: String,
        payload: String,
    },
    EmptyQueryResponse,
    NoticeResponse(ErrorFields),
}

Backend (server → client) message types

Variants

AuthenticationOk

Authentication request

AuthenticationMD5Password([u8; 4])

AuthenticationSASL(Vec<String>)

AuthenticationSASLContinue(Vec<u8>)

AuthenticationSASLFinal(Vec<u8>)

ParameterStatus

Parameter status (server config)

Fields

name: String

value: String

BackendKeyData

Backend key data (for cancel)

Fields

process_id: i32

secret_key: i32

ReadyForQuery(TransactionStatus)

RowDescription(Vec<FieldDescription>)

DataRow(Vec<Option<Vec<u8>>>)

CommandComplete(String)

ErrorResponse(ErrorFields)

ParseComplete

BindComplete

NoData

CopyInResponse

Copy in response (server ready to receive COPY data)

Fields

format: u8

column_formats: Vec<u8>

CopyOutResponse

Copy out response (server will send COPY data)

Fields

format: u8

column_formats: Vec<u8>

CopyData(Vec<u8>)

CopyDone

NotificationResponse

Notification response (async notification from LISTEN/NOTIFY)

Fields

process_id: i32

channel: String

payload: String

EmptyQueryResponse

NoticeResponse(ErrorFields)

Notice response (warning/info messages, not errors)

Implementations

impl BackendMessage

pub fn decode(buf: &[u8]) -> Result<(Self, usize), String>

Decode a message from wire bytes.

Trait Implementations

impl Clone for BackendMessage

fn clone(&self) -> BackendMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for BackendMessage

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

Formats the value using the given formatter.