Enum BackendMessage 

pub enum BackendMessage {
    AuthenticationOk,
    ParameterStatus {
        name: String,
        value: String,
    },
    BackendKeyData {
        pid: u32,
        key: u32,
    },
    ReadyForQuery(TransactionStatus),
    RowDescription(Vec<ColumnDescriptor>),
    DataRow(Vec<Option<Vec<u8>>>),
    CommandComplete(String),
    ParseComplete,
    BindComplete,
    CloseComplete,
    ParameterDescription(Vec<u32>),
    NoData,
    ErrorResponse {
        severity: String,
        code: String,
        message: String,
    },
    NoticeResponse {
        message: String,
    },
    EmptyQueryResponse,
}

Backend (server → client) messages we emit.

Variants

AuthenticationOk

R — AuthenticationOk (subtype 0).

ParameterStatus

S — ParameterStatus (server_version, client_encoding, …).

Fields

name: String

value: String

BackendKeyData

K — BackendKeyData (cancel key).

Fields

pid: u32

key: u32

ReadyForQuery(TransactionStatus)

Z — ReadyForQuery. Status: ‘I’ idle, ‘T’ in-txn, ‘E’ failed-txn.

RowDescription(Vec<ColumnDescriptor>)

T — RowDescription.

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

D — DataRow. Each field is Some(bytes) or None (NULL).

CommandComplete(String)

C — CommandComplete (e.g. “SELECT 3”, “INSERT 0 1”).

ParseComplete

1 — ParseComplete.

BindComplete

2 — BindComplete.

CloseComplete

3 — CloseComplete.

ParameterDescription(Vec<u32>)

t — ParameterDescription.

NoData

n — NoData.

ErrorResponse

E — ErrorResponse with severity + code + message.

Fields

severity: String

code: String

message: String

NoticeResponse

N — NoticeResponse (non-fatal).

Fields

message: String

EmptyQueryResponse

I — EmptyQueryResponse.

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.