Enum FrontendMessage 

pub enum FrontendMessage {
    Startup(StartupParams),
    SslRequest,
    GssEncRequest,
    Query(String),
    Parse(ParseMessage),
    Bind(BindMessage),
    Describe(DescribeMessage),
    Execute(ExecuteMessage),
    Close(CloseMessage),
    PasswordMessage(Vec<u8>),
    Terminate,
    Flush,
    Sync,
    Unknown {
        tag: u8,
        payload: Vec<u8>,
    },
}

Frontend (client → server) messages we parse.

Variants

Startup(StartupParams)

Pre-handshake StartupMessage payload (parameters map).

SslRequest

SSL handshake request — we reject with ‘N’ (not supported).

GssEncRequest

GSSAPI encryption request — we reject with ‘N’.

Query(String)

Q — simple query.

Parse(ParseMessage)

P — Parse: name a prepared statement and its SQL text.

Bind(BindMessage)

B — Bind: attach concrete parameter bytes to a named statement.

Describe(DescribeMessage)

D — Describe a prepared statement or portal.

Execute(ExecuteMessage)

E — Execute a bound portal.

Close(CloseMessage)

C — Close a prepared statement or portal.

PasswordMessage(Vec<u8>)

p — password / SASL response. Payload is ignored for trust auth.

Terminate

X — Terminate.

Flush

H — Flush. Send buffered results.

Sync

S — Sync. End of extended query batch.

Unknown

Any other frame we don’t implement yet; carries the raw tag for logging / ErrorResponse reply.

Fields

tag: u8

payload: Vec<u8>

Trait Implementations

impl Clone for FrontendMessage

fn clone(&self) -> FrontendMessage

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for FrontendMessage

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

Formats the value using the given formatter.