Enum MsgKind 

#[non_exhaustive]
#[repr(u8)]
pub enum MsgKind {
    QueryRequest = 16,
    ResultBatch = 17,
    ResultEnd = 18,
    QueryError = 19,
    Cancel = 20,
    Credit = 21,
    ExecDone = 22,
    CacheReset = 23,
    ServerInfo = 24,
}

Message kind code (uint8). repr(u8) keeps wire transcoding trivial.

#[non_exhaustive] because the QWP message-kind table is append-only across protocol revisions.

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.

QueryRequest = 16

Client → Server: initiate cursor with SQL + binds.

ResultBatch = 17

Server → Client: one table block of results.

ResultEnd = 18

Server → Client: successful stream termination.

QueryError = 19

Server → Client: failure at any lifecycle point.

Cancel = 20

Client → Server: request query termination.

Credit = 21

Client → Server: extend byte-credit window.

ExecDone = 22

Server → Client: non-SELECT acknowledgement.

CacheReset = 23

Server → Client: clear connection caches.

ServerInfo = 24

Server → Client: role + cluster identity.

Implementations

impl MsgKind

pub fn from_u8(byte: u8) -> Result<Self>

Parse a wire byte into a known kind.

pub fn as_u8(self) -> u8

Wire byte for this kind.

Trait Implementations

impl Clone for MsgKind

fn clone(&self) -> MsgKind

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for MsgKind

impl Debug for MsgKind

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

Formats the value using the given formatter.

impl Eq for MsgKind

impl Hash for MsgKind

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for MsgKind

fn eq(&self, other: &MsgKind) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for MsgKind