Enum ErrorClass 

pub enum ErrorClass {
    ConstraintViolation,
    Contention,
    Timeout,
    Connection,
    Compile,
    Other,
}

A coarse bucket for a failed query, for use as a metric label.

Deliberately coarse: an unbounded label (a raw error message, a SQLSTATE, a constraint name) is exactly the thing that blows up a metrics backend’s cardinality. Anything finer belongs on a span or in a log line.

Variants

ConstraintViolation

A constraint the write violated — unique, foreign key, check, not-null.

Contention

Serialization failure or deadlock: the caller can retry.

Timeout

Statement or lock timeout.

Connection

Couldn’t reach or stay connected to the database.

Compile

The query never reached the database — bad PyQL, unknown type/pointer.

Other

Implementations

impl ErrorClass

pub fn as_label(self) -> &'static str

The label value. &'static str so it can’t accidentally become unbounded.

pub fn from_sqlstate(code: &str) -> Self

Buckets a SQLSTATE by its two-character class, which is how the standard already groups them — so a code this was never written against still lands somewhere sensible instead of in Other.

Trait Implementations

impl Clone for ErrorClass

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorClass

impl Debug for ErrorClass

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

Formats the value using the given formatter.

impl Eq for ErrorClass

impl PartialEq for ErrorClass

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorClass