Enum ErrorCategory 

pub enum ErrorCategory {
    Io,
    Serialization,
    Corruption,
    Schema,
    Parsing,
    Storage,
    Concurrency,
    Constraints,
    Query,
    Cancelled,
    Other,
}

Bounded, telemetry-safe error categories. The total count is small and fixed, making as_str() values safe as metric/span attribute values.

Variants

Io

Filesystem / OS I/O, paths, timeouts.

Serialization

(De)serialization and type-conversion failures.

Corruption

On-disk data corruption / checksum failures.

Schema

Schema / catalog problems.

Parsing

Binary-format / CQL text parsing failures.

Storage

Storage-engine, memory, index, compaction, locking.

Concurrency

Concurrency / transaction failures.

Constraints

Constraint violations and conflicts.

Query

Query execution / unsupported queries / bad input.

Cancelled

A cooperative cancellation / abort (issue #2264). Kept distinct from Other (and never Io) so dashboards can see cancellation rate separately from genuine errors — a cancelled do_get is an expected outcome, not a fault.

Other

Everything else (configuration, internal, platform, catch-all).

Implementations

impl ErrorCategory

pub const ALL: &'static [ErrorCategory]

All variants, for tests and exhaustiveness checks.

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

Stable, low-cardinality label. Safe to use as a metric/span attribute value — these strings never change for a given variant.

Trait Implementations

impl Clone for ErrorCategory

fn clone(&self) -> ErrorCategory

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for ErrorCategory

impl Debug for ErrorCategory

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

Formats the value using the given formatter.

impl Display for ErrorCategory

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

Formats the value using the given formatter.

impl Eq for ErrorCategory

impl Hash for ErrorCategory

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 ErrorCategory

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for ErrorCategory