Enum DbError 

pub enum DbError {
    Sql(String),
    UniqueViolation,
    TypeMismatch {
        col: usize,
        expected: &'static str,
    },
    IntegerOutOfRange(i128),
    ColumnOutOfBounds(usize),
    UnexpectedNull(usize),
}

An error from a SQL backend operation.

Variants

Sql(String)

A backend error with no more specific variant; carries the backend’s own message.

UniqueViolation

A UNIQUE / PRIMARY KEY conflict. A tracker that keys the op-log on (peer_id, entry_idx) surfaces a re-ingested entry as this — failing the batch so the whole apply rolls back rather than double-applying, not a silent skip. Each backend must map its native constraint error to this variant.

TypeMismatch

A column held a value of a different type than the caller requested.

Fields

col: usize

Column index that was read.

expected: &'static str

The Rust type the caller asked for.

IntegerOutOfRange(i128)

A u64 (e.g. a packed HLC timestamp) didn’t fit the signed 64-bit integer a SQL backend stores. On a write the value exceeded i64::MAX; on a read the stored value was negative. Either way it can’t round-trip through a signed column — and the signed MAX/GREATEST merge guard would misorder it — so we reject rather than silently wrap. The i128 holds the offending value losslessly in both directions.

ColumnOutOfBounds(usize)

A column index past the end of the row was requested.

UnexpectedNull(usize)

A column was SQL NULL where the caller required a non-null value.

Trait Implementations

impl Debug for DbError

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

Formats the value using the given formatter.

impl Display for DbError

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

Formats the value using the given formatter.

impl Error for DbError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl<E> From<DbError> for ProcessorError<E>

fn from(source: DbError) -> Self

Converts to this type from the input type.

impl From<DbError> for LogTrackerError

fn from(source: DbError) -> Self

Converts to this type from the input type.