Enum QueryError 

pub enum QueryError {
    Storage(StorageError),
    Engine(LmpgError),
    InvalidPredicate(String),
    Cancelled,
    ResourceLimit(String),
    UnindexedWalk(String),
}

Errors returned by query planning and execution.

Variants

Storage(StorageError)

A storage read or snapshot error.

Engine(LmpgError)

An engine (LMPG) error.

InvalidPredicate(String)

A predicate could not be evaluated (e.g. divide by zero, unresolved ref).

Cancelled

The cooperative cancellation probe requested a stop.

ResourceLimit(String)

A declared resource budget (e.g. distinct aggregate buckets) was exceeded.

UnindexedWalk(String)

A filter without a usable index would check more records than unindexed-walk-max-owners allows.

Trait Implementations

impl Debug for QueryError

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

Formats the value using the given formatter.

impl Display for QueryError

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

Formats the value using the given formatter.

impl Error for QueryError

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 From<LmpgError> for QueryError

fn from(source: LmpgError) -> Self

Converts to this type from the input type.

impl From<StorageError> for QueryError

fn from(source: StorageError) -> Self

Converts to this type from the input type.