Enum OptimizationError 

pub enum OptimizationError {
    NoPlanGenerated,
    CostEstimationFailed(String),
    StatisticsError(String),
    InvalidQuery(String),
}

Errors that can occur during optimization

Variants

NoPlanGenerated

No plan could be generated

CostEstimationFailed(String)

Cost estimation failed

StatisticsError(String)

Statistics error

InvalidQuery(String)

Invalid query

Trait Implementations

impl Debug for OptimizationError

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

Formats the value using the given formatter.

impl Display for OptimizationError

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

Formats the value using the given formatter.

impl Error for OptimizationError

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.