Enum JoinOrderError 

pub enum JoinOrderError {
    NoRelations,
    DisconnectedGraph(String),
    TooManyRelations {
        count: usize,
        max: usize,
    },
    InvalidCondition(String),
}

Errors from the join optimizer.

Variants

NoRelations

No relations were provided.

DisconnectedGraph(String)

The join graph is disconnected.

TooManyRelations

Too many relations for the requested strategy.

Fields

count: usize

max: usize

InvalidCondition(String)

A join condition references a relation not in the input set.

Trait Implementations

impl Clone for JoinOrderError

fn clone(&self) -> JoinOrderError

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for JoinOrderError

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

Formats the value using the given formatter.

impl Display for JoinOrderError

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

Formats the value using the given formatter.

impl Error for JoinOrderError

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.