Enum UpgradeError 

#[non_exhaustive]
pub enum UpgradeError {
    PersistentSavepointExists,
    EphemeralSavepointExists,
    TransactionInProgress,
    Storage(StorageError),
}

Errors related to database upgrades

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

PersistentSavepointExists

A persistent savepoint exists

EphemeralSavepointExists

A ephemeral savepoint exists

TransactionInProgress

A transaction is still in-progress

Storage(StorageError)

Error from underlying storage

Trait Implementations

impl Debug for UpgradeError

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

Formats the value using the given formatter.

impl Display for UpgradeError

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

Formats the value using the given formatter.

impl Error for UpgradeError

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<CommitError> for UpgradeError

fn from(err: CommitError) -> UpgradeError

Converts to this type from the input type.

impl From<StorageError> for UpgradeError

fn from(err: StorageError) -> UpgradeError

Converts to this type from the input type.

impl From<UpgradeError> for Error

fn from(err: UpgradeError) -> Error

Converts to this type from the input type.

Layout

Note: Most layout information is completely unstable and may even differ between compilations. The only exception is types with certain repr(...) attributes. Please see the Rust Reference's “Type Layout” chapter for details on type layout guarantees.

Size: 24 bytes

Size for each variant:

• PersistentSavepointExists: 0 bytes
• EphemeralSavepointExists: 0 bytes
• TransactionInProgress: 0 bytes
• Storage: 24 bytes