Enum MdbError 

pub enum MdbError {
    KeyExist,
    NotFound,
    PageNotFound,
    Corrupted,
    Panic,
    VersionMismatch,
    Invalid,
    MapFull,
    DbsFull,
    ReadersFull,
    TlsFull,
    TxnFull,
    CursorFull,
    PageFull,
    MapResized,
    Incompatible,
    BadRslot,
    BadTxn,
    BadValSize,
    BadDbi,
    Problem,
    Other(c_int),
}

An LMDB error kind.

Variants

KeyExist

A key/data pair already exists.

May be also returned by append functions. Data passed doesn’t respect the database ordering.

NotFound

A key/data pair was not found (EOF).

PageNotFound

Requested page not found - this usually indicates corruption.

Corrupted

Located page was wrong type.

Panic

Update of meta page failed or environment had fatal error.

VersionMismatch

Environment version mismatch.

Invalid

File is not a valid LMDB file.

MapFull

Environment mapsize reached.

DbsFull

Environment maxdbs reached.

ReadersFull

Environment maxreaders reached.

TlsFull

Too many TLS keys in use - Windows only.

TxnFull

Txn has too many dirty pages.

CursorFull

Cursor stack too deep - internal error.

PageFull

Page has not enough space - internal error.

MapResized

Database contents grew beyond environment mapsize.

Incompatible

Operation and DB incompatible, or DB type changed. This can mean:

• The operation expects an MDB_DUPSORT / MDB_DUPFIXED database.
• Opening a named DB when the unnamed DB has MDB_DUPSORT / MDB_INTEGERKEY.
• Accessing a data record as a database, or vice versa.
• The database was dropped and recreated with different flags.

BadRslot

Invalid reuse of reader locktable slot.

BadTxn

Transaction cannot recover - it must be aborted.

BadValSize

Unsupported size of key/DB name/data, or wrong DUP_FIXED size.

Common causes of this error:

• You tried to store a zero-length key
• You tried to store a key longer than the max allowed key (511 bytes by default)
• You are using DUP_SORT and trying to store a value longer than the max allowed key size (511 bytes by default)

In the last two cases you can enable the longer-keys feature to increase the max allowed key size.

BadDbi

The specified DBI was changed unexpectedly.

Problem

Unexpected problem - transaction should abort.

Other(c_int)

Other error.

Implementations

impl Error

pub fn not_found(&self) -> bool

Returns true if the given error is Error::NotFound.

pub fn from_err_code(err_code: c_int) -> Error

Converts a raw error code to an Error.

pub fn to_err_code(&self) -> c_int

Converts an Error to the raw error code.

Trait Implementations

impl Clone for Error

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for Error

impl Debug for Error

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

Formats the value using the given formatter.

impl Display for Error

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

Formats the value using the given formatter.

impl Eq for Error

impl Error for Error

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<Error> for Error

fn from(error: MdbError) -> Error

Converts to this type from the input type.

impl PartialEq for Error

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for Error