Enum AnyBackend 

#[non_exhaustive]
pub enum AnyBackend {
    MySql,
    Postgres,
    Sqlite,
    Oracle,
    Mssql,
}

数据库后端类型

v2.2.0 新增 Oracle 和 Mssql 变体（需启用 oracle/mssql feature）。 #[non_exhaustive] 标注确保外部 crate match 时必须使用 wildcard 臂， 未来新增变体不会破坏现有代码。

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.

MySql

MySQL / MariaDB

Postgres

PostgreSQL

Sqlite

SQLite

Oracle

Oracle（v2.2.0 新增，需启用 oracle feature）

Mssql

SQL Server / MSSQL（v2.2.0 新增，需启用 mssql feature）

Implementations

impl AnyBackend

pub fn from_dsn(dsn: &str) -> Result<Self, DbError>

从 DSN 自动识别后端类型

支持的 scheme

• mysql:// / mariadb:// → MySQL
• postgres:// / postgresql:// → Postgres
• sqlite:// / sqlite: → Sqlite
• oracle:// → Oracle（v2.2.0 新增）
• mssql:// / sqlserver:// → Mssql（v2.2.0 新增）

pub fn name(&self) -> &'static str

后端名称

pub fn dialect(&self) -> Box<dyn Dialect>

返回对应后端的 Dialect 实例（v2.2.0 新增）

• MySql → MySqlDialect
• Postgres → PostgreSqlDialect
• Sqlite → SqliteDialect
• Oracle → OracleDialect
• Mssql → SqlServerDialect

Trait Implementations

impl Clone for AnyBackend

fn clone(&self) -> AnyBackend

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Copy for AnyBackend

impl Debug for AnyBackend

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

Formats the value using the given formatter.

impl Eq for AnyBackend

impl PartialEq for AnyBackend

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for AnyBackend