diesel::backend

Trait Backend

Source 
pub trait Backend
where
    Self: Sized + HasSqlType<SmallInt> + HasSqlType<Integer> + HasSqlType<BigInt> + HasSqlType<Float> + HasSqlType<Double> + HasSqlType<VarChar> + HasSqlType<Text> + HasSqlType<Binary> + HasSqlType<Date> + HasSqlType<Time> + HasSqlType<Timestamp>,
{
    type QueryBuilder: QueryBuilder<Self>;
    type BindCollector: BindCollector<Self>;
    type RawValue: ?Sized;
    type ByteOrder: ByteOrder;
}
Expand description

A database backend

This trait represents the concept of a backend (e.g. “MySQL” vs “SQLite”). It is separate from a Connection to that backend. One backend may have multiple concrete connection implementations.

Implementations of this trait should not assume details about how the connection is implemented. For example, the Pg backend does not assume that libpq is being used. Implementations of this trait can and should care about details of the wire protocol used to communicated with the database.

Required Associated Types§

Source

type QueryBuilder: QueryBuilder<Self>

The concrete QueryBuilder implementation for this backend.

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type BindCollector: BindCollector<Self>

The concrete BindCollector implementation for this backend.

Most backends should use RawBytesBindCollector.

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type RawValue: ?Sized

The raw representation of a database value given to FromSql.

Since most backends transmit data as opaque blobs of bytes, this type is usually [u8].

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type ByteOrder: ByteOrder

What byte order is used to transmit integers?

This type is only used if RawValue is [u8].

Dyn Compatibility§

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety", so this trait is not object safe.

Implementors§