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a0ce421989
- sqlx::mysql::MySqlConnection is a tuple struct of sqlx_mysql::MySqlConnection - sqlx::mysql::MySqlConnection provides both connect() and connect().await using crate-local specialization from negative trait bound inference
33 lines
1.2 KiB
Rust
33 lines
1.2 KiB
Rust
#[cfg(feature = "async")]
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use futures_util::future::BoxFuture;
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use crate::{Close, Connect, Database, Runtime};
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/// A single connection (also known as a session) with a specific database.
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///
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/// With a client/server model, this is equivalent to a network connection
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/// to the server.
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///
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/// SQL statements will be executed and results returned within the context
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/// of this single SQL connection.
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///
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// for<'a> &'a mut Rt::TcpStream: crate::io::Stream<'a>,
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pub trait Connection<Rt>: 'static + Send + Connect<Rt> + Close<Rt>
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where
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Rt: Runtime,
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{
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type Database: Database<Rt, Connection = Self>;
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/// Checks if a connection to the database is still valid.
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///
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/// The method of operation greatly depends on the database driver. In MySQL, there is an
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/// explicit [`COM_PING`](https://dev.mysql.com/doc/internals/en/com-ping.html) command. In
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/// PostgreSQL, `ping` will issue a query consisting of a comment `/* SQLx ping */` which,
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/// in effect, does nothing apart from getting a response from the server.
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///
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#[cfg(feature = "async")]
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fn ping(&mut self) -> BoxFuture<'_, crate::Result<()>>
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where
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Rt: crate::Async;
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}
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