sqlx-xugu 0.8.6

use crate::protocol::encode_command0;
use sqlx_core::io::ProtocolEncode;
use sqlx_core::Error;

#[derive(Debug)]
pub(crate) struct Ping;

impl ProtocolEncode<'_, ()> for Ping {
    fn encode_with(&self, buf: &mut Vec<u8>, _: ()) -> Result<(), Error> {
        // 选择 PL/SQL 语句是因为 null 语句对服务器无影响，且命令执行结果接收字节少
        const SQL_CMD: &str = "begin/* SQLx ping */null;end";
        encode_command0(buf, SQL_CMD);
        Ok(())
    }
}