网站建设销售需要懂的知识/如何利用互联网宣传与推广

引入crate：

postgres = "0.19.7"

use postgres::{Client, NoTls, error::Error};fn main() -> Result<(), Error> {let mut client = Client::connect("host=localhost port=5432 dbname=xxxxdb user=postgres password=xxxxxx", NoTls).unwrap();for row in client.query("select * from xxxx", &[])?{let id: i32 = row.get(0);let name: &str = row.get(1);let file_name: &str = row.get(2);//let create_time: std::time = row.get(3);let valid: bool = row.get(4);println!("id:{}, name:{}, file_name:{}, valid:{}", id, name, file_name, valid);}Ok(())
}

注意：用户名不要使用root。否则报错：

thread 'main' panicked at src\main.rs:5:115:
called `Result::unwrap()` on an `Err` value: Error { kind: Parse, cause: Some(Custom { kind: InvalidInput, error: Utf8Error { valid_up_to: 0, error_len: Some(1) } }) }