Rust: PostgreSQL のデータを更新 (Update)
5425 ワード
Cargo.toml
[package]
name = "postgres_update"
version = "0.1.0"
edition = "2018"
[dependencies]
postgres = "*"
chrono = "0.4"
src/main.rs
// --------------------------------------------------------------------
/*
postgres_update/src/main.rs
Jul/24/2020
*/
// --------------------------------------------------------------------
use std::env;
use postgres::{Client, NoTls, Error};
use chrono::{Local, Date};
// --------------------------------------------------------------------
fn main() -> Result<(), Error> {
eprintln!("*** start ***");
let args: Vec<_> = env::args().collect();
let key_in = &args[1];
let population_in = &args[2];
eprintln!("{}",key_in);
eprintln!("{}",population_in);
let mut client = Client::connect("postgresql://scott:tiger123@localhost/city", NoTls)?;
let date_mod: Date<Local> = Local::today();
println!("{}", date_mod);
let sql_str = "update cities set population = ".to_owned()
+ population_in + &", date_mod = '".to_owned()
+ &date_mod.to_string()
+ &"' where id = '".to_owned() + key_in + "'";
client.batch_execute(&sql_str)?;
eprintln!("*** end ***");
Ok(())
}
// --------------------------------------------------------------------
実行コマンド
cargo run t3462 7621300
Author And Source
この問題について(Rust: PostgreSQL のデータを更新 (Update)), 我々は、より多くの情報をここで見つけました https://qiita.com/ekzemplaro/items/552f71441a68ce947c2d著者帰属:元の著者の情報は、元のURLに含まれています。著作権は原作者に属する。
Content is automatically searched and collected through network algorithms . If there is a violation . Please contact us . We will adjust (correct author information ,or delete content ) as soon as possible .