Rust Postgres介绍
Rust Postgres是一个纯Rust实现的PostgreSQL客户端库，无需依赖任何外部二进制文件2。这意味着它可以轻松集成到你的Rust项目中，提供对PostgreSQL的支持。
特点
- 高性能：Rust Postgres提供了高性能的数据库交互功能，这对于需要处理大量数据的应用来说是非常重要的。
- 安全性：由于Rust本身的设计就注重安全性，因此Rust Postgres也继承了这一特性，能够在编译期间检测并预防大部分潜在的安全问题。
- 易用性：Rust Postgres的API设计简洁明了，易于理解和使用，这使得开发者能够快速上手并开始使用。
目录结构
cargo.toml配置文件
[package]
name = "MyPostgres"
version = "0.1.0"
edition = "2021"[dependencies]
postgres = "0.19.7"[[example]]
name = "createPostgresDatabase"
path = "examples/SQL/createPostgresDatabase.rs"
doc-scrape-examples = true[package.metadata.example.createPostgresDatabase]
name = "Create Postgres Database"
description = "demonstrates postgreSQL database create"
category = "SQL Rendering"
wasm = true假设已有数据库library,初始数据库，可在官方下载软件，按照过程设置密码，本实例中是123456。
postgreSQL不允许管理员登录命令行，可以在路径.\PostgreSQL\16\pgAdmin 4\runtime找到pgAdmin4.exe打开可视化界面。
PostgreSQL: Windows installers
执行文件createPostgresDatabase.rs
增删改查
use postgres::{Client, NoTls, Error};
use std::collections::HashMap;
use std::rc::Rc;
use std::cell::RefCell;
struct Author {_id: i32,name: String,country: String
}struct Nation {nationality: String,count: i64,
}
fn establish_client() -> Client {Client::connect("postgresql://postgres:123456@localhost/library", NoTls).expect("REASON")}
fn main() -> Result<(), Error> {// let mut client =// Client::connect("postgresql://postgres:123456@localhost/library", NoTls)?;let client =Rc::new(RefCell::new(establish_client()));client.clone().borrow_mut().batch_execute("CREATE TABLE IF NOT EXISTS author (id SERIAL PRIMARY KEY,name VARCHAR NOT NULL,country VARCHAR NOT NULL)")?;client.clone().borrow_mut().batch_execute("CREATE TABLE IF NOT EXISTS book (id SERIAL PRIMARY KEY,title VARCHAR NOT NULL,author_id INTEGER NOT NULL REFERENCES author)")?;let mut authors = HashMap::new();authors.insert(String::from("Chinua Achebe"), "Nigeria");authors.insert(String::from("Rabindranath Tagore"), "India");authors.insert(String::from("Anita Nair"), "India");for (key, value) in &authors {let author = Author {_id: 0,name: key.to_string(),country: value.to_string()};client.clone().borrow_mut().execute("INSERT INTO author (name, country) VALUES ($1, $2)",&[&author.name, &author.country],)?;}for row in client.clone().borrow_mut().query("SELECT id, name, country FROM author", &[])? {let author = Author {_id: row.get(0),name: row.get(1),country: row.get(2),};println!("Author {} is from {}", author.name, author.country);}client.clone().borrow_mut().execute("DROP TABLE book",&[]);// let result =// client.clone().borrow_mut().execute// ("DELETE FROM author WHERE id >= $1 AND id <= $2", &[&1i32, &100i32])?;//// println!("{:?}",result);let a2 = Author {_id: 0,name: "YinThunder".to_string(),country: "1".to_string()};let result =client.clone().borrow_mut().execute("UPDATE author SET name = $1 WHERE id >= $2 AND id <= $3", &[&a2.name,&1i32, &100i32])?;println!("{:?}",result);selectDataTable(client.clone());droptDataTable(client.clone());Ok(())}
fn selectDataTable(client: Rc<RefCell<Client>>) ->Result<(), Error>{for row in client.borrow_mut().query("SELECT id, name, country FROM author", &[])? {let author = Author {_id: row.get(0),name: row.get(1),country: row.get(2),};println!("Author {} is from {}", author.name, author.country);}Ok(())
}
fn droptDataTable(client: Rc<RefCell<Client>>) ->Result<(), Error>{client.borrow_mut().execute("DROP TABLE author",&[]);Ok(())
}命令行执行指令
cargo run --example createPostgresDatabase
