Database abstraction layer for D programing language, support PostgreSQL / MySQL.
import std.stdio; import hunt.database; void main() { writeln("run database MySQL demo."); auto db = new Database("mysql://root:123456@localhost:3306/test?charset=utf8mb4"); int result = db.execute(`INSERT INTO user(username) VALUES("test")`); writeln(result); foreach(row; db.query("SELECT * FROM user LIMIT 10")) { writeln(row["username"]); } db.close(); } auto options = new DatabaseOption("mysql://root:123456@localhost:3306/test"); options.setMaximumConnection(5); auto db = new Database(options); db.execute("SET NAMES utf8");- int Database.execute(string sql) Return number of execute result.
int result = db.execute('INSERT INTO user(username) VALUES("Brian")'); // if execute error ,db will throw an DatabaseException- RowSet Database.query(sql) Return RowSet object for query(SELECT).
RowSet rs = db.query("SELECT * FROM user LIMIT 10");- Statement Database.prepare(sql) Create a prepared Statement object.
Statement stmt = db.prepare("SELECT * FROM user where username = :username and age = :age LIMIT 10");- Statement.setParameter(param, value) : bind param's value to :param for sql.
stmt.setParameter("username", "viile"); stmt.setParameter("age", 18);- RowSet Statement.query() Return RowSet
RowSet rs = stmt.query(); foreach(row; rs) { writeln(row["username"]); }- Row Statement.fetch() Return Row
Row row = stmt.fetch(); writeln(row["username"]);- int Statement.execute() : return execute status for prepared Statement object.
int result = stmt.execute();- Statement.lastInsertId() : Statement.execute() for insert sql, return lastInsertId.