Database
Database abstraction layer for D programing language, support PostgreSQL / MySQL.
Example
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();
}
Use DatabaseOption to instantiate a Database object
auto options = new DatabaseOption("mysql://root:123456@localhost:3306/test");
options.setMaximumConnection(5);
auto db = new Database(options);
db.execute("SET NAMES utf8");API
- 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.