Dbal 示例代码 介绍
Dbal 是 HuntLabs 开发的D语言（dlang）数据库驱动层，类似 PHP 的
PDO、JAVA 的 JDBC，内置连接池支持。
目前支持的数据库驱动：
-
PostgreSQL 8+
-
MySQL 5.1+
-
SQLite 3+
示例代码
import std.stdio;
import std.experimental.logger;
import database;
void main()
{
writeln("run database MySQL demo.");
auto db = new Database("mysql://root:123456@localhost:3306/test?charset=utf-8");
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 -
ResultSet Database.query(sql) Return ResultSet object for query(SELECT).
ResultSet 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); -
ResultSet Statement.query() Return ResultSet
ResultSet 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.
Dbal 示例代码 官网
https://gitee.com/huntlabs/database
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