数据分片

资源操作

ADD RESOURCE ds_0 (
HOST=127.0.0.1,
PORT=3306,
DB=ds_1,
USER=root,
PASSWORD=root
);
ADD RESOURCE ds_1 (
HOST=127.0.0.1,
PORT=3306,
DB=ds_2,
USER=root,
PASSWORD=root
);

规则操作

• 创建分片规则

CREATE SHARDING TABLE RULE t_order(
RESOURCES(ds_0,ds_1),
SHARDING_COLUMN=order_id,
TYPE(NAME=hash_mod,PROPERTIES("sharding-count"=4)),
GENERATED_KEY(COLUMN=order_id,TYPE(NAME=snowflake,PROPERTIES("worker-id"=123)))
);

• 创建切分表

CREATE TABLE `t_order` (
  `order_id` int NOT NULL,
  `user_id` int NOT NULL,
  `status` varchar(45) DEFAULT NULL,
  PRIMARY KEY (`order_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4

• 删除切分表

DROP TABLE t_order;

• 删除分片规则

DROP SHARDING TABLE RULE t_order;

• 删除数据源

DROP RESOURCE ds_0, ds_1;

• 删除分布式数据库

DROP DATABASE foo_db;