clickhouse-012之全量导出MySQL数据到clickhouse表

把MySQL的表数据全量导入到clichhouse库中

一、环境：

tidb06 mysql5.7.32
tidb05 clickhouse20.8.3.18

二、创建测试库表写入测试数据

tidb06库创建复制账户:

root@tidb06 13:14:  [(none)]> GRANT SELECT, REPLICATION SLAVE, REPLICATION CLIENT ON *.* TO ‘click_rep‘@‘172.16.0.246‘ identified by ‘jwts996‘;flush privileges;
Query OK, 0 rows affected, 1 warning (0.00 sec)

tidb06库创建测试库表test01.tb2并且写入测试数据：

CREATE TABLE `tb2` (
`id` int(8) NOT NULL AUTO_INCREMENT, 
`username` varchar(20) COLLATE utf8_unicode_ci NOT NULL,
`password` varchar(20) COLLATE utf8_unicode_ci NOT NULL, 
`create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT ‘创建时间‘,
PRIMARY KEY (`id`) #主键ID
) ENGINE=innodb AUTO_INCREMENT=0 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;

INSERT INTO tb2(username,password,create_time) values(‘tomcat‘, ‘xiaohuahua‘,now());
INSERT INTO tb2(username,password,create_time) values(‘java‘, ‘xiaohuahua‘,now());
root@tidb06 14:01:  [test01]> select * from tb2;
+----+----------+------------+---------------------+
| id | username | password   | create_time         |
+----+----------+------------+---------------------+
|  1 | tomcat   | xiaohuahua | 2021-07-21 14:01:50 |
|  2 | java     | xiaohuahua | 2021-07-21 14:01:59 |
+----+----------+------------+---------------------+
2 rows in set (0.00 sec)

clickhouse库的建表创建方法:

CREATE TABLE tb2 ENGINE = MergeTree PARTITION BY toYYYYMM(create_time) ORDER BY create_time AS SELECT * FROM mysql(‘172.16.0.247:3306‘, ‘test01‘, ‘tb2‘, ‘click_rep‘, ‘jwts996‘);

提示:clichhouse表中要求必须至少包含一个时间字段

tidb05 :) CREATE TABLE tb2 ENGINE = MergeTree PARTITION BY toYYYYMM(create_time) ORDER BY create_time AS SELECT * FROM mysql(‘172.16.0.247:3306‘, ‘test01‘, ‘tb2‘, ‘click_rep‘, ‘jwts996‘);

CREATE TABLE tb2
ENGINE = MergeTree
PARTITION BY toYYYYMM(create_time)
ORDER BY create_time AS
SELECT *
FROM mysql(‘172.16.0.247:3306‘, ‘test01‘, ‘tb2‘, ‘click_rep‘, ‘jwts996‘)

Ok.

0 rows in set. Elapsed: 0.014 sec. 

tidb05 :) select * from tb2;

SELECT *
FROM tb2

┌─id─┬─username─┬─password───┬─────────create_time─┐
│  1 │ tomcat   │ xiaohuahua │ 2021-07-21 14:01:50 │
│  2 │ java     │ xiaohuahua │ 2021-07-21 14:01:59 │
└────┴──────────┴────────────┴─────────────────────┘

2 rows in set. Elapsed: 0.002 sec. 

到此处完成演示，欢饮一起交流学习。