mycat linux 搭建，分表分库，增长长插入

1. 下载Mycat-server-1.6.7.1-release-20200209222254-linux.tar
   下载地址：Mycat-server-1.6.7.1-release-20200209222254-linux.tar
2. 解压 进入bin 启动

./mycat start  启动
./mycat stop  停止
./mycat restart 重启

3. mycat分库分表
   server.xml

<?xml version="1.0" encoding="UTF-8"?>  
<!DOCTYPE mycat:server SYSTEM "server.dtd">  
<mycat:server xmlns:mycat="http://io.mycat/">  
     <system> 
             <property name="defaultSqlParser">druidparser</property>  
             <property name="mutiNodeLimitType">1</property>  
			 <property name="sequnceHandlerType">1</property>       
             <!-- mycat服务的端口号  -->  
             <property name="serverPort">8066</property>  
             <!-- mycat管理的端口号  -->
             <property name="managerPort">9066</property>   
     </system>

     <!-- 配置连接Mycat的用户名, 密码, 逻辑数据库名称  -->  
     <user name="hikari">  
             <property name="password">hikari123</property>  
             <property name="schemas">HIKARI_CLOUD</property>  
     </user>  
</mycat:server>

schema.xml

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">
	 <schema name="HIKARI_CLOUD" checkSQLschema="false" sqlMaxLimit="100">
        <table name="tb_admin" dataNode="dataNode0,dataNode1,dataNode2,dataNode3,dataNode4,dataNode5,dataNode6,dataNode7,dataNode8,dataNode9" rule="mod-long"/>   
		<table name="tb_user" dataNode="dataNode0,dataNode1,dataNode2,dataNode3,dataNode4,dataNode5,dataNode6,dataNode7,dataNode8,dataNode9" rule="mod-long"/>   
    </schema>  
	
	<dataNode name="dataNode0" dataHost="localhost" database="hikari_cloud_0" />
	<dataNode name="dataNode1" dataHost="localhost" database="hikari_cloud_1" />
	<dataNode name="dataNode2" dataHost="localhost" database="hikari_cloud_2" />
	<dataNode name="dataNode3" dataHost="localhost" database="hikari_cloud_3" />
	<dataNode name="dataNode4" dataHost="localhost" database="hikari_cloud_4" />
	<dataNode name="dataNode5" dataHost="localhost" database="hikari_cloud_5" />
	<dataNode name="dataNode6" dataHost="localhost" database="hikari_cloud_6" />
	<dataNode name="dataNode7" dataHost="localhost" database="hikari_cloud_7" />
	<dataNode name="dataNode8" dataHost="localhost" database="hikari_cloud_8" />
	<dataNode name="dataNode9" dataHost="localhost" database="hikari_cloud_9" />

	<dataHost name="localhost" maxCon="1000" minCon="10" balance="1"
			  writeType="0" dbType="mysql" dbDriver="native" switchType="1"  slaveThreshold="100">
		<heartbeat>select user()</heartbeat>
		<writeHost host="hostM1" url="localhost:3306" user="hikari"
				   password="hikari123">
		</writeHost>
	</dataHost>
</mycat:schema>

rule.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mycat:rule SYSTEM "rule.dtd">
<mycat:rule xmlns:mycat="http://io.mycat/">
  <tableRule name="mod-long">
     <rule>
       <columns>id</columns>
       <algorithm>mod-long</algorithm>
     </rule>
  </tableRule>
  <function name="mod-long" class="io.mycat.route.function.PartitionByMod">
     <!-- dataNode数量(根据实际情况进行修改此配置) -->
     <property name="count">10</property>
  </function>
</mycat:rule>

4. id 自增长
   在同一个节点任何一个数据库上
   新建MYCAT_SEQUENCE 表

CREATE TABLE MYCAT_SEQUENCE(
  name VARCHAR(50) NOT NULL COMMENT 'sequence名称',
  current_value INT NOT NULL COMMENT '当前value',
  increment INT NOT NULL DEFAULT 100 COMMENT '增长步长',
  PRIMARY KEY(name)
) ENGINE=InnoDB;

 INSERT INTO MYCAT_SEQUENCE(NAME,current_value,increment) VALUES ('ADMIN', 3, 1);

sql 创建三个sql函数

DROP FUNCTION IF EXISTS mycat_seq_currval;
DELIMITER $$
CREATE FUNCTION mycat_seq_currval(seq_name VARCHAR(50))RETURNS VARCHAR(64) CHARSET 'utf8'
BEGIN
DECLARE retval VARCHAR(64);
SET retval='-999999999,NULL';
SELECT CONCAT(CAST(current_value AS CHAR),',',CAST(increment AS CHAR)) INTO retval FROM
MYCAT_SEQUENCE WHERE NAME = seq_name;
RETURN retval;
END$$
DELIMITER ;




DROP FUNCTION IF EXISTS mycat_seq_setval;
DELIMITER $$
CREATE FUNCTION mycat_seq_setval(seq_name VARCHAR(50),VALUE INTEGER) RETURNS VARCHAR(64) CHARSET 'utf8'
BEGIN
   UPDATE MYCAT_SEQUENCE SET current_value = VALUE    WHERE NAME = seq_name;
RETURN mycat_seq_currval(seq_name);
END$$
DELIMITER ;



DROP FUNCTION IF EXISTS mycat_seq_nextval;
DELIMITER $$
CREATE FUNCTION mycat_seq_nextval(seq_name VARCHAR(50)) RETURNS VARCHAR(64) CHARSET 'utf8'
BEGIN
UPDATE MYCAT_SEQUENCE SET current_value = current_value + increment 
WHERE NAME = seq_name;
RETURN mycat_seq_currval(seq_name);
END$$
DELIMITER ;

修改

插入测试

INSERT INTO  tb_admin (id,user_name)  VALUES (NEXT VALUE FOR MYCATSEQ_ADMIN,"xxx")