MYCAT全局序列

1、本地文件方式

sequnceHandlerType = 0

　　/root/data/program/mycat/conf/server.xml   <property name="sequnceHandlerType">0</property>

配置sequence_conf.properties

　　/root/data/program/mycat/conf/sequence_conf.properties　　

　　USERS.HISIDS=
　　USERS.MINID=1001
　　USERS.MAXID=100000000
　　USERS.CURID=1000

　　说明：这里的USERS是server.xml中配置的table name的大写，千万千万注意

<schema name="db_user" checkSQLschema="false" sqlMaxLimit="100">
        <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/>
        <table name="users" dataNode="db_user_dataNode$1-2"  rule="mod-userID-long" primaryKey="userID">
            <childTable name="user_address"  joinKey="userID" parentKey="userID" primaryKey="addressID"/>
        </table>
</schema>

使用next value for MYCATSEQ_XXX

　　INSERT INTO users(userID,phoneNum) values(next value for MYCATSEQ_USERS,'13612345678');

效果

2、数据库方式

sequnceHandlerType = 1

　　/root/data/program/mycat/conf/server.xml   <property name="sequnceHandlerType">1</property>

配置/root/data/program/mycat/conf/sequence_db_conf.properties

　　USERS=db_user_dataNode2

在指定的schema中加入mycat_sequence表
　　<table name = "mycat_sequence" dataNode ="db_user_dataNode2" />

<schema name="db_user" checkSQLschema="false" sqlMaxLimit="100">
        <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/>
        <table name="users" dataNode="db_user_dataNode$1-2"  rule="mod-userID-long" primaryKey="userID">
            <childTable name="user_address"  joinKey="userID" parentKey="userID" primaryKey="addressID"/>
        </table>

        <table name = "mycat_sequence" dataNode ="db_user_dataNode2" />
    </schema>

使用next value for MYCATSEQ_XXX或者指定autoIncrement

 insert into users(userID,phoneNum)values(next value for MYCATSEQ_USERS,'2222222');

另一种方式：指定 autoIncrement="true"

<schema name="db_user" checkSQLschema="false" sqlMaxLimit="100">
        <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/>
        <table name="users" dataNode="db_user_dataNode$1-2"  rule="mod-userID-long" primaryKey="userID" autoIncrement="true">
            <childTable name="user_address"  joinKey="userID" parentKey="userID" primaryKey="addressID"/>
        </table>

        <table name = "mycat_sequence" dataNode ="db_user_dataNode2" />
    </schema>

insert into users(phoneNum)values("8888");

3、本地时间戳方式

ID= 64 位二进制 (42(毫秒)+5(机器 ID)+5(业务编码)+12(重复累加)

sequnceHandlerType = 2

　　/root/data/program/mycat/conf/server.xml   <property name="sequnceHandlerType">2</property>

配置sequence_time_conf.properties

　　默认配置即可

指定autoIncrement

　　只能指定autoIncrement

<schema name="db_user" checkSQLschema="false" sqlMaxLimit="100">
        <table name="data_dictionary" type="global" dataNode="db_user_dataNode1,db_user_dataNode2" primaryKey="dataDictionaryID"/>
        <table name="users" dataNode="db_user_dataNode$1-2"  rule="mod-userID-long" primaryKey="userID" autoIncrement="true">
            <childTable name="user_address"  joinKey="userID" parentKey="userID" primaryKey="addressID"/>
        </table>

        <table name = "mycat_sequence" dataNode ="db_user_dataNode2" />
    </schema>