mycat+mysql 實現按照月份數據分表

首先下載 mycat：（ “選擇win版本第6個文件就是”）
下載完畢，解壓mycat之後配置環境變量
ok，環境變量配置完畢，解壓後的mycat一大堆文件，首先我們要找到這幾個：
依次打開這幾個文件，我們就按照月份分片配置好mycat
server.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
    - you may not use this file except in compliance with the License. - You 
    may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
    - - Unless required by applicable law or agreed to in writing, software - 
    distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
    License for the specific language governing permissions and - limitations 
    under the License. -->
<!DOCTYPE mycat:server SYSTEM "server.dtd">
<mycat:server xmlns:mycat="http://io.mycat/">
    <system>
    <property name="useSqlStat">0</property>  <!-- 1爲開啓實時統計、0爲關閉 -->
    <property name="useGlobleTableCheck">0</property>  <!-- 1爲開啓全加班一致性檢測、0爲關閉 -->

        <property name="sequnceHandlerType">2</property>
      <!--  <property name="useCompression">1</property>--> <!--1爲開啓mysql壓縮協議-->
        <!--  <property name="fakeMySQLVersion">5.6.20</property>--> <!--設置模擬的MySQL版本號-->
    <!-- <property name="processorBufferChunk">40960</property> -->
    <!-- 
    <property name="processors">1</property> 
    <property name="processorExecutor">32</property> 
     -->
        <!--默認爲type 0: DirectByteBufferPool | type 1 ByteBufferArena-->
        <property name="processorBufferPoolType">0</property>
        <!--默認是65535 64K 用於sql解析時最大文本長度 -->
        <!--<property name="maxStringLiteralLength">65535</property>-->
        <!--<property name="sequnceHandlerType">0</property>-->
        <!--<property name="backSocketNoDelay">1</property>-->
        <!--<property name="frontSocketNoDelay">1</property>-->
        <!--<property name="processorExecutor">16</property>-->
        <!--
            <property name="serverPort">8066</property> <property name="managerPort">9066</property> 
            <property name="idleTimeout">300000</property> <property name="bindIp">0.0.0.0</property> 
            <property name="frontWriteQueueSize">4096</property> <property name="processors">32</property> -->
        <!--分佈式事務開關，0爲不過濾分佈式事務，1爲過濾分佈式事務（如果分佈式事務內只涉及全局表，則不過濾），2爲不過濾分佈式事務,但是記錄分佈式事務日誌-->
        <property name="handleDistributedTransactions">0</property>

            <!--
            off heap for merge/order/group/limit      1開啓   0關閉
        -->
        <property name="useOffHeapForMerge">1</property>

        <!--
            單位爲m
        -->
        <property name="memoryPageSize">1m</property>

        <!--
            單位爲k
        -->
        <property name="spillsFileBufferSize">1k</property>

        <property name="useStreamOutput">0</property>

        <!--
            單位爲m
        -->
        <property name="systemReserveMemorySize">384m</property>


        <!--是否採用zookeeper協調切換  -->
        <property name="useZKSwitch">false</property>

    </system>

    <!-- 全局SQL防火牆設置 -->
    <!-- 
    <firewall> 
       <whitehost>
          <host host="127.0.0.1" user="mycat"/>
          <host host="127.0.0.2" user="mycat"/>
       </whitehost>
       <blacklist check="false">
       </blacklist>
    </firewall>
    -->
    <!--mycat 用戶名-->
    <user name="root">
        <!--mycat 密碼-->
        <property name="password">root</property>
        <property name="schemas">TESTDB</property>
        <!--是否只讀-->
        <property name="readOnly">false</property>
        <!-- 表級 DML 權限設置 

        <privileges check="false">
            <schema name="TESTDB" dml="0110" >

                <table name="dn1" dml="1111"></table>
            </schema>
        </privileges>       -->

    </user>

    <user name="user">
        <property name="password">user</property>
        <property name="schemas">TESTDB</property>
        <property name="readOnly">true</property>


    </user>

</mycat:server>

schema.xml

<?xml version="1.0"?>
<!DOCTYPE mycat:schema SYSTEM "schema.dtd">
<mycat:schema xmlns:mycat="http://io.mycat/">

    <!-- name="TESTDB"是在server.xml中配置<property name="schemas">TESTDB</property>-->
    <schema name="TESTDB" checkSQLschema="false" sqlMaxLimit="100"  > 
    <table name="sensor_data" subTables="january,february,march,april,may,june,july,august,september,october,november,december" primaryKey="id" autoIncrement="true"    dataNode="dn1" rule="sharding-by-month" > </table>
    </schema> 
    <!--配置mysql數據庫testdb2  mycat邏輯庫名爲 dn1-->
    <dataNode name="dn1" dataHost="localhost1" database="testdb2" /> 
    <!--配置數據類型 balance="0"讀寫不分離 -->
    <dataHost name="localhost1" maxCon="1000" minCon="10" balance="0"  writeType="0" dbType="mysql"  dbDriver="native" switchType="1" slaveThreshold="100"> 
            <!--心跳包 -->
            <heartbeat>select user()</heartbeat> 
            <!--配置mysql數據 賬戶密碼 -->
            <writeHost host="hostM1" url="localhost:3306" user="root" password="root" /> 
    </dataHost>
</mycat:schema>

rule.xml

<?xml version="1.0" encoding="UTF-8"?>
<!-- - - Licensed under the Apache License, Version 2.0 (the "License"); 
    - you may not use this file except in compliance with the License. - You 
    may obtain a copy of the License at - - http://www.apache.org/licenses/LICENSE-2.0 
    - - Unless required by applicable law or agreed to in writing, software - 
    distributed under the License is distributed on an "AS IS" BASIS, - WITHOUT 
    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. - See the 
    License for the specific language governing permissions and - limitations 
    under the License. -->
<!DOCTYPE mycat:rule SYSTEM "rule.dtd">
<mycat:rule xmlns:mycat="http://io.mycat/">

    <tableRule name="sharding-by-month"> 
        <rule> 
             <!--按照創建時間分表-->
			 <!--屬性指定對應表中用於分片的列名-->
            <columns>create_time</columns> 
			 <!--屬性對應function 中指定的算法的名稱-->
            <algorithm>sharding-by-month</algorithm> 
        </rule> 

    </tableRule> 

    <function name="sharding-by-month" class="io.mycat.route.function.PartitionByMonth">
            <!--按月分片-->
             <property name="dateFormat">yyyy-MM-dd HH:mm:ss</property>
              <!--開始時間，插入數據只能是這個年份的數據-->
			 <property name="sBeginDate">2020-01-01 00:00:00</property>
			 	 
    </function>

</mycat:rule>

wrapper.conf(主要是修改個wrapper.java.command=自己的jdk路徑)

#********************************************************************
# Wrapper Properties
#********************************************************************
# Java Application
wrapper.java.command=C:\Program Files\Java\jdk1.8.0_131\bin\java.exe
wrapper.working.dir=..

# Java Main class.  This class must implement the WrapperListener interface
#  or guarantee that the WrapperManager class is initialized.  Helper
#  classes are provided to do this for you.  See the Integration section
#  of the documentation for details.
wrapper.java.mainclass=org.tanukisoftware.wrapper.WrapperSimpleApp
set.default.REPO_DIR=lib
set.APP_BASE=.

# Java Classpath (include wrapper.jar)  Add class path elements as
#  needed starting from 1
wrapper.java.classpath.1=lib/wrapper.jar
wrapper.java.classpath.2=conf
wrapper.java.classpath.3=%REPO_DIR%/*

# Java Library Path (location of Wrapper.DLL or libwrapper.so)
wrapper.java.library.path.1=lib

# Java Additional Parameters
#wrapper.java.additional.1=
wrapper.java.additional.1=-DMYCAT_HOME=.
wrapper.java.additional.2=-server
wrapper.java.additional.3=-XX:MaxPermSize=64M
wrapper.java.additional.4=-XX:+AggressiveOpts
wrapper.java.additional.5=-XX:MaxDirectMemorySize=2G
wrapper.java.additional.6=-Dcom.sun.management.jmxremote
wrapper.java.additional.7=-Dcom.sun.management.jmxremote.port=1984
wrapper.java.additional.8=-Dcom.sun.management.jmxremote.authenticate=false
wrapper.java.additional.9=-Dcom.sun.management.jmxremote.ssl=false
wrapper.java.additional.10=-Xmx4G
wrapper.java.additional.11=-Xms1G

# Initial Java Heap Size (in MB)
#wrapper.java.initmemory=3

# Maximum Java Heap Size (in MB)
#wrapper.java.maxmemory=64

# Application parameters.  Add parameters as needed starting from 1
wrapper.app.parameter.1=io.mycat.MycatStartup
wrapper.app.parameter.2=start

#********************************************************************
# Wrapper Logging Properties
#********************************************************************
# Format of output for the console.  (See docs for formats)
wrapper.console.format=PM

# Log Level for console output.  (See docs for log levels)
wrapper.console.loglevel=INFO

# Log file to use for wrapper output logging.
wrapper.logfile=logs/wrapper.log

# Format of output for the log file.  (See docs for formats)
wrapper.logfile.format=LPTM

# Log Level for log file output.  (See docs for log levels)
wrapper.logfile.loglevel=INFO

# Maximum size that the log file will be allowed to grow to before
#  the log is rolled. Size is specified in bytes.  The default value
#  of 0, disables log rolling.  May abbreviate with the 'k' (kb) or
#  'm' (mb) suffix.  For example: 10m = 10 megabytes.
wrapper.logfile.maxsize=0

# Maximum number of rolled log files which will be allowed before old
#  files are deleted.  The default value of 0 implies no limit.
wrapper.logfile.maxfiles=0

# Log Level for sys/event log output.  (See docs for log levels)
wrapper.syslog.loglevel=NONE

#********************************************************************
# Wrapper Windows Properties
#********************************************************************
# Title to use when running as a console
wrapper.console.title=Mycat-server

#********************************************************************
# Wrapper Windows NT/2000/XP Service Properties
#********************************************************************
# WARNING - Do not modify any of these properties when an application
#  using this configuration file has been installed as a service.
#  Please uninstall the service before modifying this section.  The
#  service can then be reinstalled.

# Name of the service
wrapper.ntservice.name=mycat

# Display name of the service
wrapper.ntservice.displayname=Mycat-server

# Description of the service
wrapper.ntservice.description=The project of Mycat-server

# Service dependencies.  Add dependencies as needed starting from 1
wrapper.ntservice.dependency.1=

# Mode in which the service is installed.  AUTO_START or DEMAND_START
wrapper.ntservice.starttype=AUTO_START

# Allow the service to interact with the desktop.
wrapper.ntservice.interactive=false

wrapper.ping.timeout=120
configuration.directory.in.classpath.first=conf

現在打開Navicat，我們按照mycat中schema.xml配置的建立一個testdb2庫和一月到十二月的表

/*
 Navicat Premium Data Transfer

 Source Server         : guoheng
 Source Server Type    : MySQL
 Source Server Version : 50717
 Source Host           : localhost:3306
 Source Schema         : testdb2

 Target Server Type    : MySQL
 Target Server Version : 50717
 File Encoding         : 65001

 Date: 12/03/2020 10:00:52
*/

SET NAMES utf8mb4;
SET FOREIGN_KEY_CHECKS = 0;

-- ----------------------------
-- Table structure for april
-- ----------------------------
DROP TABLE IF EXISTS `april`;
CREATE TABLE `april`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 11 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for august
-- ----------------------------
DROP TABLE IF EXISTS `august`;
CREATE TABLE `august`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for december
-- ----------------------------
DROP TABLE IF EXISTS `december`;
CREATE TABLE `december`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 3 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for february
-- ----------------------------
DROP TABLE IF EXISTS `february`;
CREATE TABLE `february`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 201 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for january
-- ----------------------------
DROP TABLE IF EXISTS `january`;
CREATE TABLE `january`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 202 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for july
-- ----------------------------
DROP TABLE IF EXISTS `july`;
CREATE TABLE `july`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for june
-- ----------------------------
DROP TABLE IF EXISTS `june`;
CREATE TABLE `june`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for march
-- ----------------------------
DROP TABLE IF EXISTS `march`;
CREATE TABLE `march`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 501 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for may
-- ----------------------------
DROP TABLE IF EXISTS `may`;
CREATE TABLE `may`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for november
-- ----------------------------
DROP TABLE IF EXISTS `november`;
CREATE TABLE `november`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 2 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for october
-- ----------------------------
DROP TABLE IF EXISTS `october`;
CREATE TABLE `october`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

-- ----------------------------
-- Table structure for september
-- ----------------------------
DROP TABLE IF EXISTS `september`;
CREATE TABLE `september`  (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `create_time` datetime(0) NULL DEFAULT NULL,
  PRIMARY KEY (`id`) USING BTREE
) ENGINE = InnoDB AUTO_INCREMENT = 1 CHARACTER SET = utf8 COLLATE = utf8_general_ci ROW_FORMAT = Dynamic;

SET FOREIGN_KEY_CHECKS = 1;

接下來點擊 startup_nowrap.bat 啓動mycat
使用Navicat連接mycat（賬號密碼在server.xml中配置）

我們輸入插入sql：

INSERT INTO sensor_data(id,create_time) VALUES(null,'2020-12-21 11:11:11');

發現mycat成功將數據插入到十二月份的表中
日期create_time可以隨意輸入一月到十二月，mycat會根據月份存儲到相應的表中
我們輸入查詢語句

SELECT * from sensor_data;

它將一月到十二月中的數據全部查了出來（mycat抽象成一張表，物理上是十二張表）

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