执行 select * from travelrecord ，分析Debug日志，说明整个执行逻辑，包括连接获取，连接同步信息，数据合并，数据返回，连接释放

新增一个分片表 T_VOTE (ID,PROVINCE),PROVINCE用hash分片，并用reload命令方式重载生效，截图和文字说明整个过程。

MySQL Server里Server端字符集UTF8情况下，当客户端字符集配置为latin 与UTF8的情况下，，通过MySQL客户端登录Mycat，执行select操作，通过日志分析，看看MyCAT的执行过程有哪些差别。

1:

mysql> select * from travelrecord;

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id: 6

Current database: TESTDB

+---------+---------+------------+------+------+

+---------+---------+------------+------+------+

| 1 | wang | 2014-01-05 | 511 | 3 |

| 7000001 | wang | 2014-01-05 | 511 | 3 |

+---------+---------+------------+------+------+

2 rows in set (0.26 sec)

[mysql@hongquan ~]$ mysql -usystem -pmysql -P9066 -h10.0.1.134 -DTESTDB

mysql> show @@cache;

+-------------------------------------+-------+------+--------+------+------+---------------+---------------+

| CACHE | MAX | CUR | ACCESS | HIT | PUT | LAST_ACCESS | LAST_PUT |

+-------------------------------------+-------+------+--------+------+------+---------------+---------------+

| ER_SQL2PARENTID | 1000 | 0 | 0 | 0 | 0 | 0 | 0 |

| SQLRouteCache | 10000 | 1 | 7 | 0 | 2 | 1478596909351 | 1478596909353 |

| TableID2DataNodeCache.TESTDB_ORDERS | 50000 | 0 | 0 | 0 | 0 | 0 | 0 |

+-------------------------------------+-------+------+--------+------+------+---------------+---------------+

执行查询

mysql> select * from company;

mysql> select * from travelrecord;

mysql> show @@cache;

+-------------------------------------+-------+------+--------+------+------+---------------+---------------+

| CACHE | MAX | CUR | ACCESS | HIT | PUT | LAST_ACCESS | LAST_PUT |

+-------------------------------------+-------+------+--------+------+------+---------------+---------------+

| ER_SQL2PARENTID | 1000 | 0 | 0 | 0 | 0 | 0 | 0 |

| SQLRouteCache | 10000 | 1 | 12 | 3 | 2 | 1478596994245 | 1478596909353 |

| TableID2DataNodeCache.TESTDB_ORDERS | 50000 | 0 | 0 | 0 | 0 | 0 | 0 |

debug 日志

2016-11-08 00:33:29.115 INFO [$_NIOREACTOR-0-RW] (io.mycat.net.handler.FrontendAuthenticator.success(FrontendAuthenticator.java:194)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB]'system' login success

2016-11-08 00:33:29.121 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.net.FrontendConnection.query(FrontendConnection.java:288)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB] show databases

2016-11-08 00:33:29.122 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.ServerQueryHandler.query(ServerQueryHandler.java:57)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB]show databases

2016-11-08 00:33:29.127 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.net.FrontendConnection.query(FrontendConnection.java:288)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB] show tables

2016-11-08 00:33:29.127 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.ServerQueryHandler.query(ServerQueryHandler.java:57)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB]show tables

2016-11-08 00:33:29.130 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.net.FrontendConnection.query(FrontendConnection.java:288)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB] select * from travelrecord

2016-11-08 00:33:29.130 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.ServerQueryHandler.query(ServerQueryHandler.java:57)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB]select * from travelrecord

2016-11-08 00:33:29.130 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.cache.impl.EnchachePool.get(EnchachePool.java:77)) - SQLRouteCache miss cache ,key:TESTDBselect * from travelrecord

2016-11-08 00:33:29.188 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.cache.impl.EnchachePool.putIfAbsent(EnchachePool.java:60)) - SQLRouteCache add cache ,key:TESTDBselect * from travelrecord value:select * from travelrecord, route={

1 -> dn1{SELECT *

FROM travelrecord

LIMIT 100}

2 -> dn2{SELECT *

FROM travelrecord

LIMIT 100}

3 -> dn3{SELECT *

FROM travelrecord

LIMIT 100}

}

2016-11-08 00:33:29.189 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.NonBlockingSession.execute(NonBlockingSession.java:119)) - ServerConnection [id=6, schema=TESTDB, host=10.0.1.134, user=system,txIsolation=3, autocommit=true, schema=TESTDB]select * from travelrecord, route={

1 -> dn1{SELECT *

FROM travelrecord

LIMIT 100}

2 -> dn2{SELECT *

FROM travelrecord

LIMIT 100}

3 -> dn3{SELECT *

FROM travelrecord

LIMIT 100}

} rrs

2016-11-08 00:33:29.235 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.<init>(MultiNodeQueryHandler.java:101)) - execute mutinode query select * from travelrecord

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.<init>(MultiNodeQueryHandler.java:137)) - has data merge logic

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:170)) - rrs.getRunOnSlave()-null

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:185)) - node.getRunOnSlave()1-null

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:187)) - node.getRunOnSlave()2-null

2016-11-08 00:33:29.243 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:96)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.243 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:127)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.243 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBPool.getRWBanlanceCon(PhysicalDBPool.java:456)) - select read source hostS1 for dataHost:localhost0

2016-11-08 00:33:29.244 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.MySQLConnection.synAndDoExecute(MySQLConnection.java:448)) - con need syn ,total syn cmd 1 commands schema change:true con:MySQLConnection [id=117, lastTime=1478594009244, user=system, schema=db1, old shema=db3, borrowed=true, fromSlaveDB=true, threadId=267, charset=utf8, txIsolation=3, autocommit=true, attachment=dn1{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.245 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:185)) - node.getRunOnSlave()1-null

2016-11-08 00:33:29.245 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:187)) - node.getRunOnSlave()2-null

2016-11-08 00:33:29.246 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:96)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.246 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:127)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.246 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBPool.getRWBanlanceCon(PhysicalDBPool.java:456)) - select read source hostS1 for dataHost:localhost0

2016-11-08 00:33:29.247 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:185)) - node.getRunOnSlave()1-null

2016-11-08 00:33:29.247 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:187)) - node.getRunOnSlave()2-null

2016-11-08 00:33:29.247 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:96)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.247 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBNode.getConnection(PhysicalDBNode.java:127)) - rrs.getRunOnSlave() null

2016-11-08 00:33:29.247 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBPool.getRWBanlanceCon(PhysicalDBPool.java:456)) - select read source hostS1 for dataHost:localhost0

2016-11-08 00:33:29.249 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.okResponse(MultiNodeQueryHandler.java:236)) - received ok response ,executeResponse:false from MySQLConnection [id=117, lastTime=1478594009234, user=system, schema=db1, old shema=db1, borrowed=true, fromSlaveDB=true, threadId=267, charset=utf8, txIsolation=3, autocommit=true, attachment=dn1{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=io.mycat.backend.mysql.nio.MySQLConnection$StatusSync@39b66fca, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.349 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.rowEofResponse(MultiNodeQueryHandler.java:316)) - on row end reseponse MySQLConnection [id=117, lastTime=1478594009234, user=system, schema=db1, old shema=db1, borrowed=true, fromSlaveDB=true, threadId=267, charset=utf8, txIsolation=3, autocommit=true, attachment=dn1{SELECT *

FROM travelrecord

2016-11-08 00:33:29.349 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.NonBlockingSession.releaseConnection(NonBlockingSession.java:354)) - release connection MySQLConnection [id=117, lastTime=1478594009234, user=system, schema=db1, old shema=db1, borrowed=true, fromSlaveDB=true, threadId=267, charset=utf8, txIsolation=3, autocommit=true, attachment=dn1{SELECT *

FROM travelrecord

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDatasource.releaseChannel(PhysicalDatasource.java:442)) - release channel MySQLConnection [id=117, lastTime=1478594009234, user=system, schema=db1, old shema=db1, borrowed=true, fromSlaveDB=true, threadId=267, charset=utf8, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.rowEofResponse(MultiNodeQueryHandler.java:316)) - on row end reseponse MySQLConnection [id=19, lastTime=1478594009234, user=system, schema=db2, old shema=db2, borrowed=true, fromSlaveDB=true, threadId=229, charset=utf8, txIsolation=3, autocommit=true, attachment=dn2{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.NonBlockingSession.releaseConnection(NonBlockingSession.java:354)) - release connection MySQLConnection [id=19, lastTime=1478594009234, user=system, schema=db2, old shema=db2, borrowed=true, fromSlaveDB=true, threadId=229, charset=utf8, txIsolation=3, autocommit=true, attachment=dn2{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDatasource.releaseChannel(PhysicalDatasource.java:442)) - release channel MySQLConnection [id=19, lastTime=1478594009234, user=system, schema=db2, old shema=db2, borrowed=true, fromSlaveDB=true, threadId=229, charset=utf8, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.rowEofResponse(MultiNodeQueryHandler.java:316)) - on row end reseponse MySQLConnection [id=87, lastTime=1478594009234, user=system, schema=db3, old shema=db3, borrowed=true, fromSlaveDB=true, threadId=257, charset=utf8, txIsolation=3, autocommit=true, attachment=dn3{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.server.NonBlockingSession.releaseConnection(NonBlockingSession.java:354)) - release connection MySQLConnection [id=87, lastTime=1478594009234, user=system, schema=db3, old shema=db3, borrowed=true, fromSlaveDB=true, threadId=257, charset=utf8, txIsolation=3, autocommit=true, attachment=dn3{SELECT *

FROM travelrecord

LIMIT 100}, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDatasource.releaseChannel(PhysicalDatasource.java:442)) - release channel MySQLConnection [id=87, lastTime=1478594009234, user=system, schema=db3, old shema=db3, borrowed=true, fromSlaveDB=true, threadId=257, charset=utf8, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

2016-11-08 00:33:29.352 DEBUG [BusinessExecutor0] (io.mycat.memory.unsafe.utils.sort.UnsafeExternalRowSorter.cleanupResources(UnsafeExternalRowSorter.java:109)) - row sorter clean up resources!!!

2016-11-08 00:33:29.370 DEBUG [BusinessExecutor0] (io.mycat.memory.unsafe.memory.mm.DataNodeMemoryManager.releaseExecutionMemory(DataNodeMemoryManager.java:184)) - Thread25 release 1024.0 KB from io.mycat.memory.unsafe.utils.sort.UnsafeExternalSorter@6ec1c256

2016-11-08 00:33:29.370 DEBUG [BusinessExecutor0] (io.mycat.memory.unsafe.memory.mm.DataNodeMemoryManager.releaseExecutionMemory(DataNodeMemoryManager.java:184)) - Thread25 release 128.0 KB from io.mycat.memory.unsafe.utils.sort.UnsafeExternalSorter@6ec1c256

2016-11-08 00:33:29.370 DEBUG [BusinessExecutor0] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.outputMergeResult(MultiNodeQueryHandler.java:441)) - last packet id:10

2016-11-08 00:33:29.370 DEBUG [BusinessExecutor0] (io.mycat.memory.unsafe.utils.sort.UnsafeExternalRowSorter.cleanupResources(UnsafeExternalRowSorter.java:109)) - row sorter clean up resources!!!

分析：

SQLRouteCache miss cache ,key:TESTDBselect * from travelrecord

从路由缓存中查询，发现没有

1 -> dn1{SELECT *

FROM travelrecord

LIMIT 100}

2 -> dn2{SELECT *

FROM travelrecord

LIMIT 100}

3 -> dn3{SELECT *

FROM travelrecord

LIMIT 100}

}

putIfAbsent ，将查询路由put到路由缓存中

1 -> dn1{SELECT *

FROM travelrecord

LIMIT 100}

2 -> dn2{SELECT *

FROM travelrecord

LIMIT 100}

3 -> dn3{SELECT *

FROM travelrecord

LIMIT 100}

} rrs

2016-11-08 00:33:29.235 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.<init>(MultiNodeQueryHandler.java:101)) - execute mutinode query select * from travelrecord

sql的执行路由计划，可以看到sql具体被分配到那个分片执行

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.<init>(MultiNodeQueryHandler.java:137)) - has data merge logic

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:170)) - rrs.getRunOnSlave()-null

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:185)) - node.getRunOnSlave()1-null

2016-11-08 00:33:29.242 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler.execute(MultiNodeQueryHandler.java:187)) - node.getRunOnSlave()2-null

MultiNodeQueryHandler.java ，put缓存池

2016-11-08 00:33:29.243 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDBPool.getRWBanlanceCon(PhysicalDBPool.java:456)) - select read source hostS1 for dataHost:localhost0

从只读datahost hostS1上读取

, respHandler=io.mycat.backend.mysql.nio.handler.MultiNodeQueryHandler@64d72a05, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

readhost配置，host=192.168.3.110

2016-11-08 00:33:29.350 DEBUG [$_NIOREACTOR-0-RW] (io.mycat.backend.datasource.PhysicalDatasource.releaseChannel(PhysicalDatasource.java:442)) - release channel MySQLConnection [id=87, lastTime=1478594009234, user=system, schema=db3, old shema=db3, borrowed=true, fromSlaveDB=true, threadId=257, charset=utf8, txIsolation=3, autocommit=true, attachment=null, respHandler=null, host=192.168.3.110, port=3306, statusSync=null, writeQueue=0, modifiedSQLExecuted=false]

释放连接

2:

T_VOTE (ID,PROVINCE),PROVINCE

[mycat@hongquan conf]$ vim rule.xml

<rule>

<columns>PROVINCE</columns>

<algorithm>hash-int-testhq</algorithm>

</rule>

</tableRul>

<function name="hash-int-testhq"

class="org.opencloudb.route.function.PartitionByFileMap">

<property name="mapFile">partition-hash-int-testhq.txt</property>

</function>

[mycat@hongquan conf]$ touch partition-hash-int-testhq.txt

[mycat@hongquan conf]$ vim partition-hash-int-testhq.txt

sichuan=0

guangdong=1

hunan=2

DEFAULT_NODE=0

[mycat@hongquan conf]$ chmod 777 partition-hash-int-testhq.txt

[mycat@hongquan conf]$ vim schema.xml

mysql> explain create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null);

ERROR 2006 (HY000): MySQL server has gone away

No connection. Trying to reconnect...

Connection id: 13

Current database: TESTDB

ERROR 1064 (HY000): op table not in schema----T_VOTE

mysql> reload @@config;

ERROR 1003 (HY000): Reload config failure

--查看错误日志

INFO | jvm 1 | 2016/11/09 00:33:38 | Caused by: io.mycat.config.util.ConfigException: org.xml.sax.SAXParseException; lineNumber: 38; columnNumber: 11; The element type "tableRule" must be terminated by the matching end-tag "</tableRule>".

INFO | jvm 1 | 2016/11/09 00:33:38 | Caused by: org.xml.sax.SAXParseException; lineNumber: 38; columnNumber: 11; The element type "tableRule" must be terminated by the matching end-tag "</tableRule>".

</tableRul> ----> </tableRule> --修改

INFO | jvm 1 | 2016/11/09 00:35:47 | WrapperSimpleApp: Encountered an error running main: java.lang.ExceptionInInitializerError

INFO | jvm 1 | 2016/11/09 00:35:47 | Caused by: io.mycat.config.util.ConfigException: java.lang.ClassNotFoundException: org.opencloudb.route.function.PartitionByFileMap

INFO | jvm 1 | 2016/11/09 00:35:47 | Caused by: java.lang.ClassNotFoundException: org.opencloudb.route.function.PartitionByFileMap

class="org.opencloudb.route.function.PartitionByFileMap"> -->io.mycat.route.function.PartitionByFileMap ---修改

--启动正常

mysql> explain create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null);

+-----------+----------------------------------------------------------------------------------+

| DATA_NODE | SQL |

+-----------+----------------------------------------------------------------------------------+

| dn2 | create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null) |

| dn1 | create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null) |

| dn3 | create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null) |

+-----------+----------------------------------------------------------------------------------+

3 rows in set (0.03 sec)

mysql> create table T_VOTE (ID int not null primary key,PROVINCE varchar(100) not null);

Query OK, 0 rows affected (0.86 sec)

--database()

insert into T_VOTE(ID,PROVINCE) values(1,'sichuan');

insert into T_VOTE(ID,PROVINCE) values(2,'guangdong');

insert into T_VOTE(ID,PROVINCE) values(3,'hunan');

select * from T_VOTE;

mysql> explain select * from T_VOTE;

+-----------+--------------------------------+

| DATA_NODE | SQL |

+-----------+--------------------------------+

| dn1 | SELECT * FROM T_VOTE LIMIT 100 |

| dn2 | SELECT * FROM T_VOTE LIMIT 100 |

| dn3 | SELECT * FROM T_VOTE LIMIT 100 |

+-----------+--------------------------------+

3 rows in set (0.01 sec)

mysql> select * from T_VOTE;

+----+-----------+

| ID | PROVINCE |

+----+-----------+

| 2 | guangdong |

| 1 | sichuan |

| 3 | hunan |

+----+-----------+

3 rows in set (0.15 sec)

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