hive连MySQL数据库创建表时报错该怎么办

hive连MySQL数据库创建表时报错该怎么办，很多新手对此不是很清楚，为了帮助大家解决这个难题，下面小编将为大家详细讲解，有这方面需求的人可以来学习下，希望你能有所收获。

1. 报错信息：
    2018-06-01 14:44:20,644 ERROR [main]: DataNucleus.Datastore (Log4JLogger.java:error(115)) - Error thrown executing CREATE TABLE `TABLE_PARAMS`
    (
        `TBL_ID` BIGINT NOT NULL,
        `PARAM_KEY` VARCHAR(256) BINARY NOT NULL,
        `PARAM_VALUE` VARCHAR(4000) BINARY NULL,
        CONSTRAINT `TABLE_PARAMS_PK` PRIMARY KEY (`TBL_ID`,`PARAM_KEY`)
    ) ENGINE=INNODB : Specified key was too long; max key length is 767 bytes
    com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Specified key was too long; max key length is 767 bytes
            at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
            at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
            at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
            at java.lang.reflect.Constructor.newInstance(Constructor.java:422)
            at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
            at com.mysql.jdbc.Util.getInstance(Util.java:381)
            at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
            at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
            at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3515)
            at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3447)
            at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1951)
            at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2101)
            at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2548)
            at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2477)
            at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:741)
            at com.mysql.jdbc.StatementImpl.execute(StatementImpl.java:587)
            at com.jolbox.bonecp.StatementHandle.execute(StatementHandle.java:254)
            at org.datanucleus.store.rdbms.table.AbstractTable.executeDdlStatement(AbstractTable.java:760)
            at org.datanucleus.store.rdbms.table.AbstractTable.executeDdlStatementList(AbstractTable.java:711)
            at org.datanucleus.store.rdbms.table.AbstractTable.create(AbstractTable.java:425)
            at org.datanucleus.store.rdbms.table.AbstractTable.exists(AbstractTable.java:488)
            at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.performTablesValidation(RDBMSStoreManager.java:3380)
            at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.addClassTablesAndValidate(RDBMSStoreManager.java:3190)
            at org.datanucleus.store.rdbms.RDBMSStoreManager$ClassAdder.run(RDBMSStoreManager.java:2841)
            at org.datanucleus.store.rdbms.AbstractSchemaTransaction.execute(AbstractSchemaTransaction.java:122)

2. 解决方案：
    在MySQL数据库修改“hive数据库”的编码，在MySQL下执行命令：alter database  hive数据库  character set latin1;  
    hive启动后，MySQL数据库里面会创建指定的数据库，ruozedb是在hive.site.xml文件中的MySQL连接URL指定的数据库。 
    2.1 登录MySQL数据库查看Database：
        mysql> show databases;
        +--------------------+
        | Database           |
        +--------------------+
        | information_schema |
        | mysql              |
        | performance_schema |
        | ruozedb            |
        | test               |
        +--------------------+
        5 rows in set (0.00 sec)

    2.2 在MySQL数据库执行如下操作：

        mysql> alter database ruozedb character set latin1;
        Query OK, 1 row affected (0.00 sec)
        
    2.3 在hive里面执行创建脚本
        hive> show databases;
        OK
        default
        Time taken: 2.158 seconds, Fetched: 1 row(s)
        hive> create table psn_info(id int ,name varchar(200),age int , tel varchar(20),email varchar(100));
        OK
        Time taken: 2.913 seconds
        hive> show tables;
        OK
        psn_info
        Time taken: 0.132 seconds, Fetched: 1 row(s)

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