Specified key was too long； max key length is 767 bytes。

問題： spark sql連接hive的元數據（mysql庫）時報錯：Specified key was too long; max key length is 767 bytes。 解決： 其實是mysql數據字符集問題，只要修改mysql中hive元數據庫的字符集便可，即alter database dbname character set latin1;可是設置後啓動時仍然報錯，啓動命令如下

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