pt-online-schema-change utf8mb4 错误解决方法

Character set ‘utf8mb4’ is not a compiled character set and is not specified in the ‘/usr/share/mysql/charsets/Index.xml’ file
Character set ‘utf8mb4’ is not a compiled character set and is not specified in the ‘/usr/share/mysql/charsets/Index.xml’ file
Cannot connect to MySQL: DBI connect(‘med_data;host=127.0.0.1;mysql_read_default_group=client’,’root’,…) failed: Can’t initialize character set utf8mb4 (path: /usr/share/mysql/charsets/) at /usr/bin/pt-online-schema-change line 2281

更改/usr/share/mysql/charsets/Index.xml 内容，将

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< charset name = “utf8” >    < family > Unicode < / family >    < description > UTF – 8 Unicode < / description >    < alias > utf – 8 < / alias >    < collation name = “utf8_general_ci”      id = “33” >    < flag > primary < / flag >    < flag > compiled < / flag >    < / collation >    < collation name = “utf8_bin”              id = “83” >      < flag > binary < / flag >      < flag > compiled < / flag >    < / collation > < / charset >

改为

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< charset name = “utf8mb4” >    < family > Unicode < / family >    < description > UTF – 8 Unicode < / description >    < alias > utf – 8 < / alias >    < collation name = “utf8_general_ci”      id = “33” >    < flag > primary < / flag >    < flag > compiled < / flag >    < / collation >    < collation name = “utf8_bin”              id = “83” >      < flag > binary < / flag >      < flag > compiled < / flag >    < / collation > < / charset >

不光光pt-online-schema-change工具会遇到这个问题，其它工具也会，也是这么解决的。

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