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支持 rowid 切分数据方案? #273

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@melin

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@melin

参考sqoop 中,oracle 切分数据,采用rowid 切分数据,能够保证数据切分比较均匀。不需要用户去选择切分字段,tidb 是否支持类似特性
https://github.com/apache/sqoop/blob/f8beae32a067d72bf9ed6e903b041ad347ca5491/src/java/org/apache/sqoop/manager/oracle/OraOopOracleQueries.java#L335C51-L335C76

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