JingsongLi commented on issue #9864: [FLINK-14254][table] Introduce FileSystemOutputFormat for batch URL: https://github.com/apache/flink/pull/9864#issuecomment-558645270 > Thanks @JingsongLi for the update. I suppose the purpose of introducing these abstractions is to support writing partitions to different external systems other than Hive. Can we have a summary about what a user/developer needs to implement in order to achieve that? Hi @lirui-apache , there is no plan to support other external systems at present or in the foreseeable future. There are only two implementations: - Hive - Flink file system connector(Note: this is just one implementation, formats just need implement input/output formats). So, I don't think we need expose it to users. So I think code comments are better than documents. And there is a summary, actually just need implement: - OutputFormatFactory - TableMetaStoreFactory You can take a look to `FileSystemOutputFormat.Builder`, only these two are necessary.
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