Hi everyone, Recently I am using Flink SQL API to test some SQL queries. I run a small dataset and output the result to CsvTableSink so that I can easily open the file and verify the result by eye. But unfortunately, I found that CsvTableSink does not support retraction message and thus I could not output some of the query results to CSV files and verify them.
So I am wondering can we either support an InMemoryTableSink or support retraction in CsvTableSink so that Flink developers can easily debug and verify their result in a small dataset without introducing an extra system such as HBase or MySQL. Thanks.
