pnowojski commented on issue #6519: [FLINK-9559] [table] The type of a union of CHAR columns of different lengths should be VARCHAR URL: https://github.com/apache/flink/pull/6519#issuecomment-415420332 What does the SQL standard have to say about this? MySQL is not the most standard compliant db out there. Maybe the problem here is that string literals are of `CHAR(N)` type, while we do not support `CHAR` anywhere else? Maybe our literals should also have a type of `VARCHAR(N)`? That would also solve this problem.
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