rumbin commented on issue #3043: SQL Lab error in exporting .csv when query has duplicately named columns URL: https://github.com/apache/incubator-superset/issues/3043#issuecomment-340554665 Do you have any cache backend configured for SQLLab? If you haven't, that might be a good starting point for figuring out why we get different results. In my case, Redis is chosen as cache. For this reason, the result of the query gets fetched from the cache when exporting to CSV. If no cache is configured then the query gets run afresh just for the CSV export. I could imagine, that the column renaming was not implemented for this use case. But I haven't checked the code...
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