HyukjinKwon commented on issue #23882: [SPARK-26979][PYTHON] Add missing string column name support for some SQL functions URL: https://github.com/apache/spark/pull/23882#issuecomment-473824243 > No, this is a different problem. It's not about the API not supporting a column name, it's about it supporting a literal instead. The whole problem we discussed at this PR is, if we're going to support strings as column names in general, no? And there looks a few cases of ambiguity here and there.
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