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-473746378 There is another exception, `when()` which takes columns and literals: ```python >>> spark.range(1).select(when(lit(True), col("id"))).show() ``` ``` +--------------------------+ |CASE WHEN true THEN id END| +--------------------------+ | 0| +--------------------------+ ``` ```python >>> spark.range(1).select(when(lit(True), "id")).show() ``` ``` +--------------------------+ |CASE WHEN true THEN id END| +--------------------------+ | id| +--------------------------+ ``` Here's another ambiguity
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