asmello commented on a change in pull request #23882: [SPARK-26979][PYTHON] Add
missing string column name support for some SQL functions
URL: https://github.com/apache/spark/pull/23882#discussion_r266321520
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File path: python/pyspark/sql/functions.py
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@@ -85,13 +96,16 @@ def _():
>>> df.select(lit(5).alias('height')).withColumn('spark_user',
lit(True)).take(1)
[Row(height=5, spark_user=True)]
"""
-_functions = {
+_name_functions = {
+ # name functions take a column name as their argument
'lit': _lit_doc,
Review comment:
To be fair, `lit` is such a unique function semantically that it would
warrant its own category. But since the implementation is exactly the same as
those "name functions", I left it there for practical purposes.
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