cloud-fan commented on code in PR #39925:
URL: https://github.com/apache/spark/pull/39925#discussion_r1102371321
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python/pyspark/sql/connect/dataframe.py:
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@@ -1280,10 +1280,20 @@ def __getitem__(self, item: Union[int, str, Column,
List, Tuple]) -> Union[Colum
if isinstance(item, str):
# Check for alias
alias = self._get_alias()
- if alias is not None:
- return col(alias)
+ _col = alias if alias is not None else item
+ if _col == "*":
+ return Column(UnresolvedStar(unparsed_target=None))
+ elif _col.endswith(".*"):
+ return Column(UnresolvedStar(unparsed_target=_col))
else:
- return col(item)
+ if self._plan is None:
+ raise Exception("Cannot analyze on empty plan.")
+ return Column(
+ ColumnReference(
Review Comment:
like having a private version of `def col` which takes an extra plan id.
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