Saikrishna Pujari created SPARK-38004:
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Summary: read_excel's parameter - mangle_dupe_cols is used to
handle duplicate columns but fails if the duplicate columns are case sensitive.
Key: SPARK-38004
URL: https://issues.apache.org/jira/browse/SPARK-38004
Project: Spark
Issue Type: Bug
Components: PySpark
Affects Versions: 3.1.2
Reporter: Saikrishna Pujari
mangle_dupe_cols - default is True
So ideally it should have handled duplicate columns, but in case the columns
are case sensitive it fails as below.
AnalysisException: Reference '{{{}Sheet.col1{}}}' is ambiguous, could be
Sheet.col1, Sheet.col1.
Where two columns are Col1 and cOl1
In the best practices, there is a mention of not to use case sensitive columns
-
[https://koalas.readthedocs.io/en/latest/user_guide/best_practices.html#do-not-use-duplicated-column-names]
Either the docs for read_excel/mangle_dupe_cols have to be updated about this
or it has to be handled.
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