Github user HyukjinKwon commented on a diff in the pull request:
https://github.com/apache/spark/pull/20894#discussion_r188544830
--- Diff: python/pyspark/sql/readwriter.py ---
@@ -373,6 +373,12 @@ def csv(self, path, schema=None, sep=None,
encoding=None, quote=None, escape=Non
default value, ``false``.
:param inferSchema: infers the input schema automatically from
data. It requires one extra
pass over the data. If None is set, it uses the
default value, ``false``.
+ :param enforceSchema: If it is set to ``true``, the specified or
inferred schema will be
+ forcibly applied to datasource files and
headers in CSV files will be
+ ignored. If the option is set to ``false``,
the schema will be
--- End diff --
Is it _ignored_?
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