jorisvandenbossche commented on a change in pull request #11031:
URL: https://github.com/apache/arrow/pull/11031#discussion_r699278233
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File path: python/pyarrow/parquet.py
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@@ -511,14 +511,14 @@ def _sanitize_table(table, new_schema, flavor):
Write timestamps to INT96 Parquet format. Defaults to False unless enabled
by flavor argument. This take priority over the coerce_timestamps option.
coerce_timestamps : str, default None
- Cast timestamps a particular resolution. The defaults depends on `version`.
- For ``version='1.0'`` (the default), nanoseconds will be cast to
- microseconds ('us'), and seconds to milliseconds ('ms') by default.
- For ``version='2.4'``, nanoseconds will be cast to microseconds.
- For ``version='2.6'``, the original resolution is always preserved.
- The casting might result in loss of data, in which case
- ``allow_truncated_timestamps=True`` can be used to suppress the raised
- exception.
+ Cast timestamps to a particular resolution. If omitted, defaults are chosen
+ depending on `version`. By default, for ``version='1.0'`` (the default)
+ and ``version='2.4'``, nanoseconds are cast to microseconds ('us'), while
+ for other `version` values, they are written natively without loss
+ of resolution. Seconds are always cast to milliseconds ('ms') by default,
+ as Parquet does not have any temporal type with seconds resolution.
+ If the casting results in loss of data, it will raise an exception
+ unless ``allow_truncated_timestamps=True`` is given.
Review comment:
Very clear now!
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