Calvin Qin created SPARK-57354:
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Summary: Add data source option to list hidden files
Key: SPARK-57354
URL: https://issues.apache.org/jira/browse/SPARK-57354
Project: Spark
Issue Type: New Feature
Components: Spark Core
Affects Versions: 4.2.0
Reporter: Calvin Qin
Spark's file-based data sources skip hidden files and directories (names who
start with `_` or `.` (and files ending in `._COPYING_`) during file listing
and partition discovery. This filter is always on, with no way to override it.
This adds a way to opt out of the filter, with a per-read data source option
`listHiddenFiles` and a session config `spark.sql.files.listHiddenFiles`
(default false)
When true, hidden files and directories are listed. False maintains default
behavior. The per-read option takes precedent over the session config.
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