stczwd commented on a change in pull request #29088:
URL: https://github.com/apache/spark/pull/29088#discussion_r454746965
##
File path:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/csv/CsvOutputWriter.scala
##
@@ -39,6 +39,10 @@ class CsvOutputWriter(
private val gen = new UnivocityGenerator(dataSchema, writer, params)
+ if (params.bom) {
+writer.write(0xFEFF)
Review comment:
We meet the same problem in our project, and we use `0xEFBBBF` as
default BOM for UTF-8, it will change the value if we use `0xFEFF`. Besides, we
have meet other problems, such as the commas were used incorrectly or quotation
marks were not displayed properly. If we fix these problems, it will cause
other users can not read these files with other tools.
Hm, what I trying to say is, maybe it is not a good idea to change
CsvOutputWriter to fit Excel format. It can be done in project before use
downloads the csv files or just use Excel to import.
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