subhramit commented on code in PR #58226:
URL: https://github.com/apache/spark/pull/58226#discussion_r3967018191
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sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/csv/CSVOptions.scala:
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@@ -124,7 +124,7 @@ class CSVOptions(
val extension = {
val ext = parameters.getOrElse(EXTENSION, "csv")
- if (ext.size != 3 && !ext.forall(_.isLetter)) {
+ if (ext.size != 3 || !ext.forall(_.isLetter)) {
Review Comment:
Are you proposing we should keep allowing `.abcd`, `.ab1`, `.a`, `.a/b` as
valid csv extensions? As long as the contents of the file are comma-separated?
That seems very odd with regards to how extensions are supposed to work.
It is fine if the extension is missing, hence `getOrElse(EXTENSION, "csv")`
will put `.csv`
But why should things like `.abcd` or `.a/b` be acceptable?
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