uros-b commented on code in PR #58226:
URL: https://github.com/apache/spark/pull/58226#discussion_r3978319883
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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:
> keep letters-only and drop the length rule, updating the doc + error
message to "limited to letters."
This sounds reasonable to me... but I do wonder whether this is
standardized, and how? Do we have references?
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