Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/17655#discussion_r111770874
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/catalog/SessionCatalog.scala
---
@@ -114,14 +114,14 @@ class SessionCatalog(
* Format table name, taking into account case sensitivity.
*/
protected[this] def formatTableName(name: String): String = {
- if (conf.caseSensitiveAnalysis) name else name.toLowerCase
+ if (conf.caseSensitiveAnalysis) name else name.toLowerCase(Locale.ROOT)
--- End diff --
We have the restrictions on database/table names. That is, the names only
contain characters, numbers, and _.
Without the fixe in this PR, users are not allowed to read/write/create a
table whose name containing `I`, because `toLowerCase` will convert it to `ı`
when the locale is `tr`. The names become illegal. Is my understanding right?
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