nikolamand-db commented on code in PR #46180:
URL: https://github.com/apache/spark/pull/46180#discussion_r1606746445


##########
sql/catalyst/src/main/scala/org/apache/spark/sql/internal/SQLConf.scala:
##########
@@ -772,12 +772,17 @@ object SQLConf {
         " produced by a builtin function such as to_char or CAST")
       .version("4.0.0")
       .stringConf
-      .checkValue(CollationFactory.isValidCollation,
+      .checkValue(
+        collationName => {
+          try {
+            CollationFactory.fetchCollation(collationName)
+            true
+          } catch {
+            case e: SparkException if e.getErrorClass == 
"COLLATION_INVALID_NAME" => false
+          }
+        },

Review Comment:
   Resolving the discussion, we removed `isValidCollation` from 
`CollationFactory` and chose to scope it to only here as it's logic of catching 
exception as part of control flow is not a good approach for general-purpose 
utility function.



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