cloud-fan commented on code in PR #46180:
URL: https://github.com/apache/spark/pull/46180#discussion_r1609814129


##########
connector/connect/common/src/main/scala/org/apache/spark/sql/connect/common/DataTypeProtoConverter.scala:
##########
@@ -177,7 +178,11 @@ object DataTypeProtoConverter {
       case s: StringType =>
         proto.DataType
           .newBuilder()
-          
.setString(proto.DataType.String.newBuilder().setCollationId(s.collationId).build())
+          .setString(
+            proto.DataType.String
+              .newBuilder()
+              
.setCollation(CollationFactory.fetchCollation(s.collationId).collationName)

Review Comment:
   does it mean that the Spark Connect client already knows the collation id, 
but we turn it back to name when sending proto messages to the server?



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