[GitHub] [hudi] nsivabalan commented on a diff in pull request #5379: [HUDI-3936] Fix projection for a nested field as pre-combined key

[GitBox <gi...@apache.org>]

nsivabalan commented on code in PR #5379:
URL: https://github.com/apache/hudi/pull/5379#discussion_r854743124


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hudi-client/hudi-spark-client/src/main/scala/org/apache/hudi/HoodieSparkUtils.scala:
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@@ -322,7 +323,9 @@ object HoodieSparkUtils extends SparkAdapterSupport {
       val name2Fields = tableAvroSchema.getFields.asScala.map(f => f.name() -> f).toMap
       // Here have to create a new Schema.Field object
       // to prevent throwing exceptions like "org.apache.avro.AvroRuntimeException: Field already used".
-      val requiredFields = requiredColumns.map(c => name2Fields(c))
+      // For a nested field, we include the root-level field
+      val requiredFields = requiredColumns.map(c => HoodieAvroUtils.getRootLevelFieldName(c))
+        .distinct.map(c => name2Fields(c))

Review Comment:
   just MOR. 



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