xbaran commented on a change in pull request #526: HIVE-21218: KafkaSerDe 
doesn't support topics created via Confluent
URL: https://github.com/apache/hive/pull/526#discussion_r254985491
 
 

 ##########
 File path: kafka-handler/src/java/org/apache/hadoop/hive/kafka/KafkaSerDe.java
 ##########
 @@ -369,6 +379,20 @@ private SubStructObjectInspector(StructObjectInspector 
baseOI, int toIndex) {
     }
   }
 
+  static class ConfluentAvroBytesConverter extends AvroBytesConverter {
+    ConfluentAvroBytesConverter(Schema schema) {
+      super(schema);
+    }
+
+    @Override
+    Decoder getDecoder(byte[] value) {
+      /**
+       * Confluent 4 magic bytes that represents Schema ID as Integer. These 
bits are added before value bytes.
+       */
+      return DecoderFactory.get().binaryDecoder(value, 5, value.length - 5, 
null);
 
 Review comment:
   That `value.length - 5` is cuz u provide `start` and `length` not `start` 
and `end` offsets.

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