Lzgpom commented on code in PR #188:
URL: 
https://github.com/apache/flink-connector-aws/pull/188#discussion_r1981100443


##########
flink-connector-aws/flink-connector-aws-kinesis-streams/src/main/java/org/apache/flink/connector/kinesis/source/reader/KinesisShardSplitReaderBase.java:
##########
@@ -50,10 +49,10 @@
 /** Base implementation of the SplitReader for reading from 
KinesisShardSplits. */
 @Internal
 public abstract class KinesisShardSplitReaderBase
-        implements SplitReader<Record, KinesisShardSplit> {
+        implements SplitReader<KinesisClientRecord, KinesisShardSplit> {

Review Comment:
   I have been looking at the implications of not changing from `Record` into 
`KinesisClientRecord` and this is what I have found:
   
   - The deaggreated records would have to be converted from 
`KinesisClientRecord`, since `AggregatorUtil` only uses `KinesisClientRecord`,  
to `Record` adding a slight overhead.
   - The `KinesisClientRecord` has the `subSequenceNumber` that could and 
should be used for checkpointing.
   
   Apart from that I don't see any more issues. Either way I don't mind 
changing it back to `Record`. 



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