wzx140 commented on code in PR #5629:
URL: https://github.com/apache/hudi/pull/5629#discussion_r936357691
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hudi-common/src/main/java/org/apache/hudi/common/model/HoodieRecordMerger.java:
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@@ -30,9 +34,19 @@
* It can implement the merging logic of HoodieRecord of different engines
* and avoid the performance consumption caused by the
serialization/deserialization of Avro payload.
*/
-public interface HoodieMerge extends Serializable {
-
- HoodieRecord preCombine(HoodieRecord older, HoodieRecord newer);
+@PublicAPIClass(maturity = ApiMaturityLevel.EVOLVING)
+public interface HoodieRecordMerger extends Serializable {
+
+ /**
+ * This method converges combineAndGetUpdateValue and precombine from
HoodiePayload.
+ * It'd be associative operation: f(a, f(b, c)) = f(f(a, b), c) (which we
can translate as having 3 versions A, B, C
+ * of the single record, both orders of operations applications have to
yield the same result)
+ */
+ Option<HoodieRecord> merge(HoodieRecord older, HoodieRecord newer, Schema
schema, Properties props) throws IOException;
Review Comment:
Maybe insert a marker in HoodieRecord?
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