minihippo commented on a change in pull request #3173:
URL: https://github.com/apache/hudi/pull/3173#discussion_r745656950
##########
File path:
hudi-common/src/main/java/org/apache/hudi/keygen/BaseKeyGenerator.java
##########
@@ -71,11 +75,24 @@ public final HoodieKey getKey(GenericRecord record) {
}).collect(Collectors.toList());
}
+ public List<String> getIndexKeyFields() {
+ return indexKeyFields;
+ }
+
public List<String> getRecordKeyFields() {
return recordKeyFields;
}
public List<String> getPartitionPathFields() {
return partitionPathFields;
}
+
+ /**
+ * If index key exists, it should be the subset of the record key list.
+ */
+ protected void validateIndexKeyField() {
Review comment:
No, only field in the record field can guarantee value's immutability.
Once the record value changes, the updated record cannot find the file group
where it was originally located.
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