nsivabalan commented on a change in pull request #1704:
URL: https://github.com/apache/hudi/pull/1704#discussion_r465956954
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File path:
hudi-common/src/main/java/org/apache/hudi/common/model/OverwriteWithLatestAvroPayload.java
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@@ -91,4 +94,37 @@ private boolean isDeleteRecord(GenericRecord genericRecord) {
Object deleteMarker = genericRecord.get(deleteMarkerField);
return (deleteMarker instanceof Boolean && (boolean) deleteMarker);
}
+
+ @Override
+ public Option<IndexedRecord> combineAndGetUpdateValue(IndexedRecord
currentValue, Schema schema, Map<String, String> props) throws IOException {
+ if (recordBytes.length == 0) {
+ return Option.empty();
+ }
+ GenericRecord incomingRecord = bytesToAvro(recordBytes, schema);
+ /*
+ * Combining strategy here returns currentValue on disk if incoming record
is older.
+ * The incoming record can be either a delete (sent as an upsert with
_hoodie_is_deleted set to true)
+ * or an insert/update record. In any case, if it is older than the record
in disk, the currentValue
+ * in disk is returned (to be rewritten with new commit time).
+ *
+ * NOTE: Deletes sent via EmptyHoodieRecordPayload and/or Delete operation
type do not hit this code path
+ * and need to be dealt with separately.
+ */
+ Comparable persistedOrderingVal = (Comparable)
getNestedFieldVal((GenericRecord) currentValue,
props.get(ORDERING_FIELD_OPT_KEY), false);
+ Comparable incomingOrderingVal = (Comparable)
getNestedFieldVal(incomingRecord, props.get(ORDERING_FIELD_OPT_KEY), false);
Review comment:
if schema got evolved and the ordering field for incoming record does
not exist in existing storage, this might throw NPE.
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