linliu-code commented on code in PR #12122:
URL: https://github.com/apache/hudi/pull/12122#discussion_r1819852419
##########
hudi-client/hudi-client-common/src/main/java/org/apache/hudi/io/HoodieMergedReadHandle.java:
##########
@@ -166,6 +167,17 @@ private List<HoodieRecord<T>>
doMergedRead(Option<HoodieFileReader> baseFileRead
String key = record.getRecordKey();
if (deltaRecordMap.containsKey(key)) {
deltaRecordKeys.remove(key);
+
+ // When we find a processing time based delete, e.g., a delete
record without valid ordering value,
+ // or with default ordering value, i.e., 0, we can safely ignore
records before the delete record.
+ // That means, we can return the log record without merging with the
record from base file.
+ if
(deltaRecordMap.get(key).getMetaDataInfo(DELETE_FOUND_WITHOUT_ORDERING_VALUE).isPresent())
{
+ if (!deltaRecordMap.get(key).isDelete(readerSchema,
config.getProps())) {
+ mergedRecords.add(deltaRecordMap.get(key));
+ }
+ continue;
+ }
Review Comment:
I think in the end, we could incorporate this behavior in the default merger
logic. But I am not sure how complex it will be, and how many corner cases.
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