Quanlong Huang has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/20367 )

Change subject: IMPALA-10976: Sync db/table to latest HMS event for all DDL/DMLs
......................................................................


Patch Set 15:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/20367/15/fe/src/main/java/org/apache/impala/catalog/events/MetastoreEventsProcessor.java
File 
fe/src/main/java/org/apache/impala/catalog/events/MetastoreEventsProcessor.java:

http://gerrit.cloudera.org:8080/#/c/20367/15/fe/src/main/java/org/apache/impala/catalog/events/MetastoreEventsProcessor.java@376
PS15, Line 376:       for (NotificationEvent event : events) {
I think we can optimize this later in a separate JIRA to make sure the table 
will only be reloaded at most once.


http://gerrit.cloudera.org:8080/#/c/20367/14/tests/custom_cluster/test_sync_to_latest_hms_events.py
File tests/custom_cluster/test_sync_to_latest_hms_events.py:

http://gerrit.cloudera.org:8080/#/c/20367/14/tests/custom_cluster/test_sync_to_latest_hms_events.py@37
PS14, Line 37: --file_metadata_reload_properties=''
> This is a real problem with queries involving the 'Insert or Insert overwri
I tried reproducing this and found we should run a query on this table in 
Impala after creating it (so it's in loaded state).

It seems a bug that we update lastSyncedEventId too much beyound what it should 
be (so the INSERT is incorrectly skipped). I think if we just reload the table 
schema and without reloading the file metadata, we shouldn't update 
lastSyncedEventId to the latest event id.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: Ia250d0a943838086c187e5cb7c60035e5a564bbf
Gerrit-Change-Number: 20367
Gerrit-PatchSet: 15
Gerrit-Owner: Sai Hemanth Gantasala <[email protected]>
Gerrit-Reviewer: Anonymous Coward <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Sai Hemanth Gantasala <[email protected]>
Gerrit-Comment-Date: Thu, 14 Dec 2023 12:31:11 +0000
Gerrit-HasComments: Yes

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