deniskuzZ commented on PR #5613:
URL: https://github.com/apache/hive/pull/5613#issuecomment-2605279487

   > > > > What is the use case for that service? can't I check the query 
history in HUE or DAS (removed for some storage reason), etc Please take a look 
at #5319 which is being worked on by 
[rtrivedi12](https://github.com/rtrivedi12) I think it provides some extra 
details for an active queries cc @nrg4878
   > > > 
   > > > 
   > > > looks like #5319 is completely different, it uses a well-known SHOW 
PROCESSLIST for the live queries (live==recent==present in hs2 memory), whereas 
Query History Service is meant to be a scalable historical query service, 
scalable in a sense that it uses the iceberg table format
   > > > HUE/DAS might work from different sources, like the protobuf history, 
which's data source also created by a query hook, but this service aims to 
redesign the way of persisting data while trying to use the same or similar 
field names that has already been implemented by impala
   > > > the current HiveProtoLoggingHook contains much information about the 
storage details (e.g. rolling over files and stuff), which makes it look a bit 
less modern when compared to e.g. iceberg format, by which we win everything 
(in terms of performance for instance) that we achieve by working on 
integrating iceberg into our product
   > > 
   > > 
   > > is that supposed to do the same thing as Impala profile: 
https://github.com/apache/impala/blob/fdc43466350db4437b3e917d4ff24dac58af63c3/testdata/impala-profiles/impala_profile_log_tpcds_compute_stats_v2_default.expected.txt#L1445?
   > 
   > if you mean the corresponding impala table, that's implemented in: 
https://issues.apache.org/jira/browse/IMPALA-12426 I can see different upstream 
commits for that, this is the closest one: 
[apache/impala@711a9f2](https://github.com/apache/impala/commit/711a9f2bad84f92dc4af61d49ae115f0dc4239da)
   > 
   > their table is sys.impala_query_log
   
   have you checked how did they implement it, maybe used some tricks to 
improve perf/make it a background activity, etc?


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