Daniel Becker has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/21959 )

Change subject: IMPALA-13370: Read Puffin stats from metadata.json property if 
available
......................................................................


Patch Set 8:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/21959/6/fe/src/main/java/org/apache/impala/catalog/PuffinStatsLoader.java
File fe/src/main/java/org/apache/impala/catalog/PuffinStatsLoader.java:

http://gerrit.cloudera.org:8080/#/c/21959/6/fe/src/main/java/org/apache/impala/catalog/PuffinStatsLoader.java@182
PS6, Line 182:         if (!correspondingMetadataNdv) {
             :           logDuplicateStat(fieldId, existingRecord.file.path(), 
statsFile.path(),
             :               existingRecord.ndv);
             :         }
             :       }
             :     }
> I see, this a bit subtle, could you please add a comment for this?
Added a comment.
When we also read NDVs from other snapshots we will not want to log a warning 
if multiple NDV values come from different snapshots, but we still may want to 
log a warning if they are written for the same snapshot.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I5e92056ce97c4849742db6309562af3b575f647b
Gerrit-Change-Number: 21959
Gerrit-PatchSet: 8
Gerrit-Owner: Daniel Becker <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Daniel Becker <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Peter Rozsa <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
Gerrit-Comment-Date: Fri, 22 Nov 2024 14:44:50 +0000
Gerrit-HasComments: Yes

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