Csaba Ringhofer has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/23345 )

Change subject: IMPALA-14160: Omit compression, encryption, EC in cache key
......................................................................


Patch Set 1: Code-Review+1

(1 comment)

http://gerrit.cloudera.org:8080/#/c/23345/1/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java
File fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java:

http://gerrit.cloudera.org:8080/#/c/23345/1/fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java@2702
PS1, Line 2702:             // Ignore file_compression, it does not impact file 
contents.
              :             scanRange.hdfs_file_split.file_compression = 
THdfsCompression.NONE;
              :             // Ignore is_encrypted, it does not impact file 
contents.
              :             scanRange.hdfs_file_split.unsetIs_encrypted();
              :             // Ignore erasure coding, it does not impact file 
contents.
              :             scanRange.hdfs_file_split.unsetIs_erasure_coded();
I am not familiar with the tuple cache - do we consider the size of files? If 
yes, then using compression could affect whether it is considered the same file 
or not.

Based on the commit message the issue is not about an actual change in these 
flags, but that Ozone hides this information. This could be reflected in the 
comments here.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3595003b9e1fbbd95524b196db002b857acd7870
Gerrit-Change-Number: 23345
Gerrit-PatchSet: 1
Gerrit-Owner: Michael Smith <michael.sm...@cloudera.com>
Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Joe McDonnell <joemcdonn...@cloudera.com>
Gerrit-Reviewer: Michael Smith <michael.sm...@cloudera.com>
Gerrit-Reviewer: Yida Wu <wydbaggio...@gmail.com>
Gerrit-Comment-Date: Tue, 26 Aug 2025 05:07:33 +0000
Gerrit-HasComments: Yes

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