Daniel Becker has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/20494 )

Change subject: IMPALA-12390 (part 4): Enable unnecessary-value-param
......................................................................


Patch Set 4:

(10 comments)

I went through the rest.

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/runtime/outbound-row-batch.h
File be/src/runtime/outbound-row-batch.h:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/runtime/outbound-row-batch.h@38
PS4, Line 38: allocator
Shouldn't we take it by raw pointer or reference?


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.h
File be/src/service/impala-server.h:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.h@1502
PS4, Line 1502: session
Could take by raw pointer, as in for example SetupResultsCacheing().


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.h@1510
PS4, Line 1510: session
Could take by raw pointer, as in for example SetupResultsCacheing().


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.cc
File be/src/service/impala-server.cc:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.cc@889
PS4, Line 889: query_record
Couldn't this be a const ref?


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/service/impala-server.cc@1464
PS4, Line 1464: &
We take 'session_state' in ImpalaServer::RegisterQuery() by pointer, shouldn't 
we do the same here? Usually when the value is not const we take it by pointer.


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/THttpServer.h
File be/src/transport/THttpServer.h:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/THttpServer.h@106
PS4, Line 106: std::string&, std::string&
Can't these be const refs?


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/THttpServer.h@111
PS4, Line 111: std::string&
Can't this be a const ref?


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/TSaslServerTransport.cpp
File be/src/transport/TSaslServerTransport.cpp:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/TSaslServerTransport.cpp@59
PS4, Line 59: flags
'flags' is an unsigned int, no need to move it. Or would you like to move it 
for consistency?


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/transport/TSaslServerTransport.cpp@59
PS4, Line 59: move(props), move(callbacks)
'props' and 'callbacks' are taken by reference.


http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/util/decimal-util.h
File be/src/util/decimal-util.h:

http://gerrit.cloudera.org:8080/#/c/20494/4/be/src/util/decimal-util.h@55
PS4, Line 55: int256_t
I wonder if we ever have unaligned 'int256_t's. If we do, this might cause a 
problem if the compiler generates alignment-sensitive instructions here. I 
don't know if that's possible... I came across a similar thing in 
https://gerrit.cloudera.org/#/c/16134/, but it's possible that that commit also 
ensures this doesn't happen here.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I8aa5d98596d82f615a0a728e0235e7dd9d8b5003
Gerrit-Change-Number: 20494
Gerrit-PatchSet: 4
Gerrit-Owner: Michael Smith <[email protected]>
Gerrit-Reviewer: Anonymous Coward <[email protected]>
Gerrit-Reviewer: Daniel Becker <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Comment-Date: Fri, 22 Sep 2023 14:32:21 +0000
Gerrit-HasComments: Yes

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