Abhishek Chennaka has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/24439 )

Change subject: KUDU-3782 avoid unsigned underflow in 
MaterializingIterator::Init
......................................................................


Patch Set 1:

(3 comments)

http://gerrit.cloudera.org:8080/#/c/24439/1/src/kudu/common/generic_iterators-test.cc
File src/kudu/common/generic_iterators-test.cc:

http://gerrit.cloudera.org:8080/#/c/24439/1/src/kudu/common/generic_iterators-test.cc@597
PS1, Line 597: ASSERT_FALSE(dst.selection_vector()->IsRowSelected(0));
nit:
Maybe test for 19 too?


http://gerrit.cloudera.org:8080/#/c/24439/1/src/kudu/common/generic_iterators.cc
File src/kudu/common/generic_iterators.cc:

http://gerrit.cloudera.org:8080/#/c/24439/1/src/kudu/common/generic_iterators.cc@1177
PS1, Line 1177: num_columns()
This already returns size_t and the casting below can be avoided?


http://gerrit.cloudera.org:8080/#/c/24439/1/src/kudu/common/generic_iterators.cc@1193
PS1, Line 1193: non_predicate_column_indexes_.reserve
Could there be a case where the number of columns in the projection is less 
than the number of columns in the predicate?
For example something like:

Table Schema:
tenant_id (Primary Key)
user_id (Primary Key)
email (Regular Column)

Query:
SELECT email
FROM users
WHERE tenant_id = 'tenant42'
AND user_id = 4242;

What happens then?



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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I646ab64c2139b37c7e29152695805bf28ef1dd20
Gerrit-Change-Number: 24439
Gerrit-PatchSet: 1
Gerrit-Owner: Gabriella Lotz <[email protected]>
Gerrit-Reviewer: Abhishek Chennaka <[email protected]>
Gerrit-Reviewer: Attila Bukor <[email protected]>
Gerrit-Reviewer: Gabriella Lotz <[email protected]>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Marton Greber <[email protected]>
Gerrit-Reviewer: Zoltan Chovan <[email protected]>
Gerrit-Comment-Date: Thu, 11 Jun 2026 23:40:53 +0000
Gerrit-HasComments: Yes

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