Quanlong Huang has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/24426 )

Change subject: IMPALA-14601: Support HBO for JoinNode cardinality
......................................................................


Patch Set 26:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/24426/24/fe/src/main/java/org/apache/impala/planner/ExprCanonicalizer.java
File fe/src/main/java/org/apache/impala/planner/ExprCanonicalizer.java:

http://gerrit.cloudera.org:8080/#/c/24426/24/fe/src/main/java/org/apache/impala/planner/ExprCanonicalizer.java@191
PS24, Line 191:    * source-expr chain.
> A materialized expression can lose its operand qualifiers here. `SortInfo`
Nice catch! I'm able to reproduce the issue using an Aggregation over Join:

 select coalesce(a.id, b.int_col), count(*)
 from functional.alltypes a join functional.alltypestiny b on a.id = b.id
 group by coalesce(a.id, b.int_col);

I can see the HBO key string has "coalesce(id, int_col)" which is missing the 
qualifiers. Fixed the issue by qualifying the SlotRefs in source expressions 
recursively.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I70b655ae7027d0d9eb8e9fae9ba2e1b7ad9876b4
Gerrit-Change-Number: 24426
Gerrit-PatchSet: 26
Gerrit-Owner: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Aleksandr Efimov <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Quanlong Huang <[email protected]>
Gerrit-Reviewer: Steve Carlin <[email protected]>
Gerrit-Comment-Date: Wed, 02 Sep 2026 09:07:17 +0000
Gerrit-HasComments: Yes

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