Pranav Lodha has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/23560 )

Change subject: IMPALA-14421: Calcite planner: case statement returning wrong 
types for char, varchar
......................................................................


Patch Set 4:

(4 comments)

Thanks Steve, added some minor comments.

http://gerrit.cloudera.org:8080/#/c/23560/4//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/23560/4//COMMIT_MSG@28
PS4, Line 28: .
Add a testing section?


http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/coercenodes/CoerceOperandShuttle.java
File 
java/calcite-planner/src/main/java/org/apache/impala/calcite/coercenodes/CoerceOperandShuttle.java:

http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/coercenodes/CoerceOperandShuttle.java@197
PS4, Line 197: !literal.isNull()
Did we account for other edge cases like empty string literal etc?


http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/FunctionResolver.java
File 
java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/FunctionResolver.java:

http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/FunctionResolver.java@215
PS4, Line 215: ot
nit: not?


http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/RexCallConverter.java
File 
java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/RexCallConverter.java:

http://gerrit.cloudera.org:8080/#/c/23560/4/java/calcite-planner/src/main/java/org/apache/impala/calcite/functions/RexCallConverter.java@216
PS4, Line 216: e ==
Maybe we wanna use .equals() or something.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I82d657f4bfce432c458ee8198188dadf9f23f2ef
Gerrit-Change-Number: 23560
Gerrit-PatchSet: 4
Gerrit-Owner: Steve Carlin <[email protected]>
Gerrit-Reviewer: Aman Sinha <[email protected]>
Gerrit-Reviewer: Fang-Yu Rao <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Reviewer: Joe McDonnell <[email protected]>
Gerrit-Reviewer: Michael Smith <[email protected]>
Gerrit-Reviewer: Pranav Lodha <[email protected]>
Gerrit-Reviewer: Riza Suminto <[email protected]>
Gerrit-Comment-Date: Tue, 11 Nov 2025 19:41:07 +0000
Gerrit-HasComments: Yes

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