Shant Hovsepian has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/16073 )

Change subject: IMPALA-7020: fix costing of non-trivial CAST expressions
......................................................................


Patch Set 4: Code-Review+1

(1 comment)

http://gerrit.cloudera.org:8080/#/c/16073/3/fe/src/main/java/org/apache/impala/analysis/CastExpr.java
File fe/src/main/java/org/apache/impala/analysis/CastExpr.java:

http://gerrit.cloudera.org:8080/#/c/16073/3/fe/src/main/java/org/apache/impala/analysis/CastExpr.java@285
PS3, Line 285:         (inType.isVarchar() || inType.getPrimitiveType() == 
PrimitiveType.STRING)) {
> I think that would be a separate case in SortInfo.getMaterializedSortExprs(
It is a weird pattern, I'd expect lpad or substr to be used more often, but I 
did some query searching and using casts to truncate like this does happen, 
probably some hold over from older SQL behavior. Not critical to address.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I3f1a16fc45191a2eedf38cc243c70173d44806c6
Gerrit-Change-Number: 16073
Gerrit-PatchSet: 4
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Aman Sinha <amsi...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Shant Hovsepian <sh...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Comment-Date: Thu, 25 Jun 2020 03:25:35 +0000
Gerrit-HasComments: Yes

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