Gabor Kaszab has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/14896 )

Change subject: IMPALA-9035: Simplify casting string to timestamp.
......................................................................


Patch Set 1:

(2 comments)

Thanks for sending this patch! This seems good in overall, however I also miss 
the test coverage.

http://gerrit.cloudera.org:8080/#/c/14896/1/fe/src/main/java/org/apache/impala/rewrite/SimplifyCastStringToTimestamp.java
File 
fe/src/main/java/org/apache/impala/rewrite/SimplifyCastStringToTimestamp.java:

http://gerrit.cloudera.org:8080/#/c/14896/1/fe/src/main/java/org/apache/impala/rewrite/SimplifyCastStringToTimestamp.java@56
PS1, Line 56: simplified
nit: simplified_expr would be a more verbose name


http://gerrit.cloudera.org:8080/#/c/14896/1/fe/src/main/java/org/apache/impala/rewrite/SimplifyCastStringToTimestamp.java@58
PS1, Line 58: isStringType
As far as I know this includes char arrays as well. Those introduce one more 
step in the conversion for char[n] -> string. Have you tried testing with this 
type as well?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I4ed72d6e7886eaf50d2be60cf45170ffaef5e72d
Gerrit-Change-Number: 14896
Gerrit-PatchSet: 1
Gerrit-Owner: Zhou Xu <[email protected]>
Gerrit-Reviewer: Attila Jeges <[email protected]>
Gerrit-Reviewer: Gabor Kaszab <[email protected]>
Gerrit-Reviewer: Impala Public Jenkins <[email protected]>
Gerrit-Comment-Date: Fri, 13 Dec 2019 15:38:09 +0000
Gerrit-HasComments: Yes

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