Gabor Kaszab has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/9986 )

Change subject: IMPALA-3307: Add support for IANA time-zone db
......................................................................


Patch Set 2:

(4 comments)

http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/exprs/timezone_db.h
File be/src/exprs/timezone_db.h:

http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/exprs/timezone_db.h@31
PS2, Line 31: class TimezoneDatabase {
My general feeling about this class is that a bit more transparency would add 
great value. What I mean is that some additional class level comments would 
really help e.g. what is the exact format of the inputs to this class, what 
sources it can have, in nutshell what transformation is done on that data, and 
how it uses the processed data later on.

What do you think?


http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/exprs/timezone_db.cc
File be/src/exprs/timezone_db.cc:

http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/exprs/timezone_db.cc@420
PS2, Line 420: /* = nullptr */
drop this comment


http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/exprs/timezone_db.cc@495
PS2, Line 495: ZONEINFO_DIR
nit: ZONE_INFO_DIR?


http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/runtime/timestamp-value.h
File be/src/runtime/timestamp-value.h:

http://gerrit.cloudera.org:8080/#/c/9986/2/be/src/runtime/timestamp-value.h@101
PS2, Line 101:   static TimestampValue FromUnixTime(time_t unix_time, const 
cctz::time_zone* local_tz) {
Do you think that mentioning the new param for these functions would add extra 
value?



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I93c1fbffe81f067919706e30db0a34d0e58e7e77
Gerrit-Change-Number: 9986
Gerrit-PatchSet: 2
Gerrit-Owner: Attila Jeges <[email protected]>
Gerrit-Reviewer: Attila Jeges <[email protected]>
Gerrit-Reviewer: Csaba Ringhofer <[email protected]>
Gerrit-Reviewer: Gabor Kaszab <[email protected]>
Gerrit-Reviewer: Zoltan Borok-Nagy <[email protected]>
Gerrit-Comment-Date: Fri, 20 Apr 2018 12:00:42 +0000
Gerrit-HasComments: Yes

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