Alex Behm has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/8398 )

Change subject: IMPALA-3436: Return a decimal when rounding a double
......................................................................


Patch Set 3:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/8398/3/common/function-registry/impala_functions.py
File common/function-registry/impala_functions.py:

http://gerrit.cloudera.org:8080/#/c/8398/3/common/function-registry/impala_functions.py@285
PS3, Line 285:   [['round_v1','dround_v1'],
> We're not keeping decimal_v1 around indefinitely though are we?
* Yes, we want to remove decimal_v1.
* The alias does not solve the limitations of our V2 functions.
* For users that do not want to switch to V2 the V1 workaround is acceptable.
* For users who want to switch to V2 it seems weird to tell them to use a 
V1-semantics function as workaround, i.e., they'd get inconsistent rounding 
behavior in their workload or even within the same query.

I think it's better to be clear that it doesn't work in V2.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I240ec70da7996bbfefcf6438eba4dff8d33d7bd6
Gerrit-Change-Number: 8398
Gerrit-PatchSet: 3
Gerrit-Owner: Taras Bobrovytsky <[email protected]>
Gerrit-Reviewer: Alex Behm <[email protected]>
Gerrit-Reviewer: Taras Bobrovytsky <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-Comment-Date: Wed, 15 Nov 2017 23:25:47 +0000
Gerrit-HasComments: Yes

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