Dan Hecht has posted comments on this change.

Change subject: IMPALA-4821: Update AVG() for DECIMAL_V2
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Patch Set 2: Code-Review+1

(2 comments)

+2 for backend and tests

http://gerrit.cloudera.org:8080/#/c/6038/2/be/src/exprs/aggregate-functions-ir.cc
File be/src/exprs/aggregate-functions-ir.cc:

Line 447:   // The scale of the accumulated sum is set to the scale of the 
output type.
I think this comment would be better in the frontend code since that's where 
the compatibility needs to be maintained.


http://gerrit.cloudera.org:8080/#/c/6038/2/testdata/workloads/functional-query/queries/QueryTest/decimal-exprs.test
File testdata/workloads/functional-query/queries/QueryTest/decimal-exprs.test:

PS2, Line 197: 0
do these results make sense? seems surprising that this decimal place is always 
0, but i haven't looked at the data.


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Gerrit-MessageType: comment
Gerrit-Change-Id: I28f5ef0370938440eb5b1c6d29b2f24e6f88499f
Gerrit-PatchSet: 2
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Michael Ho <[email protected]>
Gerrit-Reviewer: Dan Hecht <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
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