Tim Armstrong has posted comments on this change.

Change subject: IMPALA-3586 (Part 1): Implement Union Pass Through
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Patch Set 4:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/5816/4/testdata/workloads/functional-query/queries/QueryTest/union.test
File testdata/workloads/functional-query/queries/QueryTest/union.test:

Line 1069: # IMPALA-3586: This query caused an issue because the tuple size of 
the children
I think this may be something to do with count(*) being non-nullable. Maybe the 
expr in the union node has a nullable slot in that place?

It would be good to understand the root cause so we're sure we fixed the 
underlying bug.


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ia8f6d5062724ba5b78174c3227a7a796d10d8416
Gerrit-PatchSet: 4
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
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-HasComments: Yes

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