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From "Michael Ho (Code Review)" <ger...@cloudera.org>
Subject [Impala-ASF-CR] IMPALA-4397,IMPALA-3259: reduce codegen time and memory
Date Wed, 16 Nov 2016 20:35:43 GMT
Michael Ho has posted comments on this change.

Change subject: IMPALA-4397,IMPALA-3259: reduce codegen time and memory
......................................................................


Patch Set 4:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/4956/4/fe/src/main/java/org/apache/impala/planner/DistributedPlanner.java
File fe/src/main/java/org/apache/impala/planner/DistributedPlanner.java:

PS4, Line 823: if (!hasGrouping) mergeAggNode.setDisableCodegen(true);
A high level question: is there a reason why this decision cannot be made in PartitionedAggregationNode::Codegen()
? I suppose there is way for an Agg node to know whether it's a merging Agg node, right ?


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Gerrit-MessageType: comment
Gerrit-Change-Id: Id10015b49da182cb181a653ac8464b4a18b71091
Gerrit-PatchSet: 4
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Tim Armstrong <tarmstrong@cloudera.com>
Gerrit-Reviewer: Michael Ho <kwho@cloudera.com>
Gerrit-HasComments: Yes

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