Marcel Kornacker has posted comments on this change.

Change subject: IMPALA-4397,IMPALA-3259: reduce codegen time and memory
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Patch Set 4:

(2 comments)

http://gerrit.cloudera.org:8080/#/c/4956/4/common/thrift/PlanNodes.thrift
File common/thrift/PlanNodes.thrift:

Line 494:   24: required bool disable_codegen
please move up, into the common/non-union part of this struct (field 8?) and 
renumber the rest.


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);
> We could probably do it in the backend but the planner seemed like the appr
i agree, the planner is the right place for making static decisions about 
execution.


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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 <[email protected]>
Gerrit-Reviewer: Marcel Kornacker <[email protected]>
Gerrit-Reviewer: Michael Ho <[email protected]>
Gerrit-Reviewer: Tim Armstrong <[email protected]>
Gerrit-HasComments: Yes

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