Dan Hecht has posted comments on this change.

Change subject: IMPALA-4008: Don't bake ExprContext pointers into IR code
......................................................................


Patch Set 6: Code-Review+2

(4 comments)

http://gerrit.cloudera.org:8080/#/c/4390/5/be/src/codegen/gen_ir_descriptions.py
File be/src/codegen/gen_ir_descriptions.py:

Line 48:   ["AGG_NODE_GET_FN_CTX", "GetAggFnCtx"],
> Not really. Even with the class name, the function name is still a substrin
Yeah, but there's no good reason for those to have different method names, 
right?  I think it'd be better to name them consistently and include the class, 
but since this is the old agg, I don't feel too strongly so you can leave it if 
you prefer.


http://gerrit.cloudera.org:8080/#/c/4390/5/be/src/exec/aggregation-node.h
File be/src/exec/aggregation-node.h:

PS5, Line 81: avoid loading agg_fn_evaluators_[i] at runtime.
> It would be slightly faster to avoid double-dereferencing (i.e. aggregate_e
So you are saying we avoid loading aggregate_evaluators[i] entirely on the 
codegen path? if that's the case, then okay.


http://gerrit.cloudera.org:8080/#/c/4390/6/be/src/exec/aggregation-node.h
File be/src/exec/aggregation-node.h:

PS6, Line 81: agg_fn_evaluators_
does this mean to say aggregate_evaluators_?


http://gerrit.cloudera.org:8080/#/c/4390/6/be/src/exec/partitioned-aggregation-node.h
File be/src/exec/partitioned-aggregation-node.h:

PS6, Line 203: agg_fn_evaluators_
aggregate_evaluators_?


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Gerrit-MessageType: comment
Gerrit-Change-Id: I42039eed803a39fa716b9ed647510b6440974ae5
Gerrit-PatchSet: 6
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com>
Gerrit-Reviewer: Michael Ho <k...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-HasComments: Yes

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