Alexander Saydakov has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/17869 )

Change subject: IMPALA-10956: datasketches UDFs: memory leak and merge overhead
......................................................................


Patch Set 3:

(1 comment)

> please write once again if you want the code to be merged as it is or add 
> updates
I would suggest merging as is, and do another round of improvements separately 
once the dependency problem is resolved.

http://gerrit.cloudera.org:8080/#/c/17869/3/be/src/exprs/aggregate-functions-ir.cc
File be/src/exprs/aggregate-functions-ir.cc:

http://gerrit.cloudera.org:8080/#/c/17869/3/be/src/exprs/aggregate-functions-ir.cc@1689
PS3, Line 1689:   agg_state_ptr->second = new 
(ctx->Allocate<datasketches::hll_sketch>())
              :       datasketches::hll_sketch(DS_SKETCH_CONFIG, DS_HLL_TYPE);
> I agree that it is a great improvement as it is.
If the processing can start from merge, then indeed we can do lazy 
initialization, but let's not worry about this right now.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I8dd0e6736f4266f74f5f265f58d40a4e4707287f
Gerrit-Change-Number: 17869
Gerrit-PatchSet: 3
Gerrit-Owner: Alexander Saydakov <al...@apache.org>
Gerrit-Reviewer: Alexander Saydakov <al...@apache.org>
Gerrit-Reviewer: Csaba Ringhofer <csringho...@cloudera.com>
Gerrit-Reviewer: Fucun Chu <chufu...@hotmail.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Comment-Date: Wed, 08 Dec 2021 20:43:19 +0000
Gerrit-HasComments: Yes

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