Tim Armstrong has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/14716 )

Change subject: IMPALA-9126: part 2: no hj probe structures in build
......................................................................


Patch Set 4:

(1 comment)

http://gerrit.cloudera.org:8080/#/c/14716/4/be/src/exec/partitioned-hash-join-builder.cc
File be/src/exec/partitioned-hash-join-builder.cc:

http://gerrit.cloudera.org:8080/#/c/14716/4/be/src/exec/partitioned-hash-join-builder.cc@414
PS4, Line 414:   bool need_read_buffer = ht_ctx_->level() > 0;
I thought this was a bug, because we need a read buffer when we're probing a 
single spilled partition, even if that partition's level is 0.

But actually it works for a non-obvious reason - we don't currently call this 
function when we're probing a single spilled partition. Changed the code around 
so this is more explicit.



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I0065f7f44f44f02b7616b1f694178ca42341c42d
Gerrit-Change-Number: 14716
Gerrit-PatchSet: 4
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Comment-Date: Tue, 19 Nov 2019 22:44:57 +0000
Gerrit-HasComments: Yes

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