Michael Ho has posted comments on this change. ( 
http://gerrit.cloudera.org:8080/12257 )

Change subject: IMPALA-8097: mt_dop for all queries via hidden flag
......................................................................


Patch Set 3:

(4 comments)

http://gerrit.cloudera.org:8080/#/c/12257/3//COMMIT_MSG
Commit Message:

http://gerrit.cloudera.org:8080/#/c/12257/3//COMMIT_MSG@13
PS3, Line 13: because these are not executable.
Would you mind elaborating for latter references ?


http://gerrit.cloudera.org:8080/#/c/12257/3/be/src/exec/blocking-join-node.cc
File be/src/exec/blocking-join-node.cc:

http://gerrit.cloudera.org:8080/#/c/12257/3/be/src/exec/blocking-join-node.cc@206
PS3, Line 206: && state->query_options().mt_dop == 0
Seems better to do this check before trying to acquire the thread token. 
Otherwise, we would leak the token.


http://gerrit.cloudera.org:8080/#/c/12257/3/be/src/runtime/coordinator.cc
File be/src/runtime/coordinator.cc:

http://gerrit.cloudera.org:8080/#/c/12257/3/be/src/runtime/coordinator.cc@a108
PS3, Line 108:
Do you recall what the limitation was ?


http://gerrit.cloudera.org:8080/#/c/12257/3/fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java
File fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java:

http://gerrit.cloudera.org:8080/#/c/12257/3/fe/src/main/java/org/apache/impala/planner/SingleNodePlanner.java@161
PS3, Line 161:    * - MT_DOP > 0 is not supported for plans with base table 
joins or table sinks.
             :    * Throws a NotImplementedException if plan validation fails.
Comments need updating



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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: comment
Gerrit-Change-Id: I72f0b02a005e8bf22fd17b8fb5aabf8c0d9b6b15
Gerrit-Change-Number: 12257
Gerrit-PatchSet: 3
Gerrit-Owner: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Michael Ho <k...@cloudera.com>
Gerrit-Comment-Date: Fri, 25 Jan 2019 21:55:31 +0000
Gerrit-HasComments: Yes

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