Riza Suminto has uploaded this change for review. ( 
http://gerrit.cloudera.org:8080/19491


Change subject: IMPALA-11914: Fix broken verbose explain on MT_DOP > 0
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IMPALA-11914: Fix broken verbose explain on MT_DOP > 0

When running with MT_DOP>0, EXPLAIN_LEVEL=VERBOSE will produce broken
explain string on fragment consuming input from join build fragment. It
will continue printing the explain plan for that child frament, the join
build fragment, rather than skipping it. This patch fix the issue by
skipping such children fragment.

Testing:
- Add PlannerTests.testExplainVerboseMtDop

Change-Id: Iad082074933204daaba0c675abb34c144e12c3f7
---
M fe/src/main/java/org/apache/impala/planner/PlanNode.java
M fe/src/test/java/org/apache/impala/planner/PlannerTest.java
A 
testdata/workloads/functional-planner/queries/PlannerTest/explain-verbose-mt_dop.test
3 files changed, 2,464 insertions(+), 0 deletions(-)



  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/91/19491/1
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newchange
Gerrit-Change-Id: Iad082074933204daaba0c675abb34c144e12c3f7
Gerrit-Change-Number: 19491
Gerrit-PatchSet: 1
Gerrit-Owner: Riza Suminto <[email protected]>

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