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From "Alex Behm (Code Review)" <>
Subject [Impala-ASF-CR] IMPALA-4572: Run COMPUTE STATS on Parquet tables with MT DOP&2E
Date Sat, 03 Dec 2016 17:46:16 GMT
Hello Internal Jenkins, Tim Armstrong,

I'd like you to reexamine a change.  Please visit

to look at the new patch set (#4).

Change subject: IMPALA-4572: Run COMPUTE STATS on Parquet tables with MT_DOP=4.

IMPALA-4572: Run COMPUTE STATS on Parquet tables with MT_DOP=4.

COMPUTE STATS on Parquet tables is run with MT_DOP=4 by default.
COMPUTE STATS on non-Parquet tables will run without MT_DOP.

Users can always override the behavior by setting MT_DOP manually.
Setting MT_DOP to 0 means a statement will be run in the
conventional execution mode (without intra-node paralellism based
on multiple fragment instances). Users can set a higher MT_DOP
even for Parquet tables.

Testing: Added a new test that checks the effective MT_DOP.
Locally ran,,,, and

Change-Id: I2be3c7c9f3004e9a759224a2e5756eb6e4efa359
M common/thrift/ImpalaInternalService.thrift
M fe/src/main/java/org/apache/impala/analysis/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/planner/
M fe/src/main/java/org/apache/impala/service/
M fe/src/test/java/org/apache/impala/planner/
M fe/src/test/java/org/apache/impala/planner/
M fe/src/test/java/org/apache/impala/service/
M tests/query_test/
9 files changed, 107 insertions(+), 11 deletions(-)

  git pull ssh:// refs/changes/15/5315/4
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Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I2be3c7c9f3004e9a759224a2e5756eb6e4efa359
Gerrit-PatchSet: 4
Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-Owner: Alex Behm <>
Gerrit-Reviewer: Alex Behm <>
Gerrit-Reviewer: Internal Jenkins
Gerrit-Reviewer: Marcel Kornacker <>
Gerrit-Reviewer: Tim Armstrong <>

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