Hello Vuk Ercegovac,

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

    http://gerrit.cloudera.org:8080/9139

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

Change subject: IMPALA-6228: Control stats extrapolation via tbl prop.
......................................................................

IMPALA-6228: Control stats extrapolation via tbl prop.

Introduces a new TBLPROPERTY for controlling stats
extrapolation on a per-table basis:

impala.enable.stats.extrapolation=true/false

The property key was chosen to be consistent with
the impalad startup flag --enable_stats_extrapolation
and to indicate that the property was set and is used
by Impala.

Behavior:
- If the property is not set, then the extrapolation
  behavior is determined by the impalad startup flag.
- If the property is set, it overrides the impalad
  startup flag, i.e., extrapolation can be explicitly
  enabled or disabled regardless of the startup flag.

Testing:
- added new unit tests
- code/hdfs run passed

Change-Id: Ie49597bf1b93b7572106abc620d91f199cba0cfd
---
M fe/src/main/java/org/apache/impala/analysis/ComputeStatsStmt.java
M fe/src/main/java/org/apache/impala/catalog/HdfsTable.java
M fe/src/main/java/org/apache/impala/planner/HdfsScanNode.java
M fe/src/main/java/org/apache/impala/service/BackendConfig.java
M fe/src/test/java/org/apache/impala/analysis/AnalyzeDDLTest.java
M fe/src/test/java/org/apache/impala/planner/StatsExtrapolationTest.java
M testdata/workloads/functional-query/queries/QueryTest/stats-extrapolation.test
M tests/custom_cluster/test_stats_extrapolation.py
A tests/metadata/test_stats_extrapolation.py
9 files changed, 329 insertions(+), 278 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/39/9139/4
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Ie49597bf1b93b7572106abc620d91f199cba0cfd
Gerrit-Change-Number: 9139
Gerrit-PatchSet: 4
Gerrit-Owner: Alex Behm <alex.b...@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com>
Gerrit-Reviewer: Vuk Ercegovac <vercego...@cloudera.com>

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