Impala Public Jenkins has submitted this change and it was merged. ( 
http://gerrit.cloudera.org:8080/18413 )

Change subject: IMPALA-11205: Implement Statistical functions: CORR(), 
COVAR_SAMP()  and COVAR_POP()
......................................................................

IMPALA-11205: Implement Statistical functions: CORR(), COVAR_SAMP()
 and COVAR_POP()

CORR() function takes two numeric type columns as arguments and returns
the Pearson's correlation coefficient between them.
COVAR_SAMP() function takes two numeric type columns and returns sample
 covariance between them.
COVAR_POP() function takes two numeric type columns and returns
 population covariance between them.
These UDAFs are tested with a few query tests written in aggregation.test.

Change-Id: I32ad627c953ba24d9cde2d5549bdd0d27a9c0d06
Reviewed-on: http://gerrit.cloudera.org:8080/18413
Reviewed-by: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Tested-by: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
---
M be/src/exprs/aggregate-functions-ir.cc
M be/src/exprs/aggregate-functions.h
M fe/src/main/java/org/apache/impala/catalog/BuiltinsDb.java
M testdata/workloads/functional-query/queries/QueryTest/aggregation.test
4 files changed, 1,074 insertions(+), 0 deletions(-)

Approvals:
  Impala Public Jenkins: Looks good to me, approved; Verified

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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: merged
Gerrit-Change-Id: I32ad627c953ba24d9cde2d5549bdd0d27a9c0d06
Gerrit-Change-Number: 18413
Gerrit-PatchSet: 30
Gerrit-Owner: Anonymous Coward <pranav.lo...@cloudera.com>
Gerrit-Reviewer: Anonymous Coward <pranav.lo...@cloudera.com>
Gerrit-Reviewer: Gergely Fürnstáhl <gfurnst...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <impala-public-jenk...@cloudera.com>
Gerrit-Reviewer: Jian Zhang <zjsar...@gmail.com>
Gerrit-Reviewer: Kurt Deschler <kdesc...@cloudera.com>
Gerrit-Reviewer: Quanlong Huang <huangquanl...@gmail.com>

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