[Impala-ASF-CR] IMPALA-11957: Implement Regression functions: regr slope(), regr intercept() and regr r2()

["Anonymous Coward (Code Review)" <ge...@cloudera.org>]

pranav.lodha@cloudera.com has uploaded a new patch set (#8). ( http://gerrit.cloudera.org:8080/19569 )

Change subject: IMPALA-11957: Implement Regression functions: regr_slope(), regr_intercept() and regr_r2()
......................................................................

IMPALA-11957: Implement Regression functions: regr_slope(),
regr_intercept() and regr_r2()

The linear regression functions fit an ordinary-least-squares regression
line to a set of number pairs. They can be used both as aggregate and
analytic functions.

regr_slope() takes two arguments of numeric type and returns the slope
of the line.
regr_intercept() takes two arguments of numeric type and returns the
y-intercept of the regression line.
regr_r2() takes two arguments of numeric type and returns the coefficient
of determination (also called R-squared or goodness of fit) for the
regression.

Testing:
The functions are extensively tested and cross-checked with Hive. The
tests can be found in aggregation.test.
Change-Id: Iab6bd84ae3e0c02ec924c30183308123b951caa3
---
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, 1,023 insertions(+), 2 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/69/19569/8
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Iab6bd84ae3e0c02ec924c30183308123b951caa3
Gerrit-Change-Number: 19569
Gerrit-PatchSet: 8
Gerrit-Owner: Anonymous Coward <pr...@cloudera.com>
Gerrit-Reviewer: Anonymous Coward <pr...@cloudera.com>
Gerrit-Reviewer: Daniel Becker <da...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins <im...@cloudera.com>
Gerrit-Reviewer: Quanlong Huang <hu...@gmail.com>