[email protected] 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 -- To view, visit http://gerrit.cloudera.org:8080/19569 To unsubscribe, visit http://gerrit.cloudera.org:8080/settings 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 <[email protected]> Gerrit-Reviewer: Anonymous Coward <[email protected]> Gerrit-Reviewer: Daniel Becker <[email protected]> Gerrit-Reviewer: Impala Public Jenkins <[email protected]> Gerrit-Reviewer: Quanlong Huang <[email protected]>
