Hello Taras Bobrovytsky, Michael Brown, Tim Armstrong, Alex Behm, Dan Hecht,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/6023
to look at the new patch set (#16).
Change subject: IMPALA-4848: Add WIDTH_BUCKET() function
......................................................................
IMPALA-4848: Add WIDTH_BUCKET() function
Syntax :
width_bucket(expr decimal, min_val decimal, max_val decimal,
num_buckets int)
This function creates equiwidth histograms , where the histogram range
is divided into num_buckets buckets having identical sizes. This
function returns the bucket in which the expr value would fall. min_val
and max_val are the minimum and maximum value of the histogram range
respectively.
-> This function returns NULL if expr is a NULL.
-> This function returns 0 if expr < min_val
-> This function returns num_buckets + 1 if expr > max_val
E.g.
[localhost:21000] > select width_bucket(8, 1, 20, 3);
+---------------------------+
| width_bucket(8, 1, 20, 3) |
+---------------------------+
| 2 |
+---------------------------+
Change-Id: I081bc916b1bef7b929ca161a9aade3b54c6b858f
---
M be/src/exprs/expr-test.cc
M be/src/exprs/math-functions-ir.cc
M be/src/exprs/math-functions.h
M be/src/util/string-util.cc
M be/src/util/string-util.h
M common/function-registry/impala_functions.py
M fe/src/main/java/org/apache/impala/analysis/Expr.java
7 files changed, 246 insertions(+), 7 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/23/6023/16
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I081bc916b1bef7b929ca161a9aade3b54c6b858f
Gerrit-Change-Number: 6023
Gerrit-PatchSet: 16
Gerrit-Owner: anujphadke <apha...@cloudera.com>
Gerrit-Reviewer: Alex Behm <alex.b...@cloudera.com>
Gerrit-Reviewer: Dan Hecht <dhe...@cloudera.com>
Gerrit-Reviewer: Michael Brown <mi...@cloudera.com>
Gerrit-Reviewer: Taras Bobrovytsky <tbobrovyt...@cloudera.com>
Gerrit-Reviewer: Tim Armstrong <tarmstr...@cloudera.com>
Gerrit-Reviewer: anujphadke <apha...@cloudera.com>
