Hello Michael Ho, Jim Apple, Attila Jeges, Impala Public Jenkins,
I'd like you to reexamine a change. Please visit
http://gerrit.cloudera.org:8080/8355
to look at the new patch set (#15).
Change subject: IMPALA-5754: Improve randomness of rand()/random()
......................................................................
IMPALA-5754: Improve randomness of rand()/random()
Currently implementation of rand/random built-in functions
use rand_r of C library. We recognized its randomness was poor.
pcg32 of third party library shows better randomness than rand_r.
Testing:
Revise unit test in expr-test
Add E2E test to random.test
Change-Id: Idafdd5fe7502ff242c76a91a815c565146108684
---
M LICENSE.txt
M be/src/exprs/expr-test.cc
M be/src/exprs/math-functions-ir.cc
A be/src/thirdparty/pcg-cpp-0.98/LICENSE.txt
A be/src/thirdparty/pcg-cpp-0.98/README.md
A be/src/thirdparty/pcg-cpp-0.98/include/pcg_extras.hpp
A be/src/thirdparty/pcg-cpp-0.98/include/pcg_random.hpp
A be/src/thirdparty/pcg-cpp-0.98/include/pcg_uint128.hpp
M testdata/workloads/functional-query/queries/QueryTest/alloc-fail-init.test
A testdata/workloads/functional-query/queries/QueryTest/random.test
M tests/query_test/test_queries.py
11 files changed, 3,454 insertions(+), 31 deletions(-)
git pull ssh://gerrit.cloudera.org:29418/Impala-ASF refs/changes/55/8355/15
--
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Gerrit-Project: Impala-ASF
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: Idafdd5fe7502ff242c76a91a815c565146108684
Gerrit-Change-Number: 8355
Gerrit-PatchSet: 15
Gerrit-Owner: Kim Jin Chul <jinc...@gmail.com>
Gerrit-Reviewer: Attila Jeges <atti...@cloudera.com>
Gerrit-Reviewer: Impala Public Jenkins
Gerrit-Reviewer: Jim Apple <jbapple-imp...@apache.org>
Gerrit-Reviewer: Kim Jin Chul <jinc...@gmail.com>
Gerrit-Reviewer: Michael Ho <k...@cloudera.com>
