[kudu-CR] KUDU-1938 Add non-copy setters to partial row pt 3

["Attila Bukor (Code Review)" <ge...@cloudera.org>]

Hello Kudu Jenkins, Adar Dembo, Todd Lipcon, 

I'd like you to reexamine a change. Please visit

    http://gerrit.cloudera.org:8080/13928

to look at the new patch set (#4).

Change subject: KUDU-1938 Add non-copy setters to partial row pt 3
......................................................................

KUDU-1938 Add non-copy setters to partial row pt 3

Apache Impala uses KuduPartialRow API to determine which partition a row
will be inserted to distribute the data between executors optimally.

For this purpose the copy is unnecessary and it should be fast. This
commit adds NoCopyUnsafe variants for this purpose which expect the data
to already be truncated (which it is in Impala's case) and only check
that the value's length is lower than the highest possible upper bound:
val.size() < max_length*4 bytes (the maximum size of an UTF8 character)
to avoid having to count each character manually.

Change-Id: I1f2aba098d649eb94e0314f6606cc33600e8d766
---
M src/kudu/common/partial_row-test.cc
M src/kudu/common/partial_row.cc
M src/kudu/common/partial_row.h
3 files changed, 128 insertions(+), 0 deletions(-)


  git pull ssh://gerrit.cloudera.org:29418/kudu refs/changes/28/13928/4
-- 
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Gerrit-Project: kudu
Gerrit-Branch: master
Gerrit-MessageType: newpatchset
Gerrit-Change-Id: I1f2aba098d649eb94e0314f6606cc33600e8d766
Gerrit-Change-Number: 13928
Gerrit-PatchSet: 4
Gerrit-Owner: Attila Bukor <ab...@apache.org>
Gerrit-Reviewer: Adar Dembo <ad...@cloudera.com>
Gerrit-Reviewer: Attila Bukor <ab...@apache.org>
Gerrit-Reviewer: Kudu Jenkins (120)
Gerrit-Reviewer: Todd Lipcon <to...@apache.org>