Jim Apple has posted comments on this change.

Change subject: IMPALA-2878: Remove unused function and duplicate codes.
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Patch Set 2:

(3 comments)

http://gerrit.cloudera.org:8080/#/c/3311/2/be/src/exprs/string-functions-ir.cc
File be/src/exprs/string-functions-ir.cc:

Line 808:   std::function<char* (unsigned)> allocator = [&](unsigned 
size)->char* {
This feels a little heavyweight. What about breaking impala::Base64Encode up 
into two functions - one (maybe Base64EncodeLength) that describes the length 
of the output string. Then this function can do the allocation directly, 
without lambdas.


http://gerrit.cloudera.org:8080/#/c/3311/2/be/src/util/url-coding-test.cc
File be/src/util/url-coding-test.cc:

Line 55
It's OK to have a base64decode function that is only used in testing.


http://gerrit.cloudera.org:8080/#/c/3311/2/be/src/util/url-coding.h
File be/src/util/url-coding.h:

Line 41: enum class Base64EncodeStatus { ENCODE_OK, INVALID_LEN, ENCODE_FAIL };
Please add a note here explaining what ENCODE_FAIL means - is it all other 
failure modes other than INVALID_LEN? What are those failure modes?


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Gerrit-MessageType: comment
Gerrit-Change-Id: Ica8f61fce7af16aa859f71d0763303e8d832ddcd
Gerrit-PatchSet: 2
Gerrit-Project: Impala
Gerrit-Branch: cdh5-trunk
Gerrit-Owner: Yuanhao Luo <[email protected]>
Gerrit-Reviewer: Jim Apple <[email protected]>
Gerrit-Reviewer: Yuanhao Luo <[email protected]>
Gerrit-HasComments: Yes

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