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[ARROW-694] [C++] Build JSON "scanner" for reading record batches from line-delimited JSON files - Arrow - [issue]
...Umbrella issue for using RapidJSON to parse JSON files to Arrow record batches...    Author: Wes McKinney , 2019-02-15, 23:31
[ARROW-4313] Define general benchmark database schema - Arrow - [issue]
...Some possible attributes that the benchmark database should track, to permit heterogeneity of hardware and programming languages Timestamp of benchmark run Git commit hash of codebase Machin...    Author: Wes McKinney , 2019-02-15, 22:03
[ARROW-4341] [C++] Use TypedBufferBuilder<bool> in BooleanBuilder - Arrow - [issue]
...Follow up work to ARROW-4031...    Author: Wes McKinney , 2019-02-15, 21:39
Making a 0.12.1 release - Arrow - [mail # dev]
...hi Uwe,This sounds like a good idea to me. I suggest creating a maint-0.12.xbranch where we can cherry-pick the patches we want to include in therelease. There may be some other bug fixes si...
   Author: Wes McKinney , 2019-02-15, 19:10
Enabling MATLAB testing in Travis CI - Arrow - [mail # dev]
...hi Hatem,I don't think the Arrow PMC can unilaterally enter into suchagreements. Please open a ticket with INFRA on the ASF JIRA and see ifthe Apache Software Foundation would be willing to ...
   Author: Wes McKinney , 2019-02-15, 17:21
[ARROW-2627] [Python] Add option (or some equivalent) to toggle memory mapping functionality when using parquet.ParquetFile or other read entry points - Arrow - [issue]
...See issue described in When passing a filename to parquet.ParquetFile, one cannot control what kind of file reader internally is created (OSFile ...    Author: Wes McKinney , 2019-02-15, 15:51
[ARROW-4547] [Python][Documentation] Update python/development.rst with instructions for CUDA-enabled builds - Arrow - [issue]
...Building a CUDA-enabled install is not documented...    Author: Wes McKinney , 2019-02-15, 08:38
[ARROW-4581] [C++] gbenchmark_ep is a dependency of unit tests when ARROW_BUILD_BENCHMARKS=ON - Arrow - [issue]
...I hit this issue when trying to use clang-7 from conda-forge, and wasn't sure why gbenchmark_ep is getting built when I'm building only a single unit test executable like arrow-array-testhtt...    Author: Wes McKinney , 2019-02-15, 05:22
[ARROW-4110] [C++] Do not generate distinct cast kernels when input and output type are the same - Arrow - [issue]
...A side issue brought up by ARROW-4101 and ARROW-4102 is that the "identity cast" is handled on a type-by-type basis. We should see if we can have a "universal identity cast" and simplify thi...    Author: Wes McKinney , 2019-02-15, 05:01
[ARROW-1896] [C++] Do not allocate memory for primitive outputs in CastKernel::Call implementation - Arrow - [issue]
...This is some refactoring / tidying. Unless an output of cast has a non-determinate size (e.g. is Binary or something else), the CastKernel::Call implementation should assume that it is writi...    Author: Wes McKinney , 2019-02-15, 04:56