CHANGELOG.md

Apache Arrow 0.2.0 (15 February 2017)

Bug

• ARROW-112 - [C++] Style fix for constants/enums
• ARROW-202 - [C++] Integrate with appveyor ci for windows support and get arrow building on windows
• ARROW-220 - [C++] Build conda artifacts in a build environment with better cross-linux ABI compatibility
• ARROW-224 - [C++] Address static linking of boost dependencies
• ARROW-230 - Python: Do not name modules like native ones (i.e. rename pyarrow.io)
• ARROW-239 - [Python] HdfsFile.read called with no arguments should read remainder of file
• ARROW-261 - [C++] Refactor BinaryArray/StringArray classes to not inherit from ListArray
• ARROW-275 - Add tests for UnionVector in Arrow File
• ARROW-294 - [C++] Do not use fopen / fclose / etc. methods for memory mapped file implementation
• ARROW-322 - [C++] Do not build HDFS IO interface optionally
• ARROW-323 - [Python] Opt-in to PyArrow parquet build rather than skipping silently on failure
• ARROW-334 - [Python] OS X rpath issues on some configurations
• ARROW-337 - UnionListWriter.list() is doing more than it should, this can cause data corruption
• ARROW-339 - Make merge_arrow_pr script work with Python 3
• ARROW-340 - [C++] Opening a writeable file on disk that already exists does not truncate to zero
• ARROW-342 - Set Python version on release
• ARROW-345 - libhdfs integration doesn't work for Mac
• ARROW-346 - Python API Documentation
• ARROW-348 - [Python] CMake build type should be configurable on the command line
• ARROW-349 - Six is missing as a requirement in the python setup.py
• ARROW-351 - Time type has no unit
• ARROW-354 - Connot compare an array of empty strings to another
• ARROW-357 - Default Parquet chunk_size of 64k is too small
• ARROW-358 - [C++] libhdfs can be in non-standard locations in some Hadoop distributions
• ARROW-362 - Python: Calling to_pandas on a table read from Parquet leaks memory
• ARROW-371 - Python: Table with null timestamp becomes float in pandas
• ARROW-375 - columns parameter in parquet.read_table() raises KeyError for valid column
• ARROW-384 - Align Java and C++ RecordBatch data and metadata layout
• ARROW-386 - [Java] Respect case of struct / map field names
• ARROW-387 - [C++] arrow::io::BufferReader does not permit shared memory ownership in zero-copy reads
• ARROW-390 - C++: CMake fails on json-integration-test with ARROW_BUILD_TESTS=OFF
• ARROW-392 - Fix string/binary integration tests
• ARROW-393 - [JAVA] JSON file reader fails to set the buffer size on String data vector
• ARROW-395 - Arrow file format writes record batches in reverse order.
• ARROW-398 - [Java] Java file format requires bitmaps of all 1's to be written when there are no nulls
• ARROW-399 - [Java] ListVector.loadFieldBuffers ignores the ArrowFieldNode length metadata
• ARROW-400 - [Java] ArrowWriter writes length 0 for Struct types
• ARROW-401 - [Java] Floating point vectors should do an approximate comparison in integration tests
• ARROW-402 - [Java] "refCnt gone negative" error in integration tests
• ARROW-403 - [JAVA] UnionVector: Creating a transfer pair doesn't transfer the schema to destination vector
• ARROW-404 - [Python] Closing an HdfsClient while there are still open file handles results in a crash
• ARROW-405 - [C++] Be less stringent about finding include/hdfs.h in HADOOP_HOME
• ARROW-406 - [C++] Large HDFS reads must utilize the set file buffer size when making RPCs
• ARROW-408 - [C++/Python] Remove defunct conda recipes
• ARROW-414 - [Java] "Buffer too large to resize to ..." error
• ARROW-420 - Align Date implementation between Java and C++
• ARROW-421 - [Python] Zero-copy buffers read by pyarrow::PyBytesReader must retain a reference to the parent PyBytes to avoid premature garbage collection issues
• ARROW-422 - C++: IPC should depend on rapidjson_ep if RapidJSON is vendored
• ARROW-429 - git-archive SHA-256 checksums are changing
• ARROW-433 - [Python] Date conversion is locale-dependent
• ARROW-434 - Segfaults and encoding issues in Python Parquet reads
• ARROW-435 - C++: Spelling mistake in if(RAPIDJSON_VENDORED)
• ARROW-437 - [C++] clang compiler warnings from overridden virtual functions
• ARROW-445 - C++: arrow_ipc is built before arrow/ipc/Message_generated.h was generated
• ARROW-447 - Python: Align scalar/pylist string encoding with pandas' one.
• ARROW-455 - [C++] BufferOutputStream dtor does not call Close()
• ARROW-469 - C++: Add option so that resize doesn't decrease the capacity
• ARROW-481 - [Python] Fix Python 2.7 regression in patch for PARQUET-472
• ARROW-486 - [C++] arrow::io::MemoryMappedFile can't be casted to arrow::io::FileInterface
• ARROW-487 - Python: ConvertTableToPandas segfaults if ObjectBlock::Write fails
• ARROW-494 - [C++] When MemoryMappedFile is destructed, memory is unmapped even if buffer referecnes still exist
• ARROW-499 - Update file serialization to use streaming serialization format
• ARROW-505 - [C++] Fix compiler warnings in release mode
• ARROW-511 - [Python] List[T] conversions not implemented for single arrays
• ARROW-513 - [C++] Fix Appveyor build
• ARROW-519 - [C++] Missing vtable in libarrow.dylib on Xcode 6.4
• ARROW-523 - Python: Account for changes in PARQUET-834
• ARROW-533 - [C++] arrow::TimestampArray / TimeArray has a broken constructor
• ARROW-535 - [Python] Add type mapping for NPY_LONGLONG
• ARROW-537 - [C++] StringArray/BinaryArray comparisons may be incorrect when values with non-zero length are null
• ARROW-540 - [C++] Fix build in aftermath of ARROW-33
• ARROW-543 - C++: Lazily computed null_counts counts number of non-null entries
• ARROW-544 - [C++] ArrayLoader::LoadBinary fails for length-0 arrays
• ARROW-545 - [Python] Ignore files without .parq or .parquet prefix when reading directory of files
• ARROW-548 - [Python] Add nthreads option to pyarrow.Filesystem.read_parquet
• ARROW-551 - C++: Construction of Column with nullptr Array segfaults
• ARROW-556 - [Integration] Can not run Integration tests if different cpp build path
• ARROW-561 - Update java & python dependencies to improve downstream packaging experience

Improvement

• ARROW-189 - C++: Use ExternalProject to build thirdparty dependencies
• ARROW-191 - Python: Provide infrastructure for manylinux1 wheels
• ARROW-328 - [C++] Return shared_ptr by value instead of const-ref?
• ARROW-330 - [C++] CMake functions to simplify shared / static library configuration
• ARROW-333 - Make writers update their internal schema even when no data is written.
• ARROW-335 - Improve Type apis and toString() by encapsulating flatbuffers better
• ARROW-336 - Run Apache Rat in Travis builds
• ARROW-338 - [C++] Refactor IPC vector "loading" and "unloading" to be based on cleaner visitor pattern
• ARROW-350 - Add Kerberos support to HDFS shim
• ARROW-355 - Add tests for serialising arrays of empty strings to Parquet
• ARROW-356 - Add documentation about reading Parquet
• ARROW-360 - C++: Add method to shrink PoolBuffer using realloc
• ARROW-361 - Python: Support reading a column-selection from Parquet files
• ARROW-365 - Python: Provide Array.to_pandas()
• ARROW-366 - [java] implement Dictionary vector
• ARROW-374 - Python: clarify unicode vs. binary in API
• ARROW-379 - Python: Use setuptools_scm/setuptools_scm_git_archive to provide the version number
• ARROW-380 - [Java] optimize null count when serializing vectors.
• ARROW-382 - Python: Extend API documentation
• ARROW-396 - Python: Add pyarrow.schema.Schema.equals
• ARROW-409 - Python: Change pyarrow.Table.dataframe_from_batches API to create Table instead
• ARROW-411 - [Java] Move Intergration.compare and Intergration.compareSchemas to a public utils class
• ARROW-423 - C++: Define BUILD_BYPRODUCTS in external project to support non-make CMake generators
• ARROW-425 - Python: Expose a C function to convert arrow::Table to pyarrow.Table
• ARROW-426 - Python: Conversion from pyarrow.Array to a Python list
• ARROW-430 - Python: Better version handling
• ARROW-432 - [Python] Avoid unnecessary memory copy in to_pandas conversion by using low-level pandas internals APIs
• ARROW-450 - Python: Fixes for PARQUET-818
• ARROW-457 - Python: Better control over memory pool
• ARROW-458 - Python: Expose jemalloc MemoryPool
• ARROW-463 - C++: Support jemalloc 4.x
• ARROW-466 - C++: ExternalProject for jemalloc
• ARROW-468 - Python: Conversion of nested data in pd.DataFrames to/from Arrow structures
• ARROW-474 - Create an Arrow streaming file fomat
• ARROW-479 - Python: Test for expected schema in Pandas conversion
• ARROW-485 - [Java] Users are required to initialize VariableLengthVectors.offsetVector before calling VariableLengthVectors.mutator.getSafe
• ARROW-490 - Python: Update manylinux1 build scripts
• ARROW-524 - [java] provide apis to access nested vectors and buffers
• ARROW-525 - Python: Add more documentation to the package
• ARROW-529 - Python: Add jemalloc and Python 3.6 to manylinux1 build
• ARROW-546 - Python: Account for changes in PARQUET-867
• ARROW-553 - C++: Faster valid bitmap building

New Feature

• ARROW-108 - [C++] Add IPC round trip for union types
• ARROW-221 - Add switch for writing Parquet 1.0 compatible logical types
• ARROW-227 - [C++/Python] Hook arrow_io generic reader / writer interface into arrow_parquet
• ARROW-228 - [Python] Create an Arrow-cpp-compatible interface for reading bytes from Python file-like objects
• ARROW-243 - [C++] Add "driver" option to HdfsClient to choose between libhdfs and libhdfs3 at runtime
• ARROW-303 - [C++] Also build static libraries for leaf libraries
• ARROW-312 - [Python] Provide Python API to read/write the Arrow IPC file format
• ARROW-317 - [C++] Implement zero-copy Slice method on arrow::Buffer that retains reference to parent
• ARROW-33 - C++: Implement zero-copy array slicing
• ARROW-332 - [Python] Add helper function to convert RecordBatch to pandas.DataFrame
• ARROW-363 - Set up Java/C++ integration test harness
• ARROW-369 - [Python] Add ability to convert multiple record batches at once to pandas
• ARROW-373 - [C++] Implement C++ version of JSON file format for testing
• ARROW-377 - Python: Add support for conversion of Pandas.Categorical
• ARROW-381 - [C++] Simplify primitive array type builders to use a default type singleton
• ARROW-383 - [C++] Implement C++ version of ARROW-367 integration test validator
• ARROW-389 - Python: Write Parquet files to pyarrow.io.NativeFile objects
• ARROW-394 - Add integration tests for boolean, list, struct, and other basic types
• ARROW-410 - [C++] Add Flush method to arrow::io::OutputStream
• ARROW-415 - C++: Add Equals implementation to compare Tables
• ARROW-416 - C++: Add Equals implementation to compare Columns
• ARROW-417 - C++: Add Equals implementation to compare ChunkedArrays
• ARROW-418 - [C++] Consolidate array container and builder code, remove arrow/types
• ARROW-419 - [C++] Promote util/{status.h, buffer.h, memory-pool.h} to top level of arrow/ source directory
• ARROW-427 - [C++] Implement dictionary-encoded array container
• ARROW-428 - [Python] Deserialize from Arrow record batches to pandas in parallel using a thread pool
• ARROW-438 - [Python] Concatenate Table instances with equal schemas
• ARROW-440 - [C++] Support pkg-config
• ARROW-441 - [Python] Expose Arrow's file and memory map classes as NativeFile subclasses
• ARROW-442 - [Python] Add public Python API to inspect Parquet file metadata
• ARROW-444 - [Python] Avoid unnecessary memory copies from use of PyBytes_* C APIs
• ARROW-449 - Python: Conversion from pyarrow.{Table,RecordBatch} to a Python dict
• ARROW-456 - C++: Add jemalloc based MemoryPool
• ARROW-461 - [Python] Implement conversion between arrow::DictionaryArray and pandas.Categorical
• ARROW-467 - [Python] Run parquet-cpp unit tests in Travis CI
• ARROW-470 - [Python] Add "FileSystem" abstraction to access directories of files in a uniform way
• ARROW-471 - [Python] Enable ParquetFile to pass down separately-obtained file metadata
• ARROW-472 - [Python] Expose parquet::{SchemaDescriptor, ColumnDescriptor}::Equals
• ARROW-475 - [Python] High level support for reading directories of Parquet files (as a single Arrow table) from supported file system interfaces
• ARROW-476 - [Integration] Add integration tests for Binary / Varbytes type
• ARROW-477 - [Java] Add support for second/microsecond/nanosecond timestamps in-memory and in IPC/JSON layer
• ARROW-478 - [Python] Accept a PyBytes object in the pyarrow.io.BufferReader ctor
• ARROW-484 - Add more detail about what of technology can be found in the Arrow implementations to README
• ARROW-495 - [C++] Add C++ implementation of streaming serialized format
• ARROW-497 - [Java] Integration test harness for streaming format
• ARROW-498 - [C++] Integration test harness for streaming format
• ARROW-503 - [Python] Interface to streaming binary format
• ARROW-508 - [C++] Make file/memory-mapped file interfaces threadsafe
• ARROW-509 - [Python] Add support for PARQUET-835 (parallel column reads)
• ARROW-512 - C++: Add method to check for primitive types
• ARROW-514 - [Python] Accept pyarrow.io.Buffer as input to StreamReader, FileReader classes
• ARROW-515 - [Python] Add StreamReader/FileReader methods that read all record batches as a Table
• ARROW-521 - [C++/Python] Track peak memory use in default MemoryPool
• ARROW-531 - Python: Document jemalloc, extend Pandas section, add Getting Involved
• ARROW-538 - [C++] Set up AddressSanitizer (ASAN) builds
• ARROW-547 - [Python] Expose Array::Slice and RecordBatch::Slice
• ARROW-81 - [Format] Add a Category logical type (distinct from dictionary-encoding)

Task

• ARROW-268 - [C++] Flesh out union implementation to have all required methods for IPC
• ARROW-327 - [Python] Remove conda builds from Travis CI processes
• ARROW-353 - Arrow release 0.2
• ARROW-359 - Need to document ARROW_LIBHDFS_DIR
• ARROW-367 - [java] converter csv/json <=> Arrow file format for Integration tests
• ARROW-368 - Document use of LD_LIBRARY_PATH when using Python
• ARROW-372 - Create JSON arrow file format for integration tests
• ARROW-506 - Implement Arrow Echo server for integration testing
• ARROW-527 - clean drill-module.conf file
• ARROW-558 - Add KEYS files
• ARROW-96 - C++: API documentation using Doxygen
• ARROW-97 - Python: API documentation via sphinx-apidoc

Apache Arrow 0.1.0 (7 October 2016)

Bug

• ARROW-103 - Missing patterns from .gitignore
• ARROW-104 - Update Layout.md based on discussion on the mailing list
• ARROW-105 - Unit tests fail if assertions are disabled
• ARROW-113 - TestValueVector test fails if cannot allocate 2GB of memory
• ARROW-16 - Building cpp issues on XCode 7.2.1
• ARROW-17 - Set some vector fields to default access level for Drill compatibility
• ARROW-18 - Fix bug with decimal precision and scale
• ARROW-185 - [C++] Make sure alignment and memory padding conform to spec
• ARROW-188 - Python: Add numpy as install requirement
• ARROW-193 - For the instruction, typos "int his" should be "in this"
• ARROW-194 - C++: Allow read-only memory mapped source
• ARROW-200 - [Python] Convert Values String looks like it has incorrect error handling
• ARROW-209 - [C++] Broken builds: llvm.org apt repos are unavailable
• ARROW-210 - [C++] Tidy up the type system a little bit
• ARROW-211 - Several typos/errors in Layout.md examples
• ARROW-217 - Fix Travis w.r.t conda 4.1.0 changes
• ARROW-219 - [C++] Passed CMAKE_CXX_FLAGS are being dropped, fix compiler warnings
• ARROW-223 - Do not link against libpython
• ARROW-225 - [C++/Python] master Travis CI build is broken
• ARROW-244 - [C++] Some global APIs of IPC module should be visible to the outside
• ARROW-246 - [Java] UnionVector doesn't call allocateNew() when creating it's vectorType
• ARROW-247 - [C++] Missing explicit destructor in RowBatchReader causes an incomplete type error
• ARROW-250 - Fix for ARROW-246 may cause memory leaks
• ARROW-259 - Use flatbuffer fields in java implementation
• ARROW-265 - Negative decimal values have wrong padding
• ARROW-266 - [C++] Fix the broken build
• ARROW-274 - Make the MapVector nullable
• ARROW-278 - [Format] Struct type name consistency in implementations and metadata
• ARROW-283 - [C++] Update arrow_parquet to account for API changes in PARQUET-573
• ARROW-284 - [C++] Triage builds by disabling Arrow-Parquet module
• ARROW-287 - [java] Make nullable vectors use a BitVecor instead of UInt1Vector for bits
• ARROW-297 - Fix Arrow pom for release
• ARROW-304 - NullableMapReaderImpl.isSet() always returns true
• ARROW-308 - UnionListWriter.setPosition() should not call startList()
• ARROW-309 - Types.getMinorTypeForArrowType() does not work for Union type
• ARROW-313 - XCode 8.0 breaks builds
• ARROW-314 - JSONScalar is unnecessary and unused.
• ARROW-320 - ComplexCopier.copy(FieldReader, FieldWriter) should not start a list if reader is not set
• ARROW-321 - Fix Arrow licences
• ARROW-36 - Remove fixVersions from patch tool (until we have them)
• ARROW-46 - Port DRILL-4410 to Arrow
• ARROW-5 - Error when run maven install
• ARROW-51 - Move ValueVector test from Drill project
• ARROW-55 - Python: fix legacy Python (2.7) tests and add to Travis CI
• ARROW-62 - Format: Are the nulls bits 0 or 1 for null values?
• ARROW-63 - C++: ctest fails if Python 3 is the active Python interpreter
• ARROW-65 - Python: FindPythonLibsNew does not work in a virtualenv
• ARROW-69 - Change permissions for assignable users
• ARROW-72 - FindParquet searches for non-existent header
• ARROW-75 - C++: Fix handling of empty strings
• ARROW-77 - C++: conform null bit interpretation to match ARROW-62
• ARROW-80 - Segmentation fault on len(Array) for empty arrays
• ARROW-88 - C++: Refactor given PARQUET-572
• ARROW-93 - XCode 7.3 breaks builds
• ARROW-94 - Expand list example to clarify null vs empty list

Improvement

• ARROW-10 - Fix mismatch of javadoc names and method parameters
• ARROW-15 - Fix a naming typo for memory.AllocationManager.AllocationOutcome
• ARROW-190 - Python: Provide installable sdist builds
• ARROW-199 - [C++] Refine third party dependency
• ARROW-206 - [C++] Expose an equality API for arrays that compares a range of slots on two arrays
• ARROW-212 - [C++] Clarify the fact that PrimitiveArray is now abstract class
• ARROW-213 - Exposing static arrow build
• ARROW-218 - Add option to use GitHub API token via environment variable when merging PRs
• ARROW-234 - [C++] Build with libhdfs support in arrow_io in conda builds
• ARROW-238 - C++: InternalMemoryPool::Free() should throw an error when there is insufficient allocated memory
• ARROW-245 - [Format] Clarify Arrow's relationship with big endian platforms
• ARROW-252 - Add implementation guidelines to the documentation
• ARROW-253 - Int types should only have width of 8*2^n (8, 16, 32, 64)
• ARROW-254 - Remove Bit type as it is redundant with boolean
• ARROW-255 - Finalize Dictionary representation
• ARROW-256 - Add versioning to the arrow spec.
• ARROW-257 - Add a typeids Vector to Union type
• ARROW-264 - Create an Arrow File format
• ARROW-270 - [Format] Define more generic Interval logical type
• ARROW-271 - Update Field structure to be more explicit
• ARROW-279 - rename vector module to arrow-vector for consistency
• ARROW-280 - [C++] Consolidate file and shared memory IO interfaces
• ARROW-285 - Allow for custom flatc compiler
• ARROW-286 - Build thirdparty dependencies in parallel
• ARROW-289 - Install test-util.h
• ARROW-290 - Specialize alloc() in ArrowBuf
• ARROW-292 - [Java] Upgrade Netty to 4.041
• ARROW-299 - Use absolute namespace in macros
• ARROW-305 - Add compression and use_dictionary options to Parquet interface
• ARROW-306 - Add option to pass cmake arguments via environment variable
• ARROW-315 - Finalize timestamp type
• ARROW-319 - Add canonical Arrow Schema json representation
• ARROW-324 - Update arrow metadata diagram
• ARROW-325 - make TestArrowFile not dependent on timezone
• ARROW-50 - C++: Enable library builds for 3rd-party users without having to build thirdparty googletest
• ARROW-54 - Python: rename package to "pyarrow"
• ARROW-64 - Add zsh support to C++ build scripts
• ARROW-66 - Maybe some missing steps in installation guide
• ARROW-68 - Update setup_build_env and third-party script to be more userfriendly
• ARROW-71 - C++: Add script to run clang-tidy on codebase
• ARROW-73 - Support CMake 2.8
• ARROW-78 - C++: Add constructor for DecimalType
• ARROW-79 - Python: Add benchmarks
• ARROW-8 - Set up Travis CI
• ARROW-85 - C++: memcmp can be avoided in Equal when comparing with the same Buffer
• ARROW-86 - Python: Implement zero-copy Arrow-to-Pandas conversion
• ARROW-87 - Implement Decimal schema conversion for all ways supported in Parquet
• ARROW-89 - Python: Add benchmarks for Arrow<->Pandas conversion
• ARROW-9 - Rename some unchanged "Drill" to "Arrow"
• ARROW-91 - C++: First draft of an adapter class for parquet-cpp's ParquetFileReader that produces Arrow table/row batch objects

New Feature

• ARROW-100 - [C++] Computing RowBatch size
• ARROW-106 - Add IPC round trip for string types (string, char, varchar, binary)
• ARROW-107 - [C++] add ipc round trip for struct types
• ARROW-13 - Add PR merge tool similar to that used in Parquet
• ARROW-19 - C++: Externalize memory allocations and add a MemoryPool abstract interface to builder classes
• ARROW-197 - [Python] Add conda dev recipe for pyarrow
• ARROW-2 - Post Simple Website
• ARROW-20 - C++: Add null count member to Array containers, remove nullable member
• ARROW-201 - C++: Initial ParquetWriter implementation
• ARROW-203 - Python: Basic filename based Parquet read/write
• ARROW-204 - [Python] Automate uploading conda build artifacts for libarrow and pyarrow
• ARROW-21 - C++: Add in-memory schema metadata container
• ARROW-214 - C++: Add String support to Parquet I/O
• ARROW-215 - C++: Support other integer types in Parquet I/O
• ARROW-22 - C++: Add schema adapter routines for converting flat Parquet schemas to in-memory Arrow schemas
• ARROW-222 - [C++] Create prototype file-like interface to HDFS (via libhdfs) and begin defining more general IO interface for Arrow data adapters
• ARROW-23 - C++: Add logical "Column" container for chunked data
• ARROW-233 - [C++] Add visibility defines for limiting shared library symbol visibility
• ARROW-236 - [Python] Enable Parquet read/write to work with HDFS file objects
• ARROW-237 - [C++] Create Arrow specializations of Parquet allocator and read interfaces
• ARROW-24 - C++: Add logical "Table" container
• ARROW-242 - C++/Python: Support Timestamp Data Type
• ARROW-26 - C++: Add developer instructions for building parquet-cpp integration
• ARROW-262 - [Format] Add a new format document for metadata and logical types for messaging and IPC / on-wire/file representations
• ARROW-267 - [C++] C++ implementation of file-like layout for RPC / IPC
• ARROW-28 - C++: Add google/benchmark to the 3rd-party build toolchain
• ARROW-293 - [C++] Implementations of IO interfaces for operating system files
• ARROW-296 - [C++] Remove arrow_parquet C++ module and related parts of build system
• ARROW-3 - Post Initial Arrow Format Spec
• ARROW-30 - Python: pandas/NumPy to/from Arrow conversion routines
• ARROW-301 - [Format] Add some form of user field metadata to IPC schemas
• ARROW-302 - [Python] Add support to use the Arrow file format with file-like objects
• ARROW-31 - Python: basic PyList <-> Arrow marshaling code
• ARROW-318 - [Python] Revise README to reflect current state of project
• ARROW-37 - C++: Represent boolean array data in bit-packed form
• ARROW-4 - Initial Arrow CPP Implementation
• ARROW-42 - Python: Add to Travis CI build
• ARROW-43 - Python: Add rudimentary console repr for array types
• ARROW-44 - Python: Implement basic object model for scalar values (i.e. results of arrow_arr[i])
• ARROW-48 - Python: Add Schema object wrapper
• ARROW-49 - Python: Add Column and Table wrapper interface
• ARROW-53 - Python: Fix RPATH and add source installation instructions
• ARROW-56 - Format: Specify LSB bit ordering in bit arrays
• ARROW-57 - Format: Draft data headers IDL for data interchange
• ARROW-58 - Format: Draft type metadata ("schemas") IDL
• ARROW-59 - Python: Boolean data support for builtin data structures
• ARROW-60 - C++: Struct type builder API
• ARROW-67 - C++: Draft type metadata conversion to/from IPC representation
• ARROW-7 - Add Python library build toolchain
• ARROW-70 - C++: Add "lite" DCHECK macros used in parquet-cpp
• ARROW-76 - Revise format document to include null count, defer non-nullable arrays to the domain of metadata
• ARROW-82 - C++: Implement IPC exchange for List types
• ARROW-90 - Apache Arrow cpp code does not support power architecture
• ARROW-92 - C++: Arrow to Parquet Schema conversion

Task

• ARROW-1 - Import Initial Codebase
• ARROW-101 - Fix java warnings emitted by java compiler
• ARROW-102 - travis-ci support for java project
• ARROW-11 - Mirror JIRA activity to [email protected]
• ARROW-14 - Add JIRA components
• ARROW-251 - [C++] Expose APIs for getting code and message of the status
• ARROW-272 - Arrow release 0.1
• ARROW-298 - create release scripts
• ARROW-35 - Add a short call-to-action / how-to-get-involved to the main README.md

Test

• ARROW-260 - TestValueVector.testFixedVectorReallocation and testVariableVectorReallocation are flaky
• ARROW-83 - Add basic test infrastructure for DecimalType