v22.10.00

🚨 Breaking Changes

• Disable Zstandard decompression on nvCOMP 2.4 and Pascal GPus (#11856) @vuule
• Disable nvCOMP DEFLATE integration (#11811) @vuule
• Fix return type of Index.isna & Index.notna (#11769) @galipremsagar
• Remove kwargs in read_csv & to_csv (#11762) @galipremsagar
• Fix cudf::partition* APIs that do not return offsets for empty output table (#11709) @ttnghia
• Fix regex negated classes to not automatically include new-lines (#11644) @davidwendt
• Update zfill to match Python output (#11634) @davidwendt
• Upgrade pandas to 1.5 (#11617) @galipremsagar
• Change default value of ordered to False in CategoricalDtype (#11604) @galipremsagar
• Move cudf::strings::findall_record to cudf::strings::findall (#11575) @davidwendt
• Adding optional parquet reader schema (#11524) @hyperbolic2346
• Deprecate skiprows and num_rows in read_orc (#11522) @galipremsagar
• Remove support for skip_rows / num_rows options in the parquet reader. (#11503) @nvdbaranec
• Drop support for skiprows and num_rows in cudf.read_parquet (#11480) @galipremsagar
• Disable Arrow S3 support by default. (#11470) @bdice
• Convert thrust::optional usages to std::optional (#11455) @robertmaynard
• Remove unused is_struct trait. (#11450) @bdice
• Refactor the Buffer class (#11447) @madsbk
• Return empty dataframe when reading an ORC file using empty columns option (#11446) @vuule
• Refactor pad_side and strip_type enums into side_type enum (#11438) @davidwendt
• Remove HASH_SERIAL_MURMUR3 / serial32BitMurmurHash3 (#11383) @bdice
• Use the new JSON parser when the experimental reader is selected (#11364) @vuule
• Remove deprecated Series.applymap. (#11031) @bdice
• Remove deprecated expand parameter from str.findall. (#11030) @bdice

🐛 Bug Fixes

• Fixes bug in temporary decompression space estimation before calling nvcomp (#11879) @abellina
• Handle ptx file paths during strings_udf import (#11862) @galipremsagar
• Disable Zstandard decompression on nvCOMP 2.4 and Pascal GPus (#11856) @vuule
• Reset strings_udf CEC and solve several related issues (#11846) @brandon-b-miller
• Fix bug in new shuffle-based groupby implementation (#11836) @rjzamora
• Fix is_valid checks in Scalar._binaryop (#11818) @wence-
• Fix operator NotImplemented issue with numpy (#11816) @galipremsagar
• Disable nvCOMP DEFLATE integration (#11811) @vuule
• Build strings_udf package with other python packages in nightlies (#11808) @brandon-b-miller
• Revert problematic shuffle=explicit-comms changes (#11803) @rjzamora
• Fix regex out-of-bounds write in strided rows logic (#11797) @davidwendt
• Build cudf locally before building strings_udf conda packages in CI (#11785) @brandon-b-miller
• Fix an issue in cudf::row_bit_count involving structs and lists at multiple levels. (#11779) @nvdbaranec
• Fix return type of Index.isna & Index.notna (#11769) @galipremsagar
• Fix issue with set-item incase of list and struct types (#11760) @galipremsagar
• Ensure all libcudf APIs run on cudf's default stream (#11759) @vyasr
• Resolve dask_cudf failures caused by upstream groupby changes (#11755) @rjzamora
• Fix ORC string sum statistics (#11740) @vuule
• Add strings_udf package for python 3.9 (#11730) @brandon-b-miller
• Ensure that all tests launch kernels on cudf's default stream (#11726) @vyasr
• Don't assume stream is a compile-time constant expression (#11725) @vyasr
• Fix get_thrust.cmake format at patch command (#11715) @davidwendt
• Fix cudf::partition* APIs that do not return offsets for empty output table (#11709) @ttnghia
• Fix cudf::lists::sort_lists for NaN and Infinity values (#11703) @davidwendt
• Modify ORC reader timestamp parsing to match the apache reader behavior (#11699) @vuule
• Fix DataFrame.from_arrow to preserve type metadata (#11698) @galipremsagar
• Fix compile error due to missing header (#11697) @ttnghia
• Default to Snappy compression in to_orc when using cuDF or Dask (#11690) @vuule
• Fix an issue related to Multindex when group_keys=True (#11689) @galipremsagar
• Transfer correct dtype to exploded column (#11687) @wence-
• Ignore protobuf generated files in mypy checks (#11685) @galipremsagar
• Maintain the index name after .loc (#11677) @shwina
• Fix issue with extracting nested column data & dtype preservation (#11671) @galipremsagar
• Ensure that all cudf tests and benchmarks are conda env aware (#11666) @robertmaynard
• Update to Thrust 1.17.2 to fix cub ODR issues (#11665) @robertmaynard
• Fix multi-file remote datasource bug (#11655) @rjzamora
• Fix invalid regex quantifier check to not include alternation (#11654) @davidwendt
• Fix bug in device_write(): it uses an incorrect size (#11651) @madsbk
• fixes overflows in benchmarks (#11649) @elstehle
• Fix regex negated classes to not automatically include new-lines (#11644) @davidwendt
• Fix compile error in benchmark nested_json.cpp (#11637) @davidwendt
• Update zfill to match Python output (#11634) @davidwendt
• Removed converted type for INT32 and INT64 since they do not convert (#11627) @hyperbolic2346
• Fix host scalars construction of nested types (#11612) @galipremsagar
• Fix compile warning in nested_json_gpu.cu (#11607) @davidwendt
• Change default value of ordered to False in CategoricalDtype (#11604) @galipremsagar
• Preserve order if necessary when deduping categoricals internally (#11597) @brandon-b-miller
• Add is_timestamp test for leap second (60) (#11594) @davidwendt
• Fix an issue with to_arrow when column name type is not a string (#11590) @galipremsagar
• Fix exception in segmented-reduce benchmark (#11588) @davidwendt
• Fix encode/decode of negative timestamps in ORC reader/writer (#11586) @vuule
• Correct distribution data type in quantiles benchmark (#11584) @vuule
• Fix multibyte_split benchmark for host buffers (#11583) @upsj
• xfail custreamz display test for now (#11567) @shwina
• Fix JNI for TableWithMeta to use schema_info instead of column_names (#11566) @jlowe
• Reduce code duplication for dask & distributed nightly/stable installs (#11565) @galipremsagar
• Fix groupby failures in dask_cudf CI (#11561) @rjzamora
• Fix for pivot: error when 'values' is a multicharacter string (#11538) @shaswat-indian
• find_package(cudf) + arrow9 usable with cudf build directory (#11535) @robertmaynard
• Fixing crash when writing binary nested data in parquet (#11526) @hyperbolic2346
• Fix for: error when assigning a value to an empty series (#11523) @shaswat-indian
• Fix invalid results from conditional-left-anti-join in debug build (#11517) @davidwendt
• Fix cmake error after upgrading to Arrow 9 (#11513) @ttnghia
• Fix reverse binary operators acting on a host value and cudf.Scalar (#11512) @bdice
• Update parquet fuzz tests to drop support for skiprows & num_rows (#11505) @galipremsagar
• Use rapids-cmake 22.10 best practice for RAPIDS.cmake location (#11493) @robertmaynard
• Handle some zero-sized corner cases in dlpack interop (#11449) @wence-
• Return empty dataframe when reading an ORC file using empty columns option (#11446) @vuule
• libcudf c++ example updated to CPM version 0.35.3 (#11417) @robertmaynard
• Fix regex quantifier check to include capture groups (#11373) @davidwendt
• Fix read_text when byte_range is aligned with field (#11371) @upsj
• Fix to_timestamps truncated subsecond calculation (#11367) @davidwendt
• column: calculate null_count before release()ing the cudf::column (#11365) @wence-

📖 Documentation

• Update guide-to-udfs notebook (#11861) @brandon-b-miller
• Update docstring for cudf.read_text (#11799) @GregoryKimball
• Add doc section for list & struct handling (#11770) @galipremsagar
• Document that minimum required CMake version is now 3.23.1 (#11751) @robertmaynard
• Update libcudf documentation build command in DOCUMENTATION.md (#11735) @davidwendt
• Add docs for use of string data to DataFrame.apply and Series.apply and update guide to UDFs notebook (#11733) @brandon-b-miller
• Enable more Pydocstyle rules (#11582) @bdice
• Remove unused cpp/img folder (#11554) @davidwendt
• Publish C++ developer docs (#11475) @vyasr
• Fix a misalignment in cudf.get_dummies docstring (#11443) @galipremsagar
• Update contributing doc to include links to the developer guides (#11390) @davidwendt
• Fix table_view_base doxygen format (#11340) @davidwendt
• Create main developer guide for Python (#11235) @vyasr
• Add developer documentation for benchmarking (#11122) @vyasr
• cuDF error handling document (#7917) @isVoid

🚀 New Features

• Add hasNull statistic reading ability to ORC (#11747) @devavret
• Add istitle to string UDFs (#11738) @brandon-b-miller
• JSON Column creation in GPU (#11714) @karthikeyann
• Adds option to take explicit nested schema for nested JSON reader (#11682) @elstehle
• Add BGZIP data_chunk_reader (#11652) @upsj
• Support DECIMAL order-by for RANGE window functions (#11645) @mythrocks
• changing version of cmake to 3.23.3 (#11619) @hyperbolic2346
• Generate unique keys table in java JNI contiguousSplitGroups (#11614) @res-life
• Generic type casting to support the new nested JSON reader (#11613) @elstehle
• JSON tree traversal (#11610) @karthikeyann
• Add casting operators to masked UDFs (#11578) @brandon-b-miller
• Adds type inference and type conversion for leaf-columns to the nested JSON parser (#11574) @elstehle
• Add strings 'like' function (#11558) @davidwendt
• Handle hyphen as literal for regex cclass when incomplete range (#11557) @davidwendt
• Enable ZSTD compression in ORC and Parquet writers (#11551) @vuule
• Adds support for json lines format to the nested JSON reader (#11534) @elstehle
• Adding optional parquet reader schema (#11524) @hyperbolic2346
• Adds GPU implementation of JSON-token-stream to JSON-tree (#11518) @karthikeyann
• Add gdb pretty-printers for simple types (#11499) @upsj
• Add create_random_column function to the d...

v22.08.01

🚨 Breaking Changes

• Pin numpy to <1.23 (#11824) @galipremsagar
• Remove legacy join APIs (#11274) @vyasr
• Remove lists::drop_list_duplicates (#11236) @ttnghia
• Remove Index.replace API (#11131) @vyasr
• Remove deprecated Index methods from Frame (#11073) @vyasr
• Remove public API of cudf.merge_sorted. (#11032) @bdice
• Drop python 3.7 in code-base (#11029) @galipremsagar
• Return empty dataframe when reading a Parquet file using empty columns option (#11018) @vuule
• Remove Arrow CUDA IPC code (#10995) @shwina
• Buffer: make .ptr read-only (#10872) @madsbk

🐛 Bug Fixes

• Fix out-of-bound access in cudf::detail::label_segments (#11497) @ttnghia
• Fix distributed error related to loop_in_thread (#11428) @galipremsagar
• Fix atomic operations on NaN values (#11420) @ttnghia
• Relax arrow pinning to just 8.x and remove cuda build dependency from cudf recipe (#11412) @kkraus14
• Revert "Allow CuPy 11" (#11409) @jakirkham
• Fix moto timeouts (#11369) @galipremsagar
• Set +/-infinity as the identity values for floating-point numbers in device operators min and max (#11357) @ttnghia
• Fix memory_usage() for ListSeries (#11355) @thomcom
• Fix constructing Column from column_view with expired mask (#11354) @shwina
• Handle parquet corner case: Columns with more rows than are in the row group. (#11353) @nvdbaranec
• Fix DatetimeIndex & TimedeltaIndex constructors (#11342) @galipremsagar
• Fix unsigned-compare compile warning in IntPow binops (#11339) @davidwendt
• Fix performance issue and add a new code path to cudf::detail::contains (#11330) @ttnghia
• Pin pytorch to temporarily unblock from libcupti errors (#11289) @galipremsagar
• Workaround for nvcomp zstd overwriting blocks for orc due to underestimate of sizes (#11288) @jbrennan333
• Fix inconsistency when hashing two tables in cudf::detail::contains (#11284) @ttnghia
• Fix issue related to numpy array and category dtype (#11282) @galipremsagar
• Add NotImplementedError when on is specified in DataFrame.join. (#11275) @vyasr
• Fix invalid allocate_like() and empty_like() tests. (#11268) @nvdbaranec
• Returns DataFrame When Concating Along Axis 1 (#11263) @isVoid
• Fix compile error due to missing header (#11257) @ttnghia
• Fix a memory aliasing/crash issue in scatter for lists. (#11254) @nvdbaranec
• Fix tests/rolling/empty_input_test (#11238) @ttnghia
• Fix const qualifier when using host_span<bitmask_type const*> (#11220) @ttnghia
• Avoid using nvcompBatchedDeflateDecompressGetTempSizeEx in cuIO (#11213) @vuule
• Generate benchmark data with correct run length regardless of cardinality (#11205) @vuule
• Fix cumulative count index behavior (#11188) @brandon-b-miller
• Fix assertion in dask_cudf test_struct_explode (#11170) @rjzamora
• Provides a method for the user to remove the hook and re-register the hook in a custom shutdown hook manager (#11161) @res-life
• Fix compatibility issues with pandas 1.4.3 (#11152) @vyasr
• Ensure cuco export set is installed in cmake build (#11147) @jlowe
• Avoid redundant deepcopy in cudf.from_pandas (#11142) @galipremsagar
• Fix compile error due to missing header (#11126) @ttnghia
• Fix __cuda_array_interface__ failures (#11113) @galipremsagar
• Support octal and hex within regex character class pattern (#11112) @davidwendt
• Fix split_re matching logic for word boundaries (#11106) @davidwendt
• Handle multiple files metadata in read_parquet (#11105) @galipremsagar
• Fix index alignment for Series objects with repeated index (#11103) @shwina
• FindcuFile now searches in the current CUDA Toolkit location (#11101) @robertmaynard
• Fix regex word boundary logic to include underline (#11099) @davidwendt
• Exclude CudaFatalTest when selecting all Java tests (#11083) @jlowe
• Fix duplicate cudatoolkit pinning issue (#11070) @galipremsagar
• Maintain the input index in the result of a groupby-transform (#11068) @shwina
• Fix bug with row count comparison for expect_columns_equivalent(). (#11059) @nvdbaranec
• Fix BPE uninitialized size value for null and empty input strings (#11054) @davidwendt
• Include missing header for usage of get_current_device_resource() (#11047) @AtlantaPepsi
• Fix warn_unused_result error in parquet test (#11026) @karthikeyann
• Return empty dataframe when reading a Parquet file using empty columns option (#11018) @vuule
• Fix small error in page row count limiting (#10991) @etseidl
• Fix a row index entry error in ORC writer issue (#10989) @vuule
• Fix grouped covariance to require both values to be convertible to double. (#10891) @bdice

📖 Documentation

• Defer loading of custom.js (#11465) @galipremsagar
• Fix issues with day & night modes in python docs (#11400) @galipremsagar
• Update missing data handling APIs in docs (#11345) @galipremsagar
• Add lists filtering APIs to doxygen group. (#11336) @bdice
• Remove unused import in README sample (#11318) @vyasr
• Note null behavior in where docs (#11276) @brandon-b-miller
• Update docstring for spans in get_row_data_range (#11271) @vyasr
• Update nvCOMP integration table (#11231) @vuule
• Add dev docs for documentation writing (#11217) @vyasr
• Documentation fix for concatenate (#11187) @dagardner-nv
• Fix unresolved links in markdown (#11173) @karthikeyann
• Fix cudf version in README.md install commands (#11164) @jvanstraten
• Switch language from None to "en" in docs build (#11133) @galipremsagar
• Remove docs mentioning scalar_view since no such class exists. (#11132) @bdice
• Add docstring entry for DataFrame.value_counts (#11039) @galipremsagar
• Add docs to rolling var, std, count. (#11035) @bdice
• Fix docs for Numba UDFs. (#11020) @bdice
• Replace column comparison utilities functions with macros (#11007) @karthikeyann
• Fix Doxygen warnings in multiple headers files (#11003) @karthikeyann
• Fix doxygen warnings in utilities/ headers (#10974) @karthikeyann
• Fix Doxygen warnings in table header files (#10964) @karthikeyann
• Fix Doxygen warnings in column header files (#10963) @karthikeyann
• Fix Doxygen warnings in strings / header files (#10937) @karthikeyann
• Generate Doxygen Tag File for Libcudf (#10932) @isVoid
• Fix doxygen warnings in structs, lists headers (#10923) @karthikeyann
• Fix doxygen warnings in fixed_point.hpp (#10922) @karthikeyann
• Fix doxygen warnings in ast/, rolling, tdigest/, wrappers/, dictionary/ headers (#10921) @karthikeyann
• fix doxygen warnings in cudf/io/types.hpp, other header files (#10913) @karthikeyann
• fix doxygen warnings in cudf/io/ avro, csv, json, orc, parquet header files (#10912) @karthikeyann
• Fix doxygen warnings in cudf/*.hpp (#10896) @karthikeyann
• Add missing documentation in aggregation.hpp (#10887) @karthikeyann
• Revise PR template. (#10774) @bdice

🚀 New Features

• Change cmake to allow controlling Arrow version via cmake variable (#11429) @kkraus14
• Adding support for list<int8> columns to be written as byte arrays in parquet (#11328) @hyperbolic2346
• Adding byte array view structure (#11322) @hyperbolic2346
• Adding byte_array statistics (#11303) @hyperbolic2346
• Add column indexes to Parquet writer (#11302) @etseidl
• Provide an Option for Default Integer and Floating Bitwidth (#11272) @isVoid
• FST benchmark (#11243) @karthikeyann
• Adds the Finite-State Transducer algorithm (#11242) @elstehle
• Refactor collect_set to use cudf::distinct and cudf::lists::distinct (#11228) @ttnghia
• Treat zstd as stable in nvcomp releases 2.3.2 and later (#11226) @jbrennan333
• Add 24 bit dictionary support to Parquet writer (#11216) @devavret
• Enable positive group indices for extractAllRecord on JNI (#11215) @anthony-chang
• JNI bindings for NTH_ELEMENT window aggregation (#11201) @mythrocks
• Add JNI bindings for extractAllRecord (#11196) @anthony-chang
• Add cudf.options (#11193) @isVoid
• Add thrift support for parquet column and offset indexes (#11178) @etseidl
• Adding binary read/write as options for parquet (#11160) @hyperbolic2346
• Support nth_element for window functions (#11158) @mythrocks
• Implement lists::distinct and cudf::detail::stable_distinct (#11149) @ttnghia
• Implement Groupby pct_change (#11144) @skirui-source
• Add JNI for set operations (#11143) @ttnghia
• Remove deprecated PER_THREAD_DEFAULT_STREAM (#11134) @jbrennan333
• Added a Java method to check the existence of a list of keys in a map (#11128) @razajafri
• Feature/python benchmarking (#11125) @vyasr
• Support nan_equality in cudf::distinct (#11118) @ttnghia
• Added JNI for getMapValueForKeys (#11104) @razajafri
• Refactor semi_anti_join (#11100) @ttnghia
• Replace remaining instances of rmm::cuda_stream_default with cudf::default_stream_value (#11082) @jbrennan333
• Adds the Logical Stack algorithm (#11078) @elstehle
• Add doxygen-check pre-commit hook (#11076) @karthikeyann
• Use new nvCOMP API to optimize the decompression temp memory size (#11064) @vuule
• Add Doxygen CI check (#11057) @karthikeyann
• Support duplicate_keep_option in cudf::distinct (#11052) @ttnghia
• Support set operations (#11043) @ttnghia
• Support for ZLIB compression in ORC writer (#11036) @vuule
• Adding feature swaplevels (#11027) @VamsiTallam95
• Use nvCOMP for ZLIB decompression in ORC reader (#11024) @vuule
• Function for bfill, ffill #9591 (#11022) @Sreekiran096
• Generate group offsets from element labels (#11017) @ttnghia
• Feature axes (#10979) @VamsiTallam95
• Generate group labels from offsets (#10945) @ttnghia
• Add missing cuIO benchmark coverage for duration types (#10933) @vuule
• Dask-cuDF cumulative groupby ops (#10889) @brandon-b-miller
• Reindex Improvements (#10815) @brandon-b-miller
• Implement value_counts for DataFrame (#10813) @martinfalisse

🛠️ Improvements

• Pin numpy to <1.23 (#11824) @galipremsagar
• Make Index Join Tests on Default Precisions Deterministic (#11451) @isVoid
• Pin dask & distributed for release (#11433) @galipremsagar...

v22.08.00

🚨 Breaking Changes

• Remove legacy join APIs (#11274) @vyasr
• Remove lists::drop_list_duplicates (#11236) @ttnghia
• Remove Index.replace API (#11131) @vyasr
• Remove deprecated Index methods from Frame (#11073) @vyasr
• Remove public API of cudf.merge_sorted. (#11032) @bdice
• Drop python 3.7 in code-base (#11029) @galipremsagar
• Return empty dataframe when reading a Parquet file using empty columns option (#11018) @vuule
• Remove Arrow CUDA IPC code (#10995) @shwina
• Buffer: make .ptr read-only (#10872) @madsbk

🐛 Bug Fixes

• Fix distributed error related to loop_in_thread (#11428) @galipremsagar
• Relax arrow pinning to just 8.x and remove cuda build dependency from cudf recipe (#11412) @kkraus14
• Revert "Allow CuPy 11" (#11409) @jakirkham
• Fix moto timeouts (#11369) @galipremsagar
• Set +/-infinity as the identity values for floating-point numbers in device operators min and max (#11357) @ttnghia
• Fix memory_usage() for ListSeries (#11355) @thomcom
• Fix constructing Column from column_view with expired mask (#11354) @shwina
• Handle parquet corner case: Columns with more rows than are in the row group. (#11353) @nvdbaranec
• Fix DatetimeIndex & TimedeltaIndex constructors (#11342) @galipremsagar
• Fix unsigned-compare compile warning in IntPow binops (#11339) @davidwendt
• Fix performance issue and add a new code path to cudf::detail::contains (#11330) @ttnghia
• Pin pytorch to temporarily unblock from libcupti errors (#11289) @galipremsagar
• Workaround for nvcomp zstd overwriting blocks for orc due to underestimate of sizes (#11288) @jbrennan333
• Fix inconsistency when hashing two tables in cudf::detail::contains (#11284) @ttnghia
• Fix issue related to numpy array and category dtype (#11282) @galipremsagar
• Add NotImplementedError when on is specified in DataFrame.join. (#11275) @vyasr
• Fix invalid allocate_like() and empty_like() tests. (#11268) @nvdbaranec
• Returns DataFrame When Concating Along Axis 1 (#11263) @isVoid
• Fix compile error due to missing header (#11257) @ttnghia
• Fix a memory aliasing/crash issue in scatter for lists. (#11254) @nvdbaranec
• Fix tests/rolling/empty_input_test (#11238) @ttnghia
• Fix const qualifier when using host_span<bitmask_type const*> (#11220) @ttnghia
• Avoid using nvcompBatchedDeflateDecompressGetTempSizeEx in cuIO (#11213) @vuule
• Generate benchmark data with correct run length regardless of cardinality (#11205) @vuule
• Fix cumulative count index behavior (#11188) @brandon-b-miller
• Fix assertion in dask_cudf test_struct_explode (#11170) @rjzamora
• Provides a method for the user to remove the hook and re-register the hook in a custom shutdown hook manager (#11161) @res-life
• Fix compatibility issues with pandas 1.4.3 (#11152) @vyasr
• Ensure cuco export set is installed in cmake build (#11147) @jlowe
• Avoid redundant deepcopy in cudf.from_pandas (#11142) @galipremsagar
• Fix compile error due to missing header (#11126) @ttnghia
• Fix __cuda_array_interface__ failures (#11113) @galipremsagar
• Support octal and hex within regex character class pattern (#11112) @davidwendt
• Fix split_re matching logic for word boundaries (#11106) @davidwendt
• Handle multiple files metadata in read_parquet (#11105) @galipremsagar
• Fix index alignment for Series objects with repeated index (#11103) @shwina
• FindcuFile now searches in the current CUDA Toolkit location (#11101) @robertmaynard
• Fix regex word boundary logic to include underline (#11099) @davidwendt
• Exclude CudaFatalTest when selecting all Java tests (#11083) @jlowe
• Fix duplicate cudatoolkit pinning issue (#11070) @galipremsagar
• Maintain the input index in the result of a groupby-transform (#11068) @shwina
• Fix bug with row count comparison for expect_columns_equivalent(). (#11059) @nvdbaranec
• Fix BPE uninitialized size value for null and empty input strings (#11054) @davidwendt
• Include missing header for usage of get_current_device_resource() (#11047) @AtlantaPepsi
• Fix warn_unused_result error in parquet test (#11026) @karthikeyann
• Return empty dataframe when reading a Parquet file using empty columns option (#11018) @vuule
• Fix small error in page row count limiting (#10991) @etseidl
• Fix a row index entry error in ORC writer issue (#10989) @vuule
• Fix grouped covariance to require both values to be convertible to double. (#10891) @bdice

📖 Documentation

• Fix issues with day & night modes in python docs (#11400) @galipremsagar
• Update missing data handling APIs in docs (#11345) @galipremsagar
• Add lists filtering APIs to doxygen group. (#11336) @bdice
• Remove unused import in README sample (#11318) @vyasr
• Note null behavior in where docs (#11276) @brandon-b-miller
• Update docstring for spans in get_row_data_range (#11271) @vyasr
• Update nvCOMP integration table (#11231) @vuule
• Add dev docs for documentation writing (#11217) @vyasr
• Documentation fix for concatenate (#11187) @dagardner-nv
• Fix unresolved links in markdown (#11173) @karthikeyann
• Fix cudf version in README.md install commands (#11164) @jvanstraten
• Switch language from None to "en" in docs build (#11133) @galipremsagar
• Remove docs mentioning scalar_view since no such class exists. (#11132) @bdice
• Add docstring entry for DataFrame.value_counts (#11039) @galipremsagar
• Add docs to rolling var, std, count. (#11035) @bdice
• Fix docs for Numba UDFs. (#11020) @bdice
• Replace column comparison utilities functions with macros (#11007) @karthikeyann
• Fix Doxygen warnings in multiple headers files (#11003) @karthikeyann
• Fix doxygen warnings in utilities/ headers (#10974) @karthikeyann
• Fix Doxygen warnings in table header files (#10964) @karthikeyann
• Fix Doxygen warnings in column header files (#10963) @karthikeyann
• Fix Doxygen warnings in strings / header files (#10937) @karthikeyann
• Generate Doxygen Tag File for Libcudf (#10932) @isVoid
• Fix doxygen warnings in structs, lists headers (#10923) @karthikeyann
• Fix doxygen warnings in fixed_point.hpp (#10922) @karthikeyann
• Fix doxygen warnings in ast/, rolling, tdigest/, wrappers/, dictionary/ headers (#10921) @karthikeyann
• fix doxygen warnings in cudf/io/types.hpp, other header files (#10913) @karthikeyann
• fix doxygen warnings in cudf/io/ avro, csv, json, orc, parquet header files (#10912) @karthikeyann
• Fix doxygen warnings in cudf/*.hpp (#10896) @karthikeyann
• Add missing documentation in aggregation.hpp (#10887) @karthikeyann
• Revise PR template. (#10774) @bdice

🚀 New Features

• Change cmake to allow controlling Arrow version via cmake variable (#11429) @kkraus14
• Adding support for list<int8> columns to be written as byte arrays in parquet (#11328) @hyperbolic2346
• Adding byte array view structure (#11322) @hyperbolic2346
• Adding byte_array statistics (#11303) @hyperbolic2346
• Add column indexes to Parquet writer (#11302) @etseidl
• Provide an Option for Default Integer and Floating Bitwidth (#11272) @isVoid
• FST benchmark (#11243) @karthikeyann
• Adds the Finite-State Transducer algorithm (#11242) @elstehle
• Refactor collect_set to use cudf::distinct and cudf::lists::distinct (#11228) @ttnghia
• Treat zstd as stable in nvcomp releases 2.3.2 and later (#11226) @jbrennan333
• Add 24 bit dictionary support to Parquet writer (#11216) @devavret
• Enable positive group indices for extractAllRecord on JNI (#11215) @anthony-chang
• JNI bindings for NTH_ELEMENT window aggregation (#11201) @mythrocks
• Add JNI bindings for extractAllRecord (#11196) @anthony-chang
• Add cudf.options (#11193) @isVoid
• Add thrift support for parquet column and offset indexes (#11178) @etseidl
• Adding binary read/write as options for parquet (#11160) @hyperbolic2346
• Support nth_element for window functions (#11158) @mythrocks
• Implement lists::distinct and cudf::detail::stable_distinct (#11149) @ttnghia
• Implement Groupby pct_change (#11144) @skirui-source
• Add JNI for set operations (#11143) @ttnghia
• Remove deprecated PER_THREAD_DEFAULT_STREAM (#11134) @jbrennan333
• Added a Java method to check the existence of a list of keys in a map (#11128) @razajafri
• Feature/python benchmarking (#11125) @vyasr
• Support nan_equality in cudf::distinct (#11118) @ttnghia
• Added JNI for getMapValueForKeys (#11104) @razajafri
• Refactor semi_anti_join (#11100) @ttnghia
• Replace remaining instances of rmm::cuda_stream_default with cudf::default_stream_value (#11082) @jbrennan333
• Adds the Logical Stack algorithm (#11078) @elstehle
• Add doxygen-check pre-commit hook (#11076) @karthikeyann
• Use new nvCOMP API to optimize the decompression temp memory size (#11064) @vuule
• Add Doxygen CI check (#11057) @karthikeyann
• Support duplicate_keep_option in cudf::distinct (#11052) @ttnghia
• Support set operations (#11043) @ttnghia
• Support for ZLIB compression in ORC writer (#11036) @vuule
• Adding feature swaplevels (#11027) @VamsiTallam95
• Use nvCOMP for ZLIB decompression in ORC reader (#11024) @vuule
• Function for bfill, ffill #9591 (#11022) @Sreekiran096
• Generate group offsets from element labels (#11017) @ttnghia
• Feature axes (#10979) @VamsiTallam95
• Generate group labels from offsets (#10945) @ttnghia
• Add missing cuIO benchmark coverage for duration types (#10933) @vuule
• Dask-cuDF cumulative groupby ops (#10889) @brandon-b-miller
• Reindex Improvements (#10815) @brandon-b-miller
• Implement value_counts for DataFrame (#10813) @martinfalisse

🛠️ Improvements

• Pin dask & distributed for release (#11433) @galipremsagar
• Use documented header template for doxygen (#11430) @galipremsagar
• Relax arrow version in dev env (#11418) @galipremsagar
• Allow CuPy 11 (#11393) @jakirkham
• Improve multibyte_split performance (#11347) @cwharris
• Switch death test to use explicit trap. (#11326) @vyasr
• Add --output-on-failure to ctest args. (#11321) @vyasr
• Consolidate remaining DataFrame...

[NIGHTLY] v22.10.00

🔗 Links

• Development Branch
• Compare with main branch

🚨 Breaking Changes

• Disable Zstandard decompression on nvCOMP 2.4 and Pascal GPus (#11856) @vuule
• Disable nvCOMP DEFLATE integration (#11811) @vuule
• Fix return type of Index.isna & Index.notna (#11769) @galipremsagar
• Remove kwargs in read_csv & to_csv (#11762) @galipremsagar
• Fix cudf::partition* APIs that do not return offsets for empty output table (#11709) @ttnghia
• Fix regex negated classes to not automatically include new-lines (#11644) @davidwendt
• Update zfill to match Python output (#11634) @davidwendt
• Upgrade pandas to 1.5 (#11617) @galipremsagar
• Change default value of ordered to False in CategoricalDtype (#11604) @galipremsagar
• Move cudf::strings::findall_record to cudf::strings::findall (#11575) @davidwendt
• Adding optional parquet reader schema (#11524) @hyperbolic2346
• Deprecate skiprows and num_rows in read_orc (#11522) @galipremsagar
• Remove support for skip_rows / num_rows options in the parquet reader. (#11503) @nvdbaranec
• Drop support for skiprows and num_rows in cudf.read_parquet (#11480) @galipremsagar
• Disable Arrow S3 support by default. (#11470) @bdice
• Convert thrust::optional usages to std::optional (#11455) @robertmaynard
• Remove unused is_struct trait. (#11450) @bdice
• Refactor the Buffer class (#11447) @madsbk
• Return empty dataframe when reading an ORC file using empty columns option (#11446) @vuule
• Refactor pad_side and strip_type enums into side_type enum (#11438) @davidwendt
• Remove HASH_SERIAL_MURMUR3 / serial32BitMurmurHash3 (#11383) @bdice
• Use the new JSON parser when the experimental reader is selected (#11364) @vuule
• Remove deprecated Series.applymap. (#11031) @bdice
• Remove deprecated expand parameter from str.findall. (#11030) @bdice

🐛 Bug Fixes

• Force using old fmt in nvbench. (#12064) @vyasr
• Update cuda-python dependency to 11.7.1 (#11994) @shwina
• Fixes bug in temporary decompression space estimation before calling nvcomp (#11879) @abellina
• Handle ptx file paths during strings_udf import (#11862) @galipremsagar
• Disable Zstandard decompression on nvCOMP 2.4 and Pascal GPus (#11856) @vuule
• Reset strings_udf CEC and solve several related issues (#11846) @brandon-b-miller
• Fix bug in new shuffle-based groupby implementation (#11836) @rjzamora
• Fix is_valid checks in Scalar._binaryop (#11818) @wence-
• Fix operator NotImplemented issue with numpy (#11816) @galipremsagar
• Disable nvCOMP DEFLATE integration (#11811) @vuule
• Build strings_udf package with other python packages in nightlies (#11808) @brandon-b-miller
• Revert problematic shuffle=explicit-comms changes (#11803) @rjzamora
• Fix regex out-of-bounds write in strided rows logic (#11797) @davidwendt
• Build cudf locally before building strings_udf conda packages in CI (#11785) @brandon-b-miller
• Fix an issue in cudf::row_bit_count involving structs and lists at multiple levels. (#11779) @nvdbaranec
• Fix return type of Index.isna & Index.notna (#11769) @galipremsagar
• Fix issue with set-item incase of list and struct types (#11760) @galipremsagar
• Ensure all libcudf APIs run on cudf's default stream (#11759) @vyasr
• Resolve dask_cudf failures caused by upstream groupby changes (#11755) @rjzamora
• Fix ORC string sum statistics (#11740) @vuule
• Add strings_udf package for python 3.9 (#11730) @brandon-b-miller
• Ensure that all tests launch kernels on cudf's default stream (#11726) @vyasr
• Don't assume stream is a compile-time constant expression (#11725) @vyasr
• Fix get_thrust.cmake format at patch command (#11715) @davidwendt
• Fix cudf::partition* APIs that do not return offsets for empty output table (#11709) @ttnghia
• Fix cudf::lists::sort_lists for NaN and Infinity values (#11703) @davidwendt
• Modify ORC reader timestamp parsing to match the apache reader behavior (#11699) @vuule
• Fix DataFrame.from_arrow to preserve type metadata (#11698) @galipremsagar
• Fix compile error due to missing header (#11697) @ttnghia
• Default to Snappy compression in to_orc when using cuDF or Dask (#11690) @vuule
• Fix an issue related to Multindex when group_keys=True (#11689) @galipremsagar
• Transfer correct dtype to exploded column (#11687) @wence-
• Ignore protobuf generated files in mypy checks (#11685) @galipremsagar
• Maintain the index name after .loc (#11677) @shwina
• Fix issue with extracting nested column data & dtype preservation (#11671) @galipremsagar
• Ensure that all cudf tests and benchmarks are conda env aware (#11666) @robertmaynard
• Update to Thrust 1.17.2 to fix cub ODR issues (#11665) @robertmaynard
• Fix multi-file remote datasource bug (#11655) @rjzamora
• Fix invalid regex quantifier check to not include alternation (#11654) @davidwendt
• Fix bug in device_write(): it uses an incorrect size (#11651) @madsbk
• fixes overflows in benchmarks (#11649) @elstehle
• Fix regex negated classes to not automatically include new-lines (#11644) @davidwendt
• Fix compile error in benchmark nested_json.cpp (#11637) @davidwendt
• Update zfill to match Python output (#11634) @davidwendt
• Removed converted type for INT32 and INT64 since they do not convert (#11627) @hyperbolic2346
• Fix host scalars construction of nested types (#11612) @galipremsagar
• Fix compile warning in nested_json_gpu.cu (#11607) @davidwendt
• Change default value of ordered to False in CategoricalDtype (#11604) @galipremsagar
• Preserve order if necessary when deduping categoricals internally (#11597) @brandon-b-miller
• Add is_timestamp test for leap second (60) (#11594) @davidwendt
• Fix an issue with to_arrow when column name type is not a string (#11590) @galipremsagar
• Fix exception in segmented-reduce benchmark (#11588) @davidwendt
• Fix encode/decode of negative timestamps in ORC reader/writer (#11586) @vuule
• Correct distribution data type in quantiles benchmark (#11584) @vuule
• Fix multibyte_split benchmark for host buffers (#11583) @upsj
• xfail custreamz display test for now (#11567) @shwina
• Fix JNI for TableWithMeta to use schema_info instead of column_names (#11566) @jlowe
• Reduce code duplication for dask & distributed nightly/stable installs (#11565) @galipremsagar
• Fix groupby failures in dask_cudf CI (#11561) @rjzamora
• Fix for pivot: error when 'values' is a multicharacter string (#11538) @shaswat-indian
• find_package(cudf) + arrow9 usable with cudf build directory (#11535) @robertmaynard
• Fixing crash when writing binary nested data in parquet (#11526) @hyperbolic2346
• Fix for: error when assigning a value to an empty series (#11523) @shaswat-indian
• Fix invalid results from conditional-left-anti-join in debug build (#11517) @davidwendt
• Fix cmake error after upgrading to Arrow 9 (#11513) @ttnghia
• Fix reverse binary operators acting on a host value and cudf.Scalar (#11512) @bdice
• Update parquet fuzz tests to drop support for skiprows & num_rows (#11505) @galipremsagar
• Use rapids-cmake 22.10 best practice for RAPIDS.cmake location (#11493) @robertmaynard
• Handle some zero-sized corner cases in dlpack interop (#11449) @wence-
• Return empty dataframe when reading an ORC file using empty columns option (#11446) @vuule
• libcudf c++ example updated to CPM version 0.35.3 (#11417) @robertmaynard
• Fix regex quantifier check to include capture groups (#11373) @davidwendt
• Fix read_text when byte_range is aligned with field (#11371) @upsj
• Fix to_timestamps truncated subsecond calculation (#11367) @davidwendt
• column: calculate null_count before release()ing the cudf::column (#11365) @wence-

📖 Documentation

• Update guide-to-udfs notebook (#11861) @brandon-b-miller
• Update docstring for cudf.read_text (#11799) @GregoryKimball
• Add doc section for list & struct handling (#11770) @galipremsagar
• Document that minimum required CMake version is now 3.23.1 (#11751) @robertmaynard
• Update libcudf documentation build command in DOCUMENTATION.md (#11735) @davidwendt
• Add docs for use of string data to DataFrame.apply and Series.apply and update guide to UDFs notebook (#11733) @brandon-b-miller
• Enable more Pydocstyle rules (#11582) @bdice
• Remove unused cpp/img folder (#11554) @davidwendt
• Publish C++ developer docs (#11475) @vyasr
• Fix a misalignment in cudf.get_dummies docstring (#11443) @galipremsagar
• Update contributing doc to include links to the developer guides (#11390) @davidwendt
• Fix table_view_base doxygen format (#11340) @davidwendt
• Create main developer guide for Python (#11235) @vyasr
• Add developer documentation for benchmarking (#11122) @vyasr
• cuDF error handling document (#7917) @isVoid

🚀 New Features

• Add hasNull statistic reading ability to ORC (#11747) @devavret
• Add istitle to string UDFs (#11738) @brandon-b-miller
• JSON Column creation in GPU (#11714) @karthikeyann
• Adds option to take explicit nested schema for nested JSON reader (#11682) @elstehle
• Add BGZIP data_chunk_reader (#11652) @upsj
• Support DECIMAL order-by for RANGE window functions (#11645) @mythrocks
• changing version of cmake to 3.23.3 (#11619) @hyperbolic2346
• Generate unique keys table in java JNI contiguousSplitGroups (#11614) @res-life
• Generic type casting to support the new nested JSON reader (#11613) @elstehle
• JSON tree traversal (#11610) @karthikeyann
• Add casting operators to masked UDFs (#11578) @brandon-b-miller
• Adds type inference and type conversion for leaf-columns to the nested JSON parser (#11574) @elstehle
• Add strings 'like' function (#11558) @davidwendt
• Handle hyphen as literal for regex cclass when incomplete range (#11557) @davidwendt
• Enable ZSTD compression in ORC and Parquet writers (#11551) @vuule
• Adds support for json lines format to the ne...

v22.06.01

v22.06.01

v22.06.00

🚨 Breaking Changes

• Enable Zstandard decompression only when all nvcomp integrations are enabled (#10944) @vuule
• Rename sliced_child to get_sliced_child. (#10885) @bdice
• Add parameters to control page size in Parquet writer (#10882) @etseidl
• Make cudf::test::expect_columns_equal() to fail when comparing unsanitary lists. (#10880) @nvdbaranec
• Cleanup regex compiler fixed quantifiers source (#10843) @davidwendt
• Refactor cudf::contains, renaming and switching parameters role (#10802) @ttnghia
• Generic serialization of all column types (#10784) @wence-
• Return per-file metadata from readers (#10782) @vuule
• HostColumnVectoreCore#isNull should return true for out-of-range rows (#10779) @gerashegalov
• Update groupby::hash to use new row operators for keys (#10770) @PointKernel
• update mangle_dupe_cols behavior in csv reader to match pandas 1.4.0 behavior (#10749) @karthikeyann
• Rename CUDA_TRY macro to CUDF_CUDA_TRY, rename CHECK_CUDA macro to CUDF_CHECK_CUDA. (#10589) @bdice
• Upgrade cudf to support pandas 1.4.x versions (#10584) @galipremsagar
• Move binop methods from Frame to IndexedFrame and standardize the docstring (#10576) @vyasr
• Add default= kwarg to .list.get() accessor method (#10547) @shwina
• Remove deprecated decimal_cols_as_float in the ORC reader (#10515) @vuule
• Support nvComp 2.3 if local, otherwise use nvcomp 2.2 (#10513) @robertmaynard
• Fix findall_record to return empty list for no matches (#10491) @davidwendt
• Namespace/Docstring Fixes for Reduction (#10471) @isVoid
• Additional refactoring of hash functions (#10462) @bdice
• Fix default value of str.split expand parameter. (#10457) @bdice
• Remove deprecated code. (#10450) @vyasr

🐛 Bug Fixes

• Fix single column MultiIndex issue in sort_index (#10957) @galipremsagar
• Make SerializedTableHeader(numRows) public (#10949) @gerashegalov
• Fix gcc_linux version pinning in dev environment (#10943) @galipremsagar
• Fix an issue with reading raw string in cudf.read_json (#10924) @galipremsagar
• Make cudf::test::expect_columns_equal() to fail when comparing unsanitary lists. (#10880) @nvdbaranec
• Fix segmented_reduce on empty column with non-empty offsets (#10876) @davidwendt
• Fix dask-cudf groupby handling when grouping by all columns (#10866) @charlesbluca
• Fix a bug in distinct: using nested nulls logic (#10848) @PointKernel
• Fix constness / references in weak ordering operator() signatures. (#10846) @bdice
• Suppress sizeof-array-div warnings in thrust found by gcc-11 (#10840) @robertmaynard
• Add handling for string by-columns in dask-cudf groupby (#10830) @charlesbluca
• Fix compile warning in search.cu (#10827) @davidwendt
• Fix element access const correctness in hostdevice_vector (#10804) @vuule
• Update cuco git tag (#10788) @PointKernel
• HostColumnVectoreCore#isNull should return true for out-of-range rows (#10779) @gerashegalov
• Fixing deprecation warnings in test_orc.py (#10772) @hyperbolic2346
• Enable writing to s3 storage in chunked parquet writer (#10769) @galipremsagar
• Fix construction of nested structs with EMPTY child (#10761) @shwina
• Fix replace error when regex has only zero match quantifiers (#10760) @davidwendt
• Fix an issue with one_level_list schemas in parquet reader. (#10750) @nvdbaranec
• update mangle_dupe_cols behavior in csv reader to match pandas 1.4.0 behavior (#10749) @karthikeyann
• Fix cupy function in notebook (#10737) @ajschmidt8
• Fix fillna to retain columns when it is MultiIndex (#10729) @galipremsagar
• Fix scatter for all-empty-string column case (#10724) @davidwendt
• Retain series name in Series.apply (#10716) @brandon-b-miller
• Correct build dir cudf-config dependency issues for static builds (#10704) @robertmaynard
• Fix list of testing requirements in setup.py. (#10678) @bdice
• Fix rounding to zero error in stod on very small float numbers (#10672) @davidwendt
• cuco isn't a cudf dependency when we are built shared (#10662) @robertmaynard
• Fix to_timestamps to support Z for %z format specifier (#10617) @davidwendt
• Verify compression type in Parquet reader (#10610) @vuule
• Fix struct row comparator's exception on empty structs (#10604) @sperlingxx
• Fix strings strip() to accept only str Scalar for to_strip parameter (#10597) @davidwendt
• Fix has_atomic_support check in can_use_hash_groupby() (#10588) @jbrennan333
• Revert Thrust 1.16 to Thrust 1.15 (#10586) @bdice
• Fix missing RMM_STATIC_CUDART define when compiling JNI with static CUDA runtime (#10585) @jlowe
• pin more cmake versions (#10570) @robertmaynard
• Re-enable Build Metrics Report (#10562) @davidwendt
• Remove statically linked CUDA runtime check in Java build (#10532) @jlowe
• Fix temp data cleanup in test_text.py (#10524) @brandon-b-miller
• Update pre-commit to run black 22.3.0 (#10523) @vyasr
• Remove deprecated decimal_cols_as_float in the ORC reader (#10515) @vuule
• Fix findall_record to return empty list for no matches (#10491) @davidwendt
• Allow users to specify data types for a subset of columns in read_csv (#10484) @vuule
• Fix default value of str.split expand parameter. (#10457) @bdice
• Improve coverage of dask-cudf's groupby aggregation, add tests for dropna support (#10449) @charlesbluca
• Allow string aggs for dask_cudf.CudfDataFrameGroupBy.aggregate (#10222) @charlesbluca
• In-place updates with loc or iloc don't work correctly when the LHS has more than one column (#9918) @skirui-source

📖 Documentation

• Clarify append deprecation notice. (#10930) @bdice
• Use full name of GPUDirect Storage SDK in docs (#10904) @vuule
• Update Dask + Pandas to Dask + cuDF path (#10897) @miguelusque
• Add missing documentation in cudf/types.hpp (#10895) @karthikeyann
• Add strong index iterator docs. (#10888) @bdice
• spell check fixes (#10865) @karthikeyann
• Add missing documentation in scalar/ headers (#10861) @karthikeyann
• Remove typo in ngram documentation (#10859) @miguelusque
• fix doxygen warnings (#10842) @karthikeyann
• Add a library_design.md file documenting the core Python data structures and their relationship (#10817) @vyasr
• Add NumPy to intersphinx references. (#10809) @bdice
• Add a section to the docs that compares cuDF with Pandas (#10796) @shwina
• Mention 2 cpp-reviewer requirement in pull request template (#10768) @davidwendt
• Enable pydocstyle for all packages. (#10759) @bdice
• Enable pydocstyle rules involving quotes (#10748) @vyasr
• Revise 10 minutes notebook. (#10738) @bdice
• Reorganize cuDF Python docs (#10691) @shwina
• Fix sphinx/jupyter heading issue in UDF notebook (#10690) @brandon-b-miller
• Migrated user guide notebooks to MyST-NB and added sphinx extension (#10685) @mmccarty
• add data generation to benchmark documentation (#10677) @karthikeyann
• Fix some docs build warnings (#10674) @galipremsagar
• Update UDF notebook in User Guide. (#10668) @bdice
• Improve User Guide docs (#10663) @bdice
• Fix some docstrings formatting (#10660) @galipremsagar
• Remove implementation details from apply docstrings (#10651) @brandon-b-miller
• Revise CONTRIBUTING.md (#10644) @bdice
• Add missing APIs to documentation. (#10643) @bdice
• Use cudf.read_json as documented API name. (#10640) @bdice
• Fix docstring section headings. (#10639) @bdice
• Document cudf.read_text and cudf.read_avro. (#10638) @bdice
• Fix type-o in docstring for json_reader_options (#10627) @dagardner-nv
• Update guide to UDFs with notes about Series.applymap deprecation and related changes (#10607) @brandon-b-miller
• Fix doxygen Modules page for cudf::lists::sequences (#10561) @davidwendt
• Add Replace Backreferences section to Regex Features page (#10560) @davidwendt
• Introduce deprecation policy to developer guide. (#10252) @vyasr

🚀 New Features

• Enable Zstandard decompression only when all nvcomp integrations are enabled (#10944) @vuule
• Handle nested types in cudf::concatenate_rows() (#10890) @nvdbaranec
• Strong index types for equality comparator (#10883) @ttnghia
• Add parameters to control page size in Parquet writer (#10882) @etseidl
• Support for Zstandard decompression in ORC reader (#10873) @vuule
• Use pre-built nvcomp 2.3 binaries by default (#10851) @robertmaynard
• Support for Zstandard decompression in Parquet reader (#10847) @vuule
• Add JNI support for apply_boolean_mask (#10812) @res-life
• Segmented Min/Max for Fixed Point Types (#10794) @isVoid
• Return per-file metadata from readers (#10782) @vuule
• Segmented apply_boolean_mask for LIST columns (#10773) @mythrocks
• Update groupby::hash to use new row operators for keys (#10770) @PointKernel
• Support purging non-empty null elements from LIST/STRING columns (#10701) @mythrocks
• Add detail::hash_join (#10695) @PointKernel
• Persist string statistics data across multiple calls to orc chunked write (#10694) @hyperbolic2346
• Add .list.astype() to cast list leaves to specified dtype (#10693) @shwina
• JNI: Add generateListOffsets API (#10683) @sperlingxx
• Support args in groupby apply (#10682) @brandon-b-miller
• Enable segmented_gather in Java package (#10669) @sperlingxx
• Add row hasher with nested column support (#10641) @devavret
• Add support for numeric_only in DataFrame._reduce (#10629) @martinfalisse
• First step toward statistics in ORC files with chunked writes (#10567) @hyperbolic2346
• Add support for struct columns to the random table generator (#10566) @vuule
• Enable passing a sequence for the index argument to .list.get() (#10564) @shwina
• Add python bindings for cudf::list::index_of (#10549) @ChrisJar
• Add default= kwarg to .list.get() accessor method (#10547) @shwina
• Add cudf.DataFrame.applymap (#10542) @brandon-b-miller
• Support nvComp 2.3 if local, otherwise use nvcomp 2.2 (#10513) @robertmaynard
• Add column field ID control in parquet writer (#10504) @PointKernel
• Deprecate Series.applymap (#10497) @brandon-b-miller
• Add option to drop cache in cuIO benchmarks (#10488) @vuule
• move...

v22.04.00

🚨 Breaking Changes

• Drop unsupported method argument from nunique and distinct_count. (#10411) @bdice
• Refactor stream compaction APIs (#10370) @PointKernel
• Add scan_aggregation and reduce_aggregation derived types. (#10357) @nvdbaranec
• Avoid decimal type narrowing for decimal binops (#10299) @galipremsagar
• Rewrites sample API (#10262) @isVoid
• Remove probe-time null equality parameters in cudf::hash_join (#10260) @PointKernel
• Enable proper Index round-tripping in orc reader and writer (#10170) @galipremsagar
• Add JNI for strings::split_re and strings::split_record_re (#10139) @ttnghia
• Change cudf::strings::find_multiple to return a lists column (#10134) @davidwendt
• Remove the option to completely disable decimal128 columns in the ORC reader (#10127) @vuule
• Remove deprecated code (#10124) @vyasr
• Update gpu_utils.py to reflect current CUDA support. (#10113) @bdice
• Optimize compaction operations (#10030) @PointKernel
• Remove deprecated method Series.set_index. (#9945) @bdice
• Add cudf::strings::findall_record API (#9911) @davidwendt
• Upgrade arrow & pyarrow to 6.0.1 (#9686) @galipremsagar

🐛 Bug Fixes

• Fix an issue with tdigest merge aggregations. (#10506) @nvdbaranec
• Batch of fixes for index overflows in grid stride loops. (#10448) @nvdbaranec
• Update dask_cudf imports to be compatible with latest dask (#10442) @rlratzel
• Fix for integer overflow in contiguous-split (#10437) @jbrennan333
• Fix has_null predicate for drop_list_duplicates on nested structs (#10436) @sperlingxx
• Fix empty reduce with List output and non-List input (#10435) @sperlingxx
• Fix list and struct meta generation issue in dask-cudf (#10434) @galipremsagar
• Fix error in cudf.to_numeric when a bool input is passed (#10431) @galipremsagar
• Support cupy array in quantile input (#10429) @galipremsagar
• Fix benchmarks to work with new aggregation types (#10428) @davidwendt
• Fix cudf::shift to handle offset greater than column size (#10414) @davidwendt
• Fix lifespan of the temporary directory that holds cuFile configuration file (#10403) @vuule
• Fix error thrown in compiled-binaryop benchmark (#10398) @davidwendt
• Limiting async allocator using alignment of 512 (#10395) @rongou
• Include <optional> in multibyte split. (#10385) @bdice
• Fix issue with column and scalar re-assignment (#10377) @galipremsagar
• Fix floating point data generation in benchmarks (#10372) @vuule
• Avoid overflow in fused_concatenate_kernel output_index (#10344) @abellina
• Remove is_relationally_comparable for table device views (#10342) @davidwendt
• Fix debug compile error in device_span to column_view conversion (#10331) @davidwendt
• Add Pascal support to JCUDF transcode (row_conversion) (#10329) @mythrocks
• Fix std::bad_alloc exception due to JIT reserving a huge buffer (#10317) @ttnghia
• Fixes up the overflowed fixed-point round on nullable column (#10316) @sperlingxx
• Fix DataFrame slicing issues for empty cases (#10310) @brandon-b-miller
• Fix documentation issues (#10307) @ajschmidt8
• Allow Java bindings to use default decimal precisions when writing columns (#10276) @sperlingxx
• Fix incorrect slicing of GDS read/write calls (#10274) @vuule
• Fix out-of-memory error in compiled-binaryop benchmark (#10269) @davidwendt
• Add tests of reflected ufuncs and fix behavior of logical reflected ufuncs (#10261) @vyasr
• Remove probe-time null equality parameters in cudf::hash_join (#10260) @PointKernel
• Fix out-of-memory error in UrlDecode benchmark (#10258) @davidwendt
• Fix groupby reductions that perform operations on source type instead of target type (#10250) @ttnghia
• Fix small leak in explode (#10245) @revans2
• Yet another small JNI memory leak (#10238) @revans2
• Fix regex octal parsing to limit to 3 characters (#10233) @davidwendt
• Fix string to decimal128 conversion handling large exponents (#10231) @davidwendt
• Fix JNI leak on copy to device (#10229) @revans2
• Fix the data generator element size for decimal types (#10225) @vuule
• Fix decimal metadata in parquet writer (#10224) @galipremsagar
• Fix strings handling of hex in regex pattern (#10220) @davidwendt
• Fix docs builds (#10216) @ajschmidt8
• Fix a leftover _has_nulls change from Nullate (#10211) @devavret
• Fix bitmask of the output for JNI of lists::drop_list_duplicates (#10210) @ttnghia
• Fix compile error in binaryop/compiled/util.cpp (#10209) @ttnghia
• Skip ORC and Parquet readers' benchmark cases that are not currently supported (#10194) @vuule
• Fix JNI leak of a cudf::column_view native class. (#10171) @revans2
• Enable proper Index round-tripping in orc reader and writer (#10170) @galipremsagar
• Convert Column Name to String Before Using Struct Column Factory (#10156) @isVoid
• Preserve the correct ListDtype while creating an identical empty column (#10151) @galipremsagar
• benchmark fixture - static object pointer fix (#10145) @karthikeyann
• Fix UDF Caching (#10133) @brandon-b-miller
• Raise duplicate column error in DataFrame.rename (#10120) @galipremsagar
• Fix flaky memory usage test by guaranteeing array size. (#10114) @vyasr
• Encode values from python callback for C++ (#10103) @jdye64
• Add check for regex instructions causing an infinite-loop (#10095) @davidwendt
• Remove metadata singleton from nvtext normalizer (#10090) @davidwendt
• Column equality testing fixes (#10011) @brandon-b-miller
• Pin libcudf runtime dependency for cudf / libcudf-kafka nightlies (#9847) @charlesbluca

📖 Documentation

• Fix documentation for DataFrame.corr and Series.corr. (#10493) @bdice
• Add cut to API docs (#10479) @shwina
• Remove documentation for methods removed in #10124. (#10366) @bdice
• Fix documentation issues (#10306) @ajschmidt8
• Fix fixed_point binary operation documentation (#10198) @codereport
• Remove cleaned up methods from docs (#10189) @galipremsagar
• Update developer guide to recommend no default stream parameter. (#10136) @bdice
• Update benchmarking guide to use NVBench. (#10093) @bdice

🚀 New Features

• Add StringIO support to read_text (#10465) @cwharris
• Add support for tdigest and merge_tdigest aggregations through cudf::reduce (#10433) @nvdbaranec
• JNI support for Collect Ops in Reduction (#10427) @sperlingxx
• Enable read_text with dask_cudf using byte_range (#10407) @ChrisJar
• Add cudf::stable_sort_by_key (#10387) @PointKernel
• Implement maps_column_view abstraction over LIST<STRUCT<K,V>> (#10380) @mythrocks
• Support Java bindings for Avro reader (#10373) @HaoYang670
• Refactor stream compaction APIs (#10370) @PointKernel
• Support collect aggregations in reduction (#10353) @sperlingxx
• Refactor array_ufunc for Index and unify across all classes (#10346) @vyasr
• Add JNI for extract_list_element with index column (#10341) @firestarman
• Support min and max operations for structs in rolling window (#10332) @ttnghia
• Add device create_sequence_table for benchmarks (#10300) @karthikeyann
• Enable numpy ufuncs for DataFrame (#10287) @vyasr
• move input generation for json benchmark to device (#10281) @karthikeyann
• move input generation for type dispatcher benchmark to device (#10280) @karthikeyann
• move input generation for copy benchmark to device (#10279) @karthikeyann
• generate url decode benchmark input in device (#10278) @karthikeyann
• device input generation in join bench (#10277) @karthikeyann
• Add nvtext::byte_pair_encoding API (#10270) @davidwendt
• Prevent internal usage of expensive APIs (#10263) @vyasr
• Column to JCUDF row for tables with strings (#10235) @hyperbolic2346
• Support percent_rank() aggregation (#10227) @mythrocks
• Refactor Series.array_ufunc (#10217) @vyasr
• Reduce pytest runtime (#10203) @brandon-b-miller
• Add regex flags parameter to python cudf strings split (#10185) @davidwendt
• Support for MOD, PMOD and PYMOD for decimal32/64/128 (#10179) @codereport
• Adding string row size iterator for row to column and column to row conversion (#10157) @hyperbolic2346
• Add file size counter to cuIO benchmarks (#10154) @vuule
• byte_range support for multibyte_split/read_text (#10150) @cwharris
• Add JNI for strings::split_re and strings::split_record_re (#10139) @ttnghia
• Add maxSplit parameter to Java binding for strings:split (#10137) @ttnghia
• Add libcudf strings split API that accepts regex pattern (#10128) @davidwendt
• generate benchmark input in device (#10109) @karthikeyann
• Avoid nan_as_null op if nan_count is 0 (#10082) @galipremsagar
• Add Dataframe and Index nunique (#10077) @martinfalisse
• Support nanosecond timestamps in parquet (#10063) @PointKernel
• Java bindings for mixed semi and anti joins (#10040) @jlowe
• Implement mixed equality/conditional semi/anti joins (#10037) @vyasr
• Optimize compaction operations (#10030) @PointKernel
• Support args= in Series.apply (#9982) @brandon-b-miller
• Add cudf::strings::findall_record API (#9911) @davidwendt
• Add covariance for sort groupby (python) (#9889) @mayankanand007
• Implement DataFrame diff() (#9817) @skirui-source
• Implement DataFrame pct_change (#9805) @skirui-source
• Support segmented reductions and null mask reductions (#9621) @isVoid
• Add 'spearman' correlation method for dataframe.corr and series.corr (#7141) @dominicshanshan

🛠️ Improvements

• Add scipy skip for a test (#10502) @galipremsagar
• Temporarily disable new ops-bot functionality (#10496) @ajschmidt8
• Include <cstddef> to fix compilation of parquet reader on GCC 11. (#10483) @bdice
• Pin dask and distributed (#10481) @galipremsagar
• MD5 refactoring. (#10445) @bdice
• Remove or split up Frame methods that use the index (#10439) @vyasr
• Centralization of tdigest aggregation code. (#10422) @nvdbaranec
• Simplify column binary operations (#10421) @vyasr
• Add .github/ops-bot.yaml config file (#10420) @ajschmidt8
• Use list of columns for methods in Groupby.pyx (#10419) @isVoid
• Remov...

v22.02.00

🚨 Breaking Changes

• ORC writer API changes for granular statistics (#10058) @mythrocks
• decimal128 Support for to/from_arrow (#9986) @codereport
• Remove deprecated method one_hot_encoding (#9977) @isVoid
• Remove str.subword_tokenize (#9968) @VibhuJawa
• Remove deprecated method parameter from merge and join. (#9944) @bdice
• Remove deprecated method DataFrame.hash_columns. (#9943) @bdice
• Remove deprecated method Series.hash_encode. (#9942) @bdice
• Refactoring ceil/round/floor code for datetime64 types (#9926) @mayankanand007
• Introduce nan_as_null parameter for cudf.Index (#9893) @galipremsagar
• Add regex_flags parameter to strings replace_re functions (#9878) @davidwendt
• Break tie for top categorical columns in Series.describe (#9867) @isVoid
• Add partitioning support in parquet writer (#9810) @devavret
• Move drop_duplicates, drop_na, _gather, take to IndexFrame and create their _base_index counterparts (#9807) @isVoid
• Raise temporary error for decimal128 types in parquet reader (#9804) @galipremsagar
• Change default dtype of all nulls column from float to object (#9803) @galipremsagar
• Remove unused masked udf cython/c++ code (#9792) @brandon-b-miller
• Pick smallest decimal type with required precision in ORC reader (#9775) @vuule
• Add decimal128 support to Parquet reader and writer (#9765) @vuule
• Refactor TableTest assertion methods to a separate utility class (#9762) @jlowe
• Use cuFile direct device reads/writes by default in cuIO (#9722) @vuule
• Match pandas scalar result types in reductions (#9717) @brandon-b-miller
• Add parameters to control row group size in Parquet writer (#9677) @vuule
• Refactor bit counting APIs, introduce valid/null count functions, and split host/device side code for segmented counts. (#9588) @bdice
• Add support for decimal128 in cudf python (#9533) @galipremsagar
• Implement lists::index_of() to find positions in list rows (#9510) @mythrocks
• Rewriting row/column conversions for Spark <-> cudf data conversions (#8444) @hyperbolic2346

🐛 Bug Fixes

• Add check for negative stripe index in ORC reader (#10074) @vuule
• Update Java tests to expect DECIMAL128 from Arrow (#10073) @jlowe
• Avoid index materialization when DataFrame is created with un-named Series objects (#10071) @galipremsagar
• fix gcc 11 compilation errors (#10067) @rongou
• Fix columns ordering issue in parquet reader (#10066) @galipremsagar
• Fix dataframe setitem with ndarray types (#10056) @galipremsagar
• Remove implicit copy due to conversion from cudf::size_type and size_t (#10045) @robertmaynard
• Include <optional> in headers that use std::optional (#10044) @robertmaynard
• Fix repr and concat of StructColumn (#10042) @galipremsagar
• Include row group level stats when writing ORC files (#10041) @vuule
• build.sh respects the --build_metrics and --incl_cache_stats flags (#10035) @robertmaynard
• Fix memory leaks in JNI native code. (#10029) @mythrocks
• Update JNI to use new arena mr constructor (#10027) @rongou
• Fix null check when comparing structs in arg_min operation of reduction/groupby (#10026) @ttnghia
• Wrap CI script shell variables in quotes to fix local testing. (#10018) @bdice
• cudftestutil no longer propagates compiler flags to external users (#10017) @robertmaynard
• Remove CUDA_DEVICE_CALLABLE macro usage (#10015) @hyperbolic2346
• Add missing list filling header in meta.yaml (#10007) @devavret
• Fix conda recipes for custreamz & cudf_kafka (#10003) @ajschmidt8
• Fix matching regex word-boundary (\b) in strings replace (#9997) @davidwendt
• Fix null check when comparing structs in min and max reduction/groupby operations (#9994) @ttnghia
• Fix octal pattern matching in regex string (#9993) @davidwendt
• decimal128 Support for to/from_arrow (#9986) @codereport
• Fix groupby shift/diff/fill after selecting from a GroupBy (#9984) @shwina
• Fix the overflow problem of decimal rescale (#9966) @sperlingxx
• Use default value for decimal precision in parquet writer when not specified (#9963) @devavret
• Fix cudf java build error. (#9958) @firestarman
• Use gpuci_mamba_retry to install local artifacts. (#9951) @bdice
• Fix regression HostColumnVectorCore requiring native libs (#9948) @jlowe
• Rename aggregate_metadata in writer to fix name collision (#9938) @devavret
• Fixed issue with percentile_approx where output tdigests could have uninitialized data at the end. (#9931) @nvdbaranec
• Resolve racecheck errors in ORC kernels (#9916) @vuule
• Fix the java build after parquet partitioning support (#9908) @revans2
• Fix compilation of benchmark for parquet writer. (#9905) @bdice
• Fix a memcheck error in ORC writer (#9896) @vuule
• Introduce nan_as_null parameter for cudf.Index (#9893) @galipremsagar
• Fix fallback to sort aggregation for grouping only hash aggregate (#9891) @abellina
• Add zlib to cudfjni link when using static libcudf library dependency (#9890) @jlowe
• TimedeltaIndex constructor raises an AttributeError. (#9884) @skirui-source
• Fix cudf.Scalar string datetime construction (#9875) @brandon-b-miller
• Load libcufile.so with RTLD_NODELETE flag (#9872) @vuule
• Break tie for top categorical columns in Series.describe (#9867) @isVoid
• Fix null handling for structs min and arg_min in groupby, groupby scan, reduction, and inclusive_scan (#9864) @ttnghia
• Add one-level list encoding support in parquet reader (#9848) @PointKernel
• Fix an out-of-bounds read in validity copying in contiguous_split. (#9842) @nvdbaranec
• Fix join of MultiIndex to Index with one column and overlapping name. (#9830) @vyasr
• Fix caching in Series.applymap (#9821) @brandon-b-miller
• Enforce boolean ascending for dask-cudf sort_values (#9814) @charlesbluca
• Fix ORC writer crash with empty input columns (#9808) @vuule
• Change default dtype of all nulls column from float to object (#9803) @galipremsagar
• Load native dependencies when Java ColumnView is loaded (#9800) @jlowe
• Fix dtype-argument bug in dask_cudf read_csv (#9796) @rjzamora
• Fix overflow for min calculation in strings::from_timestamps (#9793) @revans2
• Fix memory error due to lambda return type deduction limitation (#9778) @karthikeyann
• Revert regex $/EOL end-of-string new-line special case handling (#9774) @davidwendt
• Fix missing streams (#9767) @karthikeyann
• Fix make_empty_scalar_like on list_type (#9759) @sperlingxx
• Update cmake and conda to 22.02 (#9746) @devavret
• Fix out-of-bounds memory write in decimal128-to-string conversion (#9740) @davidwendt
• Match pandas scalar result types in reductions (#9717) @brandon-b-miller
• Fix regex non-multiline EOL/$ matching strings ending with a new-line (#9715) @davidwendt
• Fixed build by adding more checks for int8, int16 (#9707) @razajafri
• Fix null handling when boolean dtype is passed (#9691) @galipremsagar
• Fix stream usage in segmented_gather() (#9679) @mythrocks

📖 Documentation

• Update decimal dtypes related docs entries (#10072) @galipremsagar
• Fix regex doc describing hexadecimal escape characters (#10009) @davidwendt
• Fix cudf compilation instructions. (#9956) @esoha-nvidia
• Fix see also links for IO APIs (#9895) @galipremsagar
• Fix build instructions for libcudf doxygen (#9837) @davidwendt
• Fix some doxygen warnings and add missing documentation (#9770) @karthikeyann
• update cuda version in local build (#9736) @karthikeyann
• Fix doxygen for enum types in libcudf (#9724) @davidwendt
• Spell check fixes (#9682) @karthikeyann
• Fix links in C++ Developer Guide. (#9675) @bdice

🚀 New Features

• Remove libcudacxx patch needed for nvcc 11.4 (#10057) @robertmaynard
• Allow CuPy 10 (#10048) @jakirkham
• Add in support for NULL_LOGICAL_AND and NULL_LOGICAL_OR binops (#10016) @revans2
• Add groupby.transform (only support for aggregations) (#10005) @shwina
• Add partitioning support to Parquet chunked writer (#10000) @devavret
• Add jni for sequences (#9972) @wbo4958
• Java bindings for mixed left, inner, and full joins (#9941) @jlowe
• Java bindings for JSON reader support (#9940) @wbo4958
• Enable transpose for string columns in cudf python (#9937) @galipremsagar
• Support structs for cudf::contains with column/scalar input (#9929) @ttnghia
• Implement mixed equality/conditional joins (#9917) @vyasr
• Add cudf::strings::extract_all API (#9909) @davidwendt
• Implement JNI for cudf::scatter APIs (#9903) @ttnghia
• JNI: Function to copy and set validity from bool column. (#9901) @mythrocks
• Add dictionary support to cudf::copy_if_else (#9887) @davidwendt
• add run_benchmarks target for running benchmarks with json output (#9879) @karthikeyann
• Add regex_flags parameter to strings replace_re functions (#9878) @davidwendt
• Add_suffix and add_prefix for DataFrames and Series (#9846) @mayankanand007
• Add JNI for cudf::drop_duplicates (#9841) @ttnghia
• Implement per-list sequence (#9839) @ttnghia
• adding series.transpose (#9835) @mayankanand007
• Adding support for Series.autocorr (#9833) @mayankanand007
• Support round operation on datetime64 datatypes (#9820) @mayankanand007
• Add partitioning support in parquet writer (#9810) @devavret
• Raise temporary error for decimal128 types in parquet reader (#9804) @galipremsagar
• Add decimal128 support to Parquet reader and writer (#9765) @vuule
• Optimize groupby::scan (#9754) @PointKernel
• Add sample JNI API (#9728) @res-life
• Support min and max in inclusive scan for structs (#9725) @ttnghia
• Add first and last method to IndexedFrame (#9710) @isVoid
• Support min and max reduction for structs (#9697) @ttnghia
• Add parameters to control row group size in Parquet writer (#9677) @vuule
• Run compute-sanitizer in nightly build (#9641) @karthikeyann
• Implement Series.datetime.floor (#9571) @skirui-source
• ceil/floor for DatetimeIndex (#9554) @mayankanand007
• Add support for decimal128 in cudf python (#9533) @galipremsagar
• ...

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v21.12.01

v21.12.01