v0.19.0

🚨 Breaking Changes

• Allow hash_partition to take a seed value (#7771) @magnatelee
• Allow merging index column with data column using keyword "on" (#7736) @skirui-source
• Change JNI API to avoid loading native dependencies when creating sort order classes. (#7729) @revans2
• Replace device_vector with device_uvector in null_mask (#7715) @harrism
• Don't identify decimals as strings. (#7710) @vyasr
• Fix Java Parquet write after writer API changes (#7655) @revans2
• Convert cudf::concatenate APIs to use spans and device_uvector (#7621) @harrism
• Update missing docstring examples in python public APIs (#7546) @galipremsagar
• Remove unneeded step parameter from strings::detail::copy_slice (#7525) @davidwendt
• Rename ARROW_STATIC_LIB because it conflicts with one in FindArrow.cmake (#7518) @trxcllnt
• Match Pandas logic for comparing two objects with nulls (#7490) @brandon-b-miller
• Add struct support to parquet writer (#7461) @devavret
• Join APIs that return gathermaps (#7454) @shwina
• fixed_point + cudf::binary_operation API Changes (#7435) @codereport
• Fix BUG: Exception when PYTHONOPTIMIZE=2 (#7434) @skirui-source
• Change nvtext::load_vocabulary_file to return a unique ptr (#7424) @davidwendt
• Refactor strings column factories (#7397) @harrism
• Use CMAKE_CUDA_ARCHITECTURES (#7391) @robertmaynard
• Upgrade pandas to 1.2 (#7375) @galipremsagar
• Rename logical_cast to bit_cast and allow additional conversions (#7373) @ttnghia
• Rework libcudf CMakeLists.txt to export targets for CPM (#7107) @trxcllnt

🐛 Bug Fixes

• Fix a NameError in meta dispatch API (#7996) @galipremsagar
• Reindex in DataFrame.__setitem__ (#7957) @galipremsagar
• jitify direct-to-cubin compilation and caching. (#7919) @cwharris
• Use dynamic cudart for nvcomp in java build (#7896) @abellina
• fix "incompatible redefinition" warnings (#7894) @cwharris
• cudf consistently specifies the cuda runtime (#7887) @robertmaynard
• disable verbose output for jitify_preprocess (#7886) @cwharris
• CMake jit_preprocess_files function only runs when needed (#7872) @robertmaynard
• Push DeviceScalar construction into cython for list.contains (#7864) @brandon-b-miller
• cudf now sets an install rpath of $ORIGIN (#7863) @robertmaynard
• Don't install Thrust examples, tests, docs, and python files (#7811) @robertmaynard
• Sort by index in groupby tests more consistently (#7802) @shwina
• Revert "Update conda recipes pinning of repo dependencies (#7743)" (#7793) @raydouglass
• Add decimal column handling in copy_type_metadata (#7788) @shwina
• Add column names validation in parquet writer (#7786) @galipremsagar
• Fix Java explode outer unit tests (#7782) @jlowe
• Fix compiler warning about non-POD types passed through ellipsis (#7781) @jrhemstad
• User resource fix for replace_nulls (#7769) @magnatelee
• Fix type dispatch for columnar replace_nulls (#7768) @jlowe
• Add ignore_order parameter to dask-cudf concat dispatch (#7765) @galipremsagar
• Fix slicing and arrow representations of decimal columns (#7755) @vyasr
• Fixing issue with explode_outer position not nulling position entries of null rows (#7754) @hyperbolic2346
• Implement scatter for struct columns (#7752) @ttnghia
• Fix data corruption in string columns (#7746) @galipremsagar
• Fix string length in stripe dictionary building (#7744) @kaatish
• Update conda recipes pinning of repo dependencies (#7743) @mike-wendt
• Enable dask dispatch to cuDF's is_categorical_dtype for cuDF objects (#7740) @brandon-b-miller
• Fix dictionary size computation in ORC writer (#7737) @vuule
• Fix cudf::cast overflow for decimal64 to int32_t or smaller in certain cases (#7733) @codereport
• Change JNI API to avoid loading native dependencies when creating sort order classes. (#7729) @revans2
• Disable column_view data accessors for unsupported types (#7725) @jrhemstad
• Materialize RangeIndex when index=True in parquet writer (#7711) @galipremsagar
• Don't identify decimals as strings. (#7710) @vyasr
• Fix return type of DataFrame.argsort (#7706) @galipremsagar
• Fix/correct cudf installed package requirements (#7688) @robertmaynard
• Fix SparkMurmurHash3_32 hash inconsistencies with Apache Spark (#7672) @jlowe
• Fix ORC reader issue with reading empty string columns (#7656) @rgsl888prabhu
• Fix Java Parquet write after writer API changes (#7655) @revans2
• Fixing empty null lists throwing explode_outer for a loop. (#7649) @hyperbolic2346
• Fix internal compiler error during JNI Docker build (#7645) @jlowe
• Fix Debug build break with device_uvectors in grouped_rolling.cu (#7633) @mythrocks
• Parquet reader: Fix issue when using skip_rows on non-nested columns containing nulls (#7627) @nvdbaranec
• Fix ORC reader for empty DataFrame/Table (#7624) @rgsl888prabhu
• Fix specifying GPU architecture in JNI build (#7612) @jlowe
• Fix ORC writer OOM issue (#7605) @vuule
• Fix 0.18 --> 0.19 automerge (#7589) @kkraus14
• Fix ORC issue with incorrect timestamp nanosecond values (#7581) @vuule
• Fix missing Dask imports (#7580) @kkraus14
• CMAKE_CUDA_ARCHITECTURES doesn't change when build-system invokes cmake (#7579) @robertmaynard
• Another fix for offsets_end() iterator in lists_column_view (#7575) @ttnghia
• Fix ORC writer output corruption with string columns (#7565) @vuule
• Fix cudf::lists::sort_lists failing for sliced column (#7564) @ttnghia
• FIX Fix Anaconda upload args (#7558) @dillon-cullinan
• Fix index mismatch issue in equality related APIs (#7555) @galipremsagar
• FIX Revert gpuci_conda_retry on conda file output locations (#7552) @dillon-cullinan
• Fix offset_end iterator for lists_column_view, which was not correctl… (#7551) @ttnghia
• Fix no such file dlpack.h error when build libcudf (#7549) @chenrui17
• Update missing docstring examples in python public APIs (#7546) @galipremsagar
• Decimal32 Build Fix (#7544) @razajafri
• FIX Retry conda output location (#7540) @dillon-cullinan
• fix missing renames of dask git branches from master to main (#7535) @kkraus14
• Remove detail from device_span (#7533) @rwlee
• Change dask and distributed branch to main (#7532) @dantegd
• Update JNI build to use CUDF_USE_ARROW_STATIC (#7526) @jlowe
• Make sure rmm::rmm CMake target is visibile to cudf users (#7524) @robertmaynard
• Fix contiguous_split not properly handling output partitions > 2 GB. (#7515) @nvdbaranec
• Change jit launch to safe_launch (#7510) @devavret
• Fix comparison between Datetime/Timedelta columns and NULL scalars (#7504) @brandon-b-miller
• Fix off-by-one error in char-parallel string scalar replace (#7502) @jlowe
• Fix JNI deprecation of all, put it on the wrong version before (#7501) @revans2
• Fix Series/Dataframe Mixed Arithmetic (#7491) @brandon-b-miller
• Fix JNI build after removal of libcudf sub-libraries (#7486) @jlowe
• Correctly compile benchmarks (#7485) @robertmaynard
• Fix bool column corruption with ORC Reader (#7483) @rgsl888prabhu
• Fix __repr__ for categorical dtype (#7476) @galipremsagar
• Java cleaner synchronization (#7474) @abellina
• Fix java float/double parsing tests (#7473) @revans2
• Pass stream and user resource to make_default_constructed_scalar (#7469) @magnatelee
• Improve stability of dask_cudf.DataFrame.var and dask_cudf.DataFrame.std (#7453) @rjzamora
• Missing device_storage_dispatch change affecting cudf::gather (#7449) @codereport
• fix cuFile JNI compile errors (#7445) @rongou
• Support Series.__setitem__ with key to a new row (#7443) @isVoid
• Fix BUG: Exception when PYTHONOPTIMIZE=2 (#7434) @skirui-source
• Make inclusive scan safe for cases with leading nulls (#7432) @magnatelee
• Fix typo in list_device_view::pair_rep_end() (#7423) @mythrocks
• Fix string to double conversion and row equivalent comparison (#7410) @ttnghia
• Fix thrust failure when transfering data from device_vector to host_vector with vectors of size 1 (#7382) @ttnghia
• Fix std::exeception catch-by-reference gcc9 compile error (#7380) @davidwendt
• Fix skiprows issue with ORC Reader (#7359) @rgsl888prabhu
• fix Arrow CMake file (#7358) @rongou
• Fix lists::contains() for NaN and Decimals (#7349) @mythrocks
• Handle cupy array in Dataframe.__setitem__ (#7340) @galipremsagar
• Fix invalid-device-fn error in cudf::strings::replace_re with multiple regex's (#7336) @davidwendt
• FIX Add codecov upload block to gpu script (#6860) @dillon-cullinan

📖 Documentation

• Fix join API doxygen (#7890) @shwina
• Add Resources to README. (#7697) @bdice
• Add isin examples in Docstring (#7479) @galipremsagar
• Resolving unlinked type shorthands in cudf doc (#7416) @isVoid
• Fix typo in regex.md doc page (#7363) @davidwendt
• Fix incorrect strings_column_view::chars_size documentation (#7360) @jlowe

🚀 New Features

• Enable basic reductions for decimal columns (#7776) @ChrisJar
• Enable join on decimal columns (#7764) @ChrisJar
• Allow merging index column with data column using keyword "on" (#7736) @skirui-source
• Implement DecimalColumn + Scalar and add cudf.Scalars of Decimal64Dtype (#7732) @brandon-b-miller
• Add support for unique groupby aggregation (#7726) @shwina
• Expose libcudf's label_bins function to cudf (#7724) @vyasr
• Adding support for equi-join on struct (#7720) @hyperbolic2346
• Add decimal column comparison operations (#7716) @isVoid
• Implement scan operations for decimal columns (#7707) @ChrisJar
• Enable typecasting between decimal and int (#7691) @ChrisJar
• Enable decimal support in parquet writer (#7673) @devavret
• Adds list.unique API (#7664) @isVoid
• Fix NaN handling in drop_list_duplicates (#7662) @ttnghia
• Add lists.sort_values API (#7657) @isVoid
• Add is_integer API that can check for the validity of a string-to-integer conversion (#7642) @ttnghia
• Adds explode API (#7607) @isVoid
• Adds list.take, python binding for cudf::lists::segmented_gather (#7591) @isVoid
• Implement cudf::label_bins() (#7554) @vyasr
• Add Python b...

v0.18.1

patch release v0.18.1

v0.18.0

Breaking Changes 🚨

• Default groupby to sort=False (#7180) @isVoid
• Add libcudf API for parsing of ORC statistics (#7136) @vuule
• Replace ORC writer api with class (#7099) @rgsl888prabhu
• Pack/unpack functionality to convert tables to and from a serialized format. (#7096) @nvdbaranec
• Replace parquet writer api with class (#7058) @rgsl888prabhu
• Add days check to cudf::is_timestamp using cuda::std::chrono classes (#7028) @davidwendt
• Fix default parameter values of write_csv and write_parquet (#6967) @vuule
• Align Series.groupby API to match Pandas (#6964) @kkraus14
• Share factorize implementation with Index and cudf module (#6885) @brandon-b-miller

Bug Fixes 🐛

• Remove incorrect std::move call on return variable (#7319) @davidwendt
• Fix failing CI ORC test (#7313) @vuule
• Disallow constructing frames from a ColumnAccessor (#7298) @shwina
• fix java cuFile tests (#7296) @rongou
• Fix style issues related to NumPy (#7279) @shwina
• Fix bug when iloc slice terminates at before-the-zero position (#7277) @isVoid
• Fix copying dtype metadata after calling libcudf functions (#7271) @shwina
• Move lists utility function definition out of header (#7266) @mythrocks
• Throw if bool column would cause incorrect result when writing to ORC (#7261) @vuule
• Use uvector in replace_nulls; Fix sort_helper::grouped_value doc (#7256) @isVoid
• Remove floating point types from cudf::sort fast-path (#7250) @davidwendt
• Disallow picking output columns from nested columns. (#7248) @devavret
• Fix loc for Series with a MultiIndex (#7243) @shwina
• Fix Arrow column test leaks (#7241) @tgravescs
• Fix test column vector leak (#7238) @kuhushukla
• Fix some bugs in java scalar support for decimal (#7237) @revans2
• Improve assert_eq handling of scalar (#7220) @isVoid
• Fix missing null_count() comparison in test framework and related failures (#7219) @nvdbaranec
• Remove floating point types from radix sort fast-path (#7215) @davidwendt
• Fixing parquet benchmarks (#7214) @rgsl888prabhu
• Handle various parameter combinations in replace API (#7207) @galipremsagar
• Export mock aws credentials for s3 tests (#7176) @ayushdg
• Add MultiIndex.rename API (#7172) @isVoid
• Fix importing list & struct types in from_arrow (#7162) @galipremsagar
• Fixing parquet precision writing failing if scale is equal to precision (#7146) @hyperbolic2346
• Update s3 tests to use moto_server (#7144) @ayushdg
• Fix JIT cache multi-process test flakiness in slow drives (#7142) @devavret
• Fix compilation errors in libcudf (#7138) @galipremsagar
• Fix compilation failure caused by -Wall addition. (#7134) @codereport
• Add informative error message for sep in CSV writer (#7095) @galipremsagar
• Add JIT cache per compute capability (#7090) @devavret
• Implement __hash__ method for ListDtype (#7081) @galipremsagar
• Only upload packages that were built (#7077) @raydouglass
• Fix comparisons between Series and cudf.NA (#7072) @brandon-b-miller
• Handle nan values correctly in Series.one_hot_encoding (#7059) @galipremsagar
• Add unstack() support for non-multiindexed dataframes (#7054) @isVoid
• Fix read_orc for decimal type (#7034) @rgsl888prabhu
• Fix backward compatibility of loading a 0.16 pkl file (#7033) @galipremsagar
• Decimal casts in JNI became a NOOP (#7032) @revans2
• Restore usual instance/subclass checking to cudf.DateOffset (#7029) @shwina
• Add days check to cudf::is_timestamp using cuda::std::chrono classes (#7028) @davidwendt
• Fix to_csv delimiter handling of timestamp format (#7023) @davidwendt
• Pin librdkakfa to gcc 7 compatible version (#7021) @raydouglass
• Fix fillna & dropna to also consider np.nan as a missing value (#7019) @galipremsagar
• Fix round operator's HALF_EVEN computation for negative integers (#7014) @nartal1
• Skip Thrust sort patch if already applied (#7009) @harrism
• Fix cudf::hash_partition for decimal32 and decimal64 (#7006) @codereport
• Fix Thrust unroll patch command (#7002) @harrism
• Fix loc behaviour when key of incorrect type is used (#6993) @shwina
• Fix int to datetime conversion in csv_read (#6991) @kaatish
• fix excluding cufile tests by default (#6988) @rongou
• Fix java cufile tests when cufile is not installed (#6987) @revans2
• Make cudf::round for fixed_point when scale = -decimal_places a no-op (#6975) @codereport
• Fix type comparison for java (#6970) @revans2
• Fix default parameter values of write_csv and write_parquet (#6967) @vuule
• Align Series.groupby API to match Pandas (#6964) @kkraus14
• Fix timestamp parsing in ORC reader for timezones without transitions (#6959) @vuule
• Fix typo in numerical.py (#6957) @rgsl888prabhu
• fixed_point_value double-shifts in fixed_point construction (#6950) @codereport
• fix libcu++ include path for jni (#6948) @rongou
• Fix groupby agg/apply behaviour when no key columns are provided (#6945) @shwina
• Avoid inserting null elements into join hash table when nulls are treated as unequal (#6943) @hyperbolic2346
• Fix cudf::merge gtest for dictionary columns (#6942) @davidwendt
• Pass numeric scalars of the same dtype through numeric binops (#6938) @brandon-b-miller
• Fix N/A detection for empty fields in CSV reader (#6922) @vuule
• Fix rmm_mode=managed parameter for gtests (#6912) @davidwendt
• Fix nullmask offset handling in parquet and orc writer (#6889) @kaatish
• Correct the sampling range when sampling with replacement (#6884) @ChrisJar
• Handle nested string columns with no children in contiguous_split. (#6864) @nvdbaranec
• Fix columns & index handling in dataframe constructor (#6838) @galipremsagar

Documentation 📖

• Update readme (#7318) @shwina
• Fix typo in cudf.core.column.string.extract docs (#7253) @adelevie
• Update doxyfile project number (#7161) @davidwendt
• Update 10 minutes to cuDF and CuPy with new APIs (#7158) @ChrisJar
• Cross link RMM & libcudf Doxygen docs (#7149) @ajschmidt8
• Add documentation for support dtypes in all IO formats (#7139) @galipremsagar
• Add groupby docs (#7100) @shwina
• Update cudf python docstrings with new null representation (<NA>) (#7050) @galipremsagar
• Make Doxygen comments formatting consistent (#7041) @vuule
• Add docs for working with missing data (#7010) @galipremsagar
• Remove warning in from_dlpack and to_dlpack methods (#7001) @miguelusque
• libcudf Developer Guide (#6977) @harrism
• Add JNI wrapper for the cuFile API (GDS) (#6940) @rongou

New Features 🚀

• Support numeric_only field for rank() (#7213) @isVoid
• Add support for cudf::binary_operation TRUE_DIV for decimal32 and decimal64 (#7198) @codereport
• Implement COLLECT rolling window aggregation (#7189) @mythrocks
• Add support for array-like inputs in cudf.get_dummies (#7181) @galipremsagar
• Default groupby to sort=False (#7180) @isVoid
• Add libcudf lists column count_elements API (#7173) @davidwendt
• Implement cudf::group_by (sort) for decimal32 and decimal64 (#7169) @codereport
• Add encoding and compression argument to CSV writer (#7168) @VibhuJawa
• cudf::rolling_window SUM support for decimal32 and decimal64 (#7147) @codereport
• Adding support for explode to cuDF (#7140) @hyperbolic2346
• Add libcudf API for parsing of ORC statistics (#7136) @vuule
• update GDS/cuFile location for 0.9 release (#7131) @rongou
• Add Segmented sort (#7122) @karthikeyann
• Add cudf::binary_operation NULL_MIN, NULL_MAX & NULL_EQUALS for decimal32 and decimal64 (#7119) @codereport
• Add scale and value methods to fixed_point (#7109) @codereport
• Replace ORC writer api with class (#7099) @rgsl888prabhu
• Pack/unpack functionality to convert tables to and from a serialized format. (#7096) @nvdbaranec
• Improve digitize API (#7071) @isVoid
• Add List types support in data generator (#7064) @galipremsagar
• cudf::scan support for decimal32 and decimal64 (#7063) @codereport
• cudf::rolling ROW_NUMBER support for decimal32 and decimal64 (#7061) @codereport
• Replace parquet writer api with class (#7058) @rgsl888prabhu
• Support contains() on lists of primitives (#7039) @mythrocks
• Implement cudf::rolling for decimal32 and decimal64 (#7037) @codereport
• Add ffill and bfill to string columns (#7036) @isVoid
• Enable round in cudf for DataFrame and Series (#7022) @ChrisJar
• Extend replace_nulls_policy to string and dictionary type (#7004) @isVoid
• Add segmented_gather(list_column, gather_list) (#7003) @karthikeyann
• Add method field to fillna for fixed width columns (#6998) @isVoid
• Manual merge of branch 0.17 into branch 0.18 (#6995) @shwina
• Implement cudf::reduce for decimal32 and decimal64 (part 2) (#6980) @codereport
• Add Ufunc alias look up for appropriate numpy ufunc dispatching (#6973) @VibhuJawa
• Add pytest-xdist to dev environment.yml (#6958) @galipremsagar
• Add Index.set_names api (#6929) @galipremsagar
• Add replace_null API with replace_policy parameter, fixed_width column support (#6907) @isVoid
• Share factorize implementation with Index and cudf module (#6885) @brandon-b-miller
• Implement update() function (#6883) @skirui-source
• Add groupby idxmin, idxmax aggregation (#6856) @karthikeyann
• Implement cudf::reduce for decimal32 and decimal64 (part 1) (#6814) @codereport
• Implement cudf.DateOffset for months (#6775) @brandon-b-miller
• Add Python DecimalColumn (#6715) @shwina
• Add dictionary support to libcudf groupby functions (#6585) @davidwendt

Improvements 🛠️

• Update stale GHA with exemptions & new labels (#7395) @mike-wendt
• Add GHA to mark issues/prs as stale/rotten (#7388) @Ethyling
• Unpin from numpy < 1.20 (#7335) @shwina
• Prepare Changelog for Automation (#7309) @galipremsagar
• Prepare Changelog for Automation (#7272) @ajschmidt8
• Add JNI support for converting Arrow buffers to CUDF ColumnVectors (#7222) @tgravescs
• Add coverage for skiprows and num_rows in parquet rea...

v0.17.0

v0.17.0 Release

[NIGHTLY] v0.18.0

🔗 Links

• Development Branch
• Compare with main branch

🚨 Breaking Changes

• Default groupby to sort=False (#7180) @isVoid
• Add libcudf API for parsing of ORC statistics (#7136) @vuule
• Replace ORC writer api with class (#7099) @rgsl888prabhu
• Pack/unpack functionality to convert tables to and from a serialized format. (#7096) @nvdbaranec
• Replace parquet writer api with class (#7058) @rgsl888prabhu
• Add days check to cudf::is_timestamp using cuda::std::chrono classes (#7028) @davidwendt
• Fix default parameter values of write_csv and write_parquet (#6967) @vuule
• Align Series.groupby API to match Pandas (#6964) @kkraus14
• Share factorize implementation with Index and cudf module (#6885) @brandon-b-miller

🐛 Bug Fixes

• Fix null-bounds calculation for ranged window queries (#7568) @mythrocks
• Remove incorrect std::move call on return variable (#7319) @davidwendt
• Fix failing CI ORC test (#7313) @vuule
• Disallow constructing frames from a ColumnAccessor (#7298) @shwina
• fix java cuFile tests (#7296) @rongou
• Fix style issues related to NumPy (#7279) @shwina
• Fix bug when iloc slice terminates at before-the-zero position (#7277) @isVoid
• Fix copying dtype metadata after calling libcudf functions (#7271) @shwina
• Move lists utility function definition out of header (#7266) @mythrocks
• Throw if bool column would cause incorrect result when writing to ORC (#7261) @vuule
• Use uvector in replace_nulls; Fix sort_helper::grouped_value doc (#7256) @isVoid
• Remove floating point types from cudf::sort fast-path (#7250) @davidwendt
• Disallow picking output columns from nested columns. (#7248) @devavret
• Fix loc for Series with a MultiIndex (#7243) @shwina
• Fix Arrow column test leaks (#7241) @tgravescs
• Fix test column vector leak (#7238) @kuhushukla
• Fix some bugs in java scalar support for decimal (#7237) @revans2
• Improve assert_eq handling of scalar (#7220) @isVoid
• Fix missing null_count() comparison in test framework and related failures (#7219) @nvdbaranec
• Remove floating point types from radix sort fast-path (#7215) @davidwendt
• Fixing parquet benchmarks (#7214) @rgsl888prabhu
• Handle various parameter combinations in replace API (#7207) @galipremsagar
• Export mock aws credentials for s3 tests (#7176) @ayushdg
• Add MultiIndex.rename API (#7172) @isVoid
• Fix importing list & struct types in from_arrow (#7162) @galipremsagar
• Fixing parquet precision writing failing if scale is equal to precision (#7146) @hyperbolic2346
• Update s3 tests to use moto_server (#7144) @ayushdg
• Fix JIT cache multi-process test flakiness in slow drives (#7142) @devavret
• Fix compilation errors in libcudf (#7138) @galipremsagar
• Fix compilation failure caused by -Wall addition. (#7134) @codereport
• Add informative error message for sep in CSV writer (#7095) @galipremsagar
• Add JIT cache per compute capability (#7090) @devavret
• Implement __hash__ method for ListDtype (#7081) @galipremsagar
• Only upload packages that were built (#7077) @raydouglass
• Fix comparisons between Series and cudf.NA (#7072) @brandon-b-miller
• Handle nan values correctly in Series.one_hot_encoding (#7059) @galipremsagar
• Add unstack() support for non-multiindexed dataframes (#7054) @isVoid
• Fix read_orc for decimal type (#7034) @rgsl888prabhu
• Fix backward compatibility of loading a 0.16 pkl file (#7033) @galipremsagar
• Decimal casts in JNI became a NOOP (#7032) @revans2
• Restore usual instance/subclass checking to cudf.DateOffset (#7029) @shwina
• Add days check to cudf::is_timestamp using cuda::std::chrono classes (#7028) @davidwendt
• Fix to_csv delimiter handling of timestamp format (#7023) @davidwendt
• Pin librdkakfa to gcc 7 compatible version (#7021) @raydouglass
• Fix fillna & dropna to also consider np.nan as a missing value (#7019) @galipremsagar
• Fix round operator's HALF_EVEN computation for negative integers (#7014) @nartal1
• Skip Thrust sort patch if already applied (#7009) @harrism
• Fix cudf::hash_partition for decimal32 and decimal64 (#7006) @codereport
• Fix Thrust unroll patch command (#7002) @harrism
• Fix loc behaviour when key of incorrect type is used (#6993) @shwina
• Fix int to datetime conversion in csv_read (#6991) @kaatish
• fix excluding cufile tests by default (#6988) @rongou
• Fix java cufile tests when cufile is not installed (#6987) @revans2
• Make cudf::round for fixed_point when scale = -decimal_places a no-op (#6975) @codereport
• Fix type comparison for java (#6970) @revans2
• Fix default parameter values of write_csv and write_parquet (#6967) @vuule
• Align Series.groupby API to match Pandas (#6964) @kkraus14
• Fix timestamp parsing in ORC reader for timezones without transitions (#6959) @vuule
• Fix typo in numerical.py (#6957) @rgsl888prabhu
• fixed_point_value double-shifts in fixed_point construction (#6950) @codereport
• fix libcu++ include path for jni (#6948) @rongou
• Fix groupby agg/apply behaviour when no key columns are provided (#6945) @shwina
• Avoid inserting null elements into join hash table when nulls are treated as unequal (#6943) @hyperbolic2346
• Fix cudf::merge gtest for dictionary columns (#6942) @davidwendt
• Pass numeric scalars of the same dtype through numeric binops (#6938) @brandon-b-miller
• Fix N/A detection for empty fields in CSV reader (#6922) @vuule
• Fix rmm_mode=managed parameter for gtests (#6912) @davidwendt
• Fix nullmask offset handling in parquet and orc writer (#6889) @kaatish
• Correct the sampling range when sampling with replacement (#6884) @ChrisJar
• Handle nested string columns with no children in contiguous_split. (#6864) @nvdbaranec
• Fix columns & index handling in dataframe constructor (#6838) @galipremsagar

📖 Documentation

• Update readme (#7318) @shwina
• Fix typo in cudf.core.column.string.extract docs (#7253) @adelevie
• Update doxyfile project number (#7161) @davidwendt
• Update 10 minutes to cuDF and CuPy with new APIs (#7158) @ChrisJar
• Cross link RMM & libcudf Doxygen docs (#7149) @ajschmidt8
• Add documentation for support dtypes in all IO formats (#7139) @galipremsagar
• Add groupby docs (#7100) @shwina
• Update cudf python docstrings with new null representation (<NA>) (#7050) @galipremsagar
• Make Doxygen comments formatting consistent (#7041) @vuule
• Add docs for working with missing data (#7010) @galipremsagar
• Remove warning in from_dlpack and to_dlpack methods (#7001) @miguelusque
• libcudf Developer Guide (#6977) @harrism
• Add JNI wrapper for the cuFile API (GDS) (#6940) @rongou

🚀 New Features

• Support numeric_only field for rank() (#7213) @isVoid
• Add support for cudf::binary_operation TRUE_DIV for decimal32 and decimal64 (#7198) @codereport
• Implement COLLECT rolling window aggregation (#7189) @mythrocks
• Add support for array-like inputs in cudf.get_dummies (#7181) @galipremsagar
• Default groupby to sort=False (#7180) @isVoid
• Add libcudf lists column count_elements API (#7173) @davidwendt
• Implement cudf::group_by (sort) for decimal32 and decimal64 (#7169) @codereport
• Add encoding and compression argument to CSV writer (#7168) @VibhuJawa
• cudf::rolling_window SUM support for decimal32 and decimal64 (#7147) @codereport
• Adding support for explode to cuDF (#7140) @hyperbolic2346
• Add libcudf API for parsing of ORC statistics (#7136) @vuule
• update GDS/cuFile location for 0.9 release (#7131) @rongou
• Add Segmented sort (#7122) @karthikeyann
• Add cudf::binary_operation NULL_MIN, NULL_MAX & NULL_EQUALS for decimal32 and decimal64 (#7119) @codereport
• Add scale and value methods to fixed_point (#7109) @codereport
• Replace ORC writer api with class (#7099) @rgsl888prabhu
• Pack/unpack functionality to convert tables to and from a serialized format. (#7096) @nvdbaranec
• Improve digitize API (#7071) @isVoid
• Add List types support in data generator (#7064) @galipremsagar
• cudf::scan support for decimal32 and decimal64 (#7063) @codereport
• cudf::rolling ROW_NUMBER support for decimal32 and decimal64 (#7061) @codereport
• Replace parquet writer api with class (#7058) @rgsl888prabhu
• Support contains() on lists of primitives (#7039) @mythrocks
• Implement cudf::rolling for decimal32 and decimal64 (#7037) @codereport
• Add ffill and bfill to string columns (#7036) @isVoid
• Enable round in cudf for DataFrame and Series (#7022) @ChrisJar
• Extend replace_nulls_policy to string and dictionary type (#7004) @isVoid
• Add segmented_gather(list_column, gather_list) (#7003) @karthikeyann
• Add method field to fillna for fixed width columns (#6998) @isVoid
• Manual merge of branch 0.17 into branch 0.18 (#6995) @shwina
• Implement cudf::reduce for decimal32 and decimal64 (part 2) (#6980) @codereport
• Add Ufunc alias look up for appropriate numpy ufunc dispatching (#6973) @VibhuJawa
• Add pytest-xdist to dev environment.yml (#6958) @galipremsagar
• Add Index.set_names api (#6929) @galipremsagar
• Add replace_null API with replace_policy parameter, fixed_width column support (#6907) @isVoid
• Share factorize implementation with Index and cudf module (#6885) @brandon-b-miller
• Implement update() function (#6883) @skirui-source
• Add groupby idxmin, idxmax aggregation (#6856) @karthikeyann
• Implement cudf::reduce for decimal32 and decimal64 (part 1) (#6814) @codereport
• Implement cudf.DateOffset for months (#6775) @brandon-b-miller
• Add Python DecimalColumn (#6715) @shwina
• Add dictionary support to libcudf groupby functions (#6585) @davidwendt

🛠️ Improvements

• Update stale GHA with exemptions & new labels (#7395) @mike-wendt
• Add GHA to mark issues/prs as stale/rotten (#7388) @Ethyling
• Unpin from numpy < 1.20 (#7335) @shwina
• Prep...

v0.16.0

v0.16.0 Release

v0.15.0

v0.15.0 Release