v0.22.0

Important

This package is now in maintenance mode, meaning that important bugs will be fixed if possible but we won't
add new features in the next few weeks / months.

The focus of future development is on a completely rewritten version (neopolars) that currently exists in the next branch.
The package in that branch will become the new polars package once the rewrite is complete.

Please check the GitHub issue #1152.

Breaking changes

• Updated Rust Polars to 0.45.1 (#1302).
  • The ddof argument of pl$corr() is removed.

Full Changelog: v0.21.0...v0.22.0

lib-v0.45.0

feat!: bump polars to rs-0.45.1 (#1302)

v0.21.0

Breaking changes

• Updated Rust Polars to 0.44.2 (#1271).
  • Minimum supported Rust version (MSRV) is now 1.82.0.
  • $reshape()'s nested_type argument is removed.
  • $approx_n_unique() no longer works on Categorical type.
• <Series>$compare() is removed. (#1272)

Deprecations

• Passing a single data.frame to pl$DataFrame() or pl$LazyFrame() to convert a
  data.frame to a polars DataFrame or LazyFrame is deprecated and a warning will
  be shown. Use as_polars_df() or as_polars_lf() instead (#1275).

Bug fixes

• Maintain level order when converting Enums to factors (#1252, @andyquinterom).

Full Changelog: v0.19.0...v0.21.0

lib-v0.44.0

fix: fix csv download issue on windows (#1292)

v0.20.0

Breaking changes

• Updated rust-polars to 0.43.1 (#1230).
• In pl$scan_ipc() and pl$read_ipc(), the argument memory_map is removed
  (#1230).
• In $serialize(), in the field schema, the field inner is renamed fields,
  and the fields output_schema and filter are removed (#1230).

New features

• New method $cast() for DataFrame and LazyFrame (#1219).
• New argument strict in $drop() to determine whether unknown column names
  should trigger an error (#1220).
• New method $to_dummies() for DataFrame (#1225).
• New argument include_file_paths in pl$scan_csv() and pl$read_csv() (#1235).
• New method $join_where() for DataFrame and LazyFrame to perform
  inequality joins (#1237).

Bug fixes

• Converting data of datatype Null to R doesn't error anymore. It now creates
  a column filled with NA (#1217).

New Contributors

• @collioud made their first contribution in #1238

Full Changelog: v0.19.0...v0.20.0

lib-v0.43.0

test: the latest nanoarrow supports utf8view type (#1257)

v0.19.1

This is a maintenance relase. No user facing changes.

lib-v0.42.1

docs: fix some typos in DEVELOPMENT.md (#1211)

v0.19.0

Breaking changes

• Updated rust-polars to unreleased 2024-08-20, after 0.42.0 (#1183).
• $describe_plan() and $describe_optimized_plan() are removed. Use
  respectively $explain(optimized = FALSE) and $explain() instead (#1182).
• The parameter inherit_optimization is removed from all functions that had it
  (#1183).
• In $write_parquet() and $sink_parquet(), the parameter data_pagesize_limit
  is renamed data_page_size (#1183).
• The LazyFrame method $get_optimization_toggle() is removed, and
  $set_optimization_toggle() is renamed $optimization_toggle() (#1183).
• In $unpivot(), the parameter streamable is removed (#1183).
• Some functions have a parameter future that determines the compatibility level
  when exporting Polars' internal data structures. This parameter is renamed
  compat_level, which takes FALSE for the oldest flavor (more compatible)
  and TRUE for the newest one (less compatible). It can also take an integer
  determining a specific compatibility level when more are added in the future.
  For now, future = FALSE can be replaced by compat_level = FALSE (#1183).
• In $scan_parquet() and $read_parquet(), the default value of
  hive_partitioning is now NULL (#1189).
• In $dt$epoch(), the argument tu is renamed to time_unit (#1196).
• In $fill_nan() for DataFrame, LazyFrame and Expr, the argument is
  renamed value (#1198).
• $shift_and_fill() is removed and replaced by a new argument fill_value in
  $shift(). $shift_and_fill(fill_value, periods) can be replaced by
  $shift(n, fill_value) (#1201).
• In $shift() for various Expr, the argument periods is renamed n (#1201).
• In $clip(), arguments min and max are renamed lower_bound and
  upper_bound (#1203).
• $clip_min() and $clip_max() are removed. Use $clip() with only
  lower_bound or upper_bound instead (#1203).
• In $write_csv and $sink_csv(), the argument quote is renamed
  quote_char (#1206).

New features

• New method $str$extract_many() (#1163).
• Converting a nanoarrow_array with zero rows to an RPolarsDataFrame via
  as_polars_df() now keeps the original schema (#1177).
• $write_parquet() has two new arguments partition_by and
  partition_chunk_size_bytes to write a DataFrame to a hive-partitioned
  directory (#1183).
• New method $bin$size() (#1183).
• In $scan_parquet() and $read_parquet(), the parallel argument can take
  the new value "prefiltered" (#1183).
• $scan_parquet(), $scan_ipc() and $read_parquet() have a new argument
  include_file_paths to automatically add a column containing the path to the
  source file(s) (#1183).
• $scan_ipc() can read a hive-partitioned directory with its new arguments
  hive_partitioning, hive_schema, and try_parse_hive_dates (#1183).
• $scan_parquet() and $read_parquet() gain two new arguments for more control
  on importing hive partitions: hive_schema and try_parse_hive_dates (#1189).
• New method $gather_every() for LazyFrame and DataFrame (#1199).
• $glimpse() for DataFrame has two new arguments max_items_per_column and
  max_colname_length (#1200).
• New method $list$sample() (#1204).
• New argument coalesce in $join_asof() (#1205).
• New argument maintain_order in $list$unique() (#1207).

Other changes

• In $unnest() for DataFrame and LazyFrame, the names argument is removed
  and replaced by .... This doesn't change the previous behavior, e.g.
  df$unnest(names = c("a", "b")) still works (#1170).

---

Full Changelog: v0.18.0...v0.19.0

lib-v0.42.0

chore: bump serde_json from 1.0.125 to 1.0.127 in /src/rust (#1209)

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>