CHANGELOG.md

0.15.1 (unreleased)

• Added experimental support for Delta Lake
• Added by_name selector
• Added thread_pool_size method to Polars

0.15.0 (2024-11-20)

• Updated Polars to 0.44.2
• I/O methods no longer require a URI object for remote files
• Added support for scanning files from cloud storage
• Added experimental support for Arrow C streams
• Added selectors
• Added config, string_cache, and cs methods to Polars
• Added strict option to DataFrame constructor
• Added compat_level option to write_ipc and write_ipc_stream methods
• Added name option to write_avro method
• Added support for array of name-type pairs to schema option
• Added cast method to DataFrame and LazyFrame
• Added coalesce option to join and join_asof methods
• Added validate option to join method
• Added strict option to rename method
• Changed rechunk option default from true to false for scan_parquet method
• Fixed limit method for LazyFrame
• Fixed read_database connection leasing for Active Record 7.2
• Removed get_dummies method from Polars (use df.to_dummies instead)
• Removed to_list method from Polars (use col(name).list instead)
• Removed spearman_rank_corr method from Polars (use corr(method: "spearman") instead)
• Removed pearson_corr method from Polars (use corr(method: "pearson") instead)
• Removed inner_dtype and time_unit methods from Series

0.14.0 (2024-09-17)

• Updated Polars to 0.43.1
• Fixed frac option for sample method

0.13.0 (2024-09-04)

• Updated Polars to 0.42.0
• Added precompiled gem for Linux ARM MUSL
• Added precompiled gem for Windows

0.12.0 (2024-07-11)

• Updated Polars to 0.41.3
• Added nth method to Polars
• Added get method to Expr
• Added check_names option to equals method
• Improved struct method
• Aliased melt to unpivot for DataFrame and LazyFrame
• Changed signature of pivot and melt methods
• Changed signature of date_range and date_ranges methods
• Changed set_sorted method to only accept a single column
• Removed use_earliest option from replace_time_zone and to_datetime methods (use ambiguous instead)
• Removed by and closed options from rolling_* methods (use rolling_*_by instead)
• Removed explode method from StringExpr (use split("").explode instead)
• Removed set_ordering method from CatExpr

0.11.0 (2024-06-02)

• Updated Polars to 0.40.0
• Added date_ranges method to Polars
• Added read_ipc_stream method to Polars
• Added write_ipc_stream to DataFrame
• Added flags method to DataFrame
• Added support for keyword arguments to agg methods
• Aliased apply to map_rows for DataFrame
• Changed default name for with_row_index from row_nr to index

0.10.0 (2024-05-02)

• Updated Polars to 0.39.2
• Added support for writing JSON to string
• Added support for writing Parquet to StringIO
• Added support for cross joins
• Added data_page_size option to write_parquet method
• Added truncate_ragged_lines option to read_csv, read_csv_batched, and scan_csv methods
• Added precompiled gem for Linux x86-64 MUSL
• Changed drop method to ignore missing columns
• Fixed error with then method

0.9.0 (2024-03-03)

See the upgrade guide

• Updated Polars to 0.38.1
• Changed count method to exclude null values
• Changed dtype and schema methods to always return instances of data types
• Added Enum type
• Added Testing module
• Added arctan2, arctan2d, set_random_seed, and sql_expr methods to Polars
• Added enable_string_cache, disable_string_cache, and using_string_cache to Polars
• Added methods for horizontal aggregations to Polars
• Added sink_ipc, sink_csv, and sink_ndjson methods to LazyFrame
• Added replace method to Series and Expr
• Added eq, eq_missing, ne, and ne_missing methods to Series and Expr
• Added ge, gt, le, and lt methods to Series and Expr
• Added merge_sorted method to DataFrame and LazyFrame
• Added more methods to ArrayExpr and ArrayNameSpace
• Added more methods to CatExpr and CatNameSpace
• Added more methods to ListExpr and ListNameSpace
• Added more methods to MetaExpr
• Added more methods to StringExpr
• Added schema_overrides option to read_database method
• Added join_nulls option to join method
• Added ignore_nulls option to any and all methods
• Aliased apply to map_elements for Series
• Aliased cleared to clear for DataFrame and LazyFrame
• Fixed error with BigDecimal objects

0.8.0 (2024-01-10)

• Updated Polars to 0.36.2
• Added support for Ruby 3.3
• Added warning to count method for Series and Expr about excluding null values in 0.9.0
• Added cut and qcut methods to Series and Expr
• Added rle and rle_id methods to Series and Expr
• Added bottom_k method to Series
• Aliased Utf8 data type to String
• Fixed error with top_k method
• Dropped support for Ruby < 3.1

0.7.0 (2023-11-17)

• Updated Polars to 0.35.2
• Added support for SQL querying
• Added ! for Expr
• Added Config module
• Added none? method to Series
• Aliased groupby to group for DataFrame and LazyFrame
• Changed series creation with all nil objects to Null type
• Removed tz_localize method from DateTimeExpr
• Removed support for passing Active Record objects to DataFrame.new (use read_database instead)

0.6.0 (2023-07-23)

• Updated Polars to 0.31.1
• Added Array type
• Added support for creating series with Datetime type
• Added support for Null to to_a method
• Improved support for Decimal and Time types
• Changed arr to list for Series and Expr
• Changed series creation with BigDecimal objects to Decimal type
• Changed series creation with ActiveSupport::TimeWithZone objects to Datetime type
• Changed equality for data types
• Fixed error with groupby_dynamic method
• Removed agg_list method from GroupBy

0.5.0 (2023-05-15)

• Updated Polars to 0.29.0
• Added support for List and Struct to to_a method
• Added support for creating series from Numo arrays
• Added column assignment to DataFrame
• Added sort! and to_a methods to DataFrame
• Added support for Object to to_a method
• Aliased len to size for Series and DataFrame
• Aliased apply to map and unique to uniq for Series
• Improved any and all for Series

0.4.0 (2023-04-01)

• Updated Polars to 0.28.0
• Added support for creating Binary series
• Added support for Binary to to_a method
• Added support for glob patterns to read_parquet method
• Added sink_parquet method to LazyFrame
• Added BinaryExpr and BinaryNameSpace
• Prefer read_database over read_sql

0.3.1 (2023-02-21)

• Added plot method to DataFrame and GroupBy
• Added to_numo method to Series and DataFrame
• Added support for Datetime to to_a method
• Fixed is_datelike method for Datetime and Duration

0.3.0 (2023-02-15)

• Updated Polars to 0.27.1
• Added each method to Series, DataFrame, and GroupBy
• Added iter_rows method to DataFrame
• Added named option to row and rows methods
• Replaced include_bounds option with closed for is_between method

0.2.5 (2023-02-01)

• Added support for glob patterns to read_csv method
• Added support for symbols to more methods

0.2.4 (2023-01-29)

• Added support for more types when creating a data frame from an array of hashes

0.2.3 (2023-01-22)

• Fixed error with precompiled gem on Mac ARM
• Fixed issue with structs

0.2.2 (2023-01-20)

• Added support for strings to read_sql method
• Improved indexing
• Fixed error with precompiled gem on Mac ARM

0.2.1 (2023-01-18)

• Added read_sql method
• Added to_csv method
• Added support for symbol keys

0.2.0 (2023-01-14)

• Updated Polars to 0.26.1
• Added precompiled gems for Linux and Mac
• Added data type classes
• Changed dtype and schema methods to return data type class instead of symbol
• Dropped support for Ruby < 3

0.1.5 (2022-12-22)

• Added read_avro and write_avro methods
• Added more methods

0.1.4 (2022-12-02)

• Added more methods
• Improved performance

0.1.3 (2022-11-27)

• Added more methods

0.1.2 (2022-11-25)

• Added more methods

0.1.1 (2022-11-23)

• Added more methods

0.1.0 (2022-11-21)

• First release