Added

• Add support for the decimals data type.

  Decimals dtypes are represented by the {:decimal, precision, scale} tuple, where precision can be a positive integer from 0 to 38, and is the maximum number of digits that can be represented by the decimal. The scale is the number of digits after the decimal point.

  With this addition, we also added the :decimal package as a new dependency. The Explorer.Series.from_list/2 function accepts decimal numbers from that package as values - %Decimal{}.

  This version has a small number of operations, but is a good foundation.

• Allow the usage of queries and lazy series outside callbacks and macros. This is an improvement to functions that were originally designed to accept callbacks. With this change you can now reuse lazy series across different "queries". See the Explorer.Query docs for details.

  The affected functions are:

  • Explorer.DataFrame.filter_with/2
  • Explorer.DataFrame.mutate_with/2
  • Explorer.DataFrame.sort_with/2
  • Explorer.DataFrame.summarise_with/2

• Allow accessing the dataframe inside query.

• Add "lazy read" support for Parquet and NDJSON from HTTP(s).

• Expose more options for Explorer.Series.cut/3 and Explorer.Series.qcut/3. These options were available in Polars, but not in our APIs.

Fixed

• Fix creation of series where a nil value inside a list - for a {:list, any()} dtype - could result in an incompatible dtype. This fix will prevent panics for list of lists with nil entries.

• Fix Explorer.DataFrame.dump_ndjson/2 when date time is in use.

• Fix Explorer.Series.product/1 for lazy series.

• Accept %FSS.HTTP.Entry{} structs in functions like Explorer.DataFrame.from_parquet/2.

• Fix encode of binaries to terms from series of the {:struct, any()} dtype. In case the inner fields of the struct had any binary (:binary dtype), it was causing a panic.

Changed

• Change the defaults of the functions Explorer.Series.cut/3 and Explorer.Series.qcut/3 to not have "break points" column in the resultant dataframe. So the :include_breaks is now false by default.

Pull requests

• Fix DataFrame.filter_with spec by @mhanberg in https://github.com/elixir-explorer/explorer/pull/975
• fix typo cuontry ~> country by @audacioustux in https://github.com/elixir-explorer/explorer/pull/979
• Fix issue 976 by @billylanchantin in https://github.com/elixir-explorer/explorer/pull/980
• Fix "dump_ndjson" by activating "timezones" feature by @philss in https://github.com/elixir-explorer/explorer/pull/981
• Dependency updates - mix only by @philss in https://github.com/elixir-explorer/explorer/pull/983
• Fix typos by @preciz in https://github.com/elixir-explorer/explorer/pull/984
• Fix product for lazy series by @philss in https://github.com/elixir-explorer/explorer/pull/986
• Update Polars to v0.43.1 by @philss in https://github.com/elixir-explorer/explorer/pull/985
• Add initial support to Decimal by @philss in https://github.com/elixir-explorer/explorer/pull/987
• Add function clause for %FSS.HTTP.Entry{} by @billylanchantin in https://github.com/elixir-explorer/explorer/pull/992
• LazyFrame from http endpoint by @ceyhunkerti in https://github.com/elixir-explorer/explorer/pull/993
• Fix encode of binaries to terms inside struct series by @philss in https://github.com/elixir-explorer/explorer/pull/996
• Update dependencies by @philss in https://github.com/elixir-explorer/explorer/pull/997
• Add read support for lazy http ndjson by @ceyhunkerti in https://github.com/elixir-explorer/explorer/pull/998
• De-functionalize query internals by @billylanchantin in https://github.com/elixir-explorer/explorer/pull/989
• Fix return type in DataFrame.dtypes/1 typespec (#1002) by @mooreryan in https://github.com/elixir-explorer/explorer/pull/1003
• Add support for some operations with decimals by @philss in https://github.com/elixir-explorer/explorer/pull/988
• Expose options to Series' cut and qcut by @philss in https://github.com/elixir-explorer/explorer/pull/1007
• Fix cut/3 and qcut/3 when :include_breaks is false by @philss in https://github.com/elixir-explorer/explorer/pull/1009
• Release v0.10.0 by @philss in https://github.com/elixir-explorer/explorer/pull/1008

New Contributors

• @audacioustux made their first contribution in https://github.com/elixir-explorer/explorer/pull/979
• @preciz made their first contribution in https://github.com/elixir-explorer/explorer/pull/984
• @ceyhunkerti made their first contribution in https://github.com/elixir-explorer/explorer/pull/993
• @mooreryan made their first contribution in https://github.com/elixir-explorer/explorer/pull/1003

Full Changelog: https://github.com/elixir-explorer/explorer/compare/v0.9.2...v0.10.0

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