Prepare release of v0.8.3 (#921)

* Add changes for v0.8.3

* Change version to v0.8.3

* Apply suggestions from code review

Co-authored-by: Billy Lanchantin <william.lanchantin@cargosense.com>

* Apply suggestions from code review

* One last item

---------

Co-authored-by: Billy Lanchantin <william.lanchantin@cargosense.com>

Author: Philip Sampaio

CHANGELOG.md

@@ -7,6 +7,33 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [v0.8.3] - 2024-06-10
+
+### Added
+
+- Add new data type for datetimes with timezones: `{:datetime, precision, time_zone}`
+  The old dtype is now `{:naive_datetime, precision}`.
+
+- Add option to rechunk the dataframes when using `Explorer.DataFrame.from_parquet/3`
+
+### Changed
+
+- Change the `{:datetime, precision}` dtype to `{:naive_datetime, precision}`.
+  The idea is to mirror Elixir's datetime, and introduce support for time zones.
+  Please note: `{:datetime, precision}` will work as an alias for `{:naive_datetime, precision}` for now but will raise a warning.
+  The alias will be removed in a future release.
+
+- Literal `%NaiveDateTime{}` structs used in expressions will now have `:microsecond` precision.
+  Previously they defaulted to `:nanosecond` precision.
+  This was incorrect because `%NaiveDateTime{}` structs only have `:microsecond` precision.
+
+### Fixed
+
+- Fix regression in `Explorer.DataFrame.concat_rows/2`.
+  It's possible to concat dataframes that are not aligned again.
+
+- Fix "is_finite" and "is_infinite" from `Series` to work in the context of a `Explorer.Query`.
+
 ## [v0.8.2] - 2024-04-22
 
 ### Added
@@ -985,7 +1012,8 @@ properly compare floats.
 
 First release.
 
-[Unreleased]: https://github.com/elixir-explorer/explorer/compare/v0.8.2...HEAD
+[Unreleased]: https://github.com/elixir-explorer/explorer/compare/v0.8.3...HEAD
+[v0.8.3]: https://github.com/elixir-explorer/explorer/compare/v0.8.2...v0.8.3
 [v0.8.2]: https://github.com/elixir-explorer/explorer/compare/v0.8.1...v0.8.2
 [v0.8.1]: https://github.com/elixir-explorer/explorer/compare/v0.8.0...v0.8.1
 [v0.8.0]: https://github.com/elixir-explorer/explorer/compare/v0.7.2...v0.8.0

lib/explorer/polars_backend/series.ex

@@ -38,7 +38,7 @@ defmodule Explorer.PolarsBackend.Series do
   def to_iovec(series), do: Shared.apply_series(series, :s_to_iovec)
 
   @impl true
-  def cast(%Series{dtype: :string} = series, {:datetime, precision}),
+  def cast(%Series{dtype: :string} = series, {:naive_datetime, precision}),
     do: Shared.apply_series(series, :s_strptime, [nil, precision])
 
   def cast(series, dtype),

mix.exs

@@ -2,7 +2,7 @@ defmodule Explorer.MixProject do
   use Mix.Project
 
   @source_url "https://github.com/elixir-nx/explorer"
-  @version "0.8.3-dev"
+  @version "0.8.3"
   @dev? String.ends_with?(@version, "-dev")
   @force_build? System.get_env("EXPLORER_BUILD") in ["1", "true"]