hex explorer 0.7.0
v0.7.0
on Hex

latest releases: 0.9.2, 0.9.1, 0.9.0...
12 months ago

Added

  • Enable reads and writes of dataframes from/to external file systems.

    It supports HTTP(s) URLs or AWS S3 locations.

    This feature introduces the FSS abstraction,
    which is also going to be present in newer versions of Kino. This is going to make the integration
    of Livebook files with Explorer much easier.

    The implementation is done differently, depending on which file format is used, and if
    it's a read or write. All the writes to AWS S3 are done in the Rust side - using an abstraction
    called CloudWriter -, and most of the readers are implemented in Elixir, by doing a download
    of the files, and then loading the dataframe from it. The only exception is the reads of
    parquet files, which are done in Rust, using Polars' scan_parquet with streaming.

    We want to give a special thanks to Qqwy / Marten for the
    CloudWriter implementation!

  • Add ADBC: Arrow Database Connectivity.

    Continuing with improvements in the IO area, we added support for reading dataframes from
    databases using ADBC, which is similar in idea to ODBC, but integrates much better with
    Apache Arrow, that is the backbone of Polars - our backend today.

    The function Explorer.DataFrame.from_query/1 is the entrypoint for this feature, and it
    allows quering databases like PostgreSQL, SQLite and Snowflake.

    Check the Elixir ADBC bindings docs for more information.

    For the this feature, we had a fundamental contribution from Cocoa
    in the ADBC bindings, so we want to say a special thanks to her!

    We want to thank the people that joined José in his live streamings on Twitch,
    and helped to build this feature!

  • Add the following functions to Explorer.Series:

  • Add duration dtypes. This is adds the following dtypes:

    • {:duration, :nanosecond}
    • {:duration, :microsecond}
    • {:duration, :millisecond}

    This feature was a great contribution from Billy Lanchantin,
    and we want to thank him for this!

Changed

  • Return exception structs instead of strings for all IO operation errors, and for anything
    that returns an error from the NIF integration.

    This change makes easier to define which type of error we want to raise.

  • Update Polars to v0.32.

    With that we made some minor API changes, like changing some options for cut/qcut operations
    in the Explorer.Series module.

  • Use nil_values instead of null_character for IO operations.

  • Never expect nil for CSV IO dtypes.

  • Rename Explorer.DataFrame.table/2 to Explorer.DataFrame.print/2.

  • Change :datetime dtype to be {:datetime, time_unit}, where time unit can be
    the following:

    • :millisecond
    • :microsecond
    • :nanosecond

  • Rename the following Series functions:

    • trim/1 to strip/2
    • trim_leading/1 to lstrip/2
    • trim_trailing/1 to rstrip/2

    These functions now support a string argument.

Fixed

  • Fix warnings for the upcoming Elixir v1.16.

  • Fix Explorer.Series.abs/1 type specs.

  • Allow comparison of strings with categories.

  • Fix Explorer.Series.is_nan/1 inside the context of Explorer.Query.
    The NIF function was not being exported.

Pull requests

New Contributors

Full Diff: v0.6.1...v0.7.0
Changelog: https://github.com/elixir-explorer/explorer/blob/main/CHANGELOG.md

SHA256 checksums

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