v0.11.1

What's Changed

• Bump to version 0.11.1-dev by @billylanchantin in #1101
• Fix printing lazy data frame with default print options by @mhanberg in #1104
• Add dump arrow schema and batchrecord by @WolfDan in #1103
• test: remove print from dataframe test by @mhanberg in #1106
• feat: cumulative_count by @mhanberg in #1107
• Add 'stable' flag to group_by operation by @petrkozorezov in #1102
• fix issue with DF.frequencies stable flag default value by @petrkozorezov in #1110
• docs: fix mutate docs formatting by @mhanberg in #1108

New Contributors

• @WolfDan made their first contribution in #1103

Full Changelog: v0.11.0...v0.11.1

SHA256 of artifacts

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v0.11.0

What's Changed

• Make region truly optional by @szajbus in #1030
• Add method to estimate DataFrame memory use by @thbar in #1034
• Add Regex as a valid column type in typespec by @viniciussbs in #1037
• added error message text to exploring_explorer.livemd by @pejrich in #1040
• Fix typespecs for series that may return lazy series by @philss in #1041
• Update Polars to v0.44 by @philss in #1031
• Update Polars to v0.45 by @philss in #1044
• Add radian/degree conversion functions by @sasikumar87 in #1046
• Update Rustler to v0.35 by @philss in #1048
• Add Elixir 1.18 to the CI workflow by @philss in #1050
• Add quote_style option to csv IO functions by @jdbarillas in #1049
• Fix trigonometric functions to not raise on f32 inputs by @sasikumar87 in #1051
• Update Rust and Elixir deps by @philss in #1052
• Fix ungroup spec by @billylanchantin in #1056
• Better concat_rows error messages by @billylanchantin in #1057
• Raise on out of bounds range access by @billylanchantin in #1061
• Document/test unstable decimal dtype by @billylanchantin in #1033
• docs: show default :limit for DataFrame.print/1 by @mhanberg in #1062
• Use … to incidate there are hidden rows by @billylanchantin in #1064
• Update Rustler to v0.36 by @philss in #1059
• Add DF.to_table_string/2 by @billylanchantin in #1065
• Fix warning from :table_rex by @billylanchantin in #1067
• chore: update flake.nix by @mhanberg in #1069
• docs: fix formatting of mutate_with options by @mhanberg in #1072
• Implement fill_missing for all integer dtypes by @billylanchantin in #1078
• Implement fill_missing for all float types by @billylanchantin in #1086
• Enable Series.frequencies over {:list, _} type by @petrkozorezov in #1083
• Remove dbg! from #1086 by @billylanchantin in #1087
• refactor: remove unused enum by @mhanberg in #1090
• chore(flake): update flake by @mhanberg in #1089
• fix: update polars to v0.49.x by @mhanberg in #1091
• ci: update ubuntu and windows in precompilation matrix by @mhanberg in #1097
• Change complixity of Series.categorise from O(m*n) to O(m+n) by @petrkozorezov in #1099
• Prep for release 0.11.0 by @billylanchantin in #1100

New Contributors

• @szajbus made their first contribution in #1030
• @viniciussbs made their first contribution in #1037
• @pejrich made their first contribution in #1040
• @jdbarillas made their first contribution in #1049
• @petrkozorezov made their first contribution in #1083

Full Changelog: v0.10.1...v0.11.0

SHA256 of the artifacts

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v0.10.1

Fixed

• Fix creation of series of {:list, {:decimal, ...}} containing empty lists.

• Use i128 for :coef field in the Rust code.

  This field is a positive, arbitrary precision integer on the Elixir side.
  It's convenient to represent it as a signed i128 because that's what the Decimal dtype expects. While you could technically create an ExDecimal struct with a negative coef, it's not a practical concern.

• Fix Explorer.DataFrame.print/1 for empty dataframes.

• Fix datetime encoding overflow.

  Before we were always converting first to a microsecond-based representation then to the final representation. The intermediate conversion is unnecessary and risks overflows when trying to convert to a different time unit later.
  This approach converts directly to i64 from the Elixir struct and time unit.

• Encode millisecond precision for time and datetime series.

• Fix list struct print bug.

  Fixes an issue where we can't print columns with a dtype like {:list, {:struct, ...}} where the root of the tree isn't a :struct but it contains a :struct.

Deprecated

• Remove documentation for deprecated functions to_date/1 and to_time/1.
  They are functions from the Explorer.Series that soon will be removed.

Pull requests

• Add access example to DataFrame docs (#1001) by @mooreryan in #1004
• Implement Property Tests for DataFrame.new by @maennchen in #1012
• Fix decimal empty list bug by @billylanchantin in #1015
• Use coef: i128 in decimal by @billylanchantin in #1017
• Print empty DataFrame by @billylanchantin in #1019
• Allow [] in DF.filter_with/2 by @billylanchantin in #1022
• Fix datetime encoding overflow by @billylanchantin in #1020
• Encode millisecond precision by @billylanchantin in #1024
• Fix list struct print bug by @billylanchantin in #1027
• Unskip DataFrame serialization properties by @billylanchantin in #1028
• Prepare for release of v0.10.1 by @philss in #1029

Full Changelog: v0.10.0...v0.10.1

SHA256 of the artifacts

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v0.10.0

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

New Contributors

• @audacioustux made their first contribution in #979
• @preciz made their first contribution in #984
• @ceyhunkerti made their first contribution in #993
• @mooreryan made their first contribution in #1003

Full Changelog: v0.9.2...v0.10.0

SHA256 of the artifacts

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v0.9.2

Added

• Add a new :keep option to the mutate_with/3 function and mutate/3 macro.
  This option allows users to control which columns are retained in the output
  dataframe after a mutation operation. You can use :all (the default) or :none.

Fixed

• Fix handling of "LazySeries" with remote dataframes.
• Fix typespecs of Explorer.Series.cast/2 by adding a dtype_alias() type.
• Stop converting io_dtypes() to maps in order to preserve names ordering.

Pull requests

• Add keep: :none argument to mutate functions by @brendon9x in #966
• Release v0.9.2 by @philss in #973

New Contributors

• @brendon9x made their first contribution in #966

Full Changelog: v0.9.1...v0.9.2

SHA256 of artifacts

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Build with attestations: https://github.com/elixir-explorer/explorer/actions/runs/10579468339

v0.9.1

Added

• Add support for saving to the cloud using streaming and the IPC format.
  This will enable saving a lazy frame to the cloud without loading it
  entirely in memory. It only supports saves to S3-compatible storage services.

Changed

• Force garbage collection on remote gc.

Fixed

• Re-enable support for saving to the cloud using streaming and the Parquet format.
  It's a fix from the release of v0.9.0 that disabled this feature.

• Fix overwrite of dtypes for Explorer.DataFrame.load_csv/2.
  This was a regression introduced in v0.9.0.

Pull requests

• Include changelog link by @bryannaegele in #954
• Fix overwrite of dtypes for DF.load_csv/2 by @philss in #955
• Update exploring_explorer.livemd by @balexand in #957
• Update mix dependencies by @philss in #960
• Update Polars to v0.42 and enable to_parquet/ipc cloud by @philss in #961
• Release v0.9.1 by @philss in #962

New Contributors

• @bryannaegele made their first contribution in #954
• @balexand made their first contribution in #957

Full Changelog: v0.9.0...v0.9.1

SHA256 of artifacts

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v0.9.0

Added

• Add initial support for SQL queries.

  The Explorer.DataFrame.sql/3 is a function that accepts a dataframe and a SQL query. The SQL is not validated by Explorer, so the queries will be backend dependent. Right now we have only Polars as the backend.

• Add support for remote series and dataframes.

  Automatically transfer data between nodes for remote series and dataframes and perform distributed garbage collection.

  The functions in Explorer.DataFrame and Explorer.Series will automatically move operations on remote dataframes to the nodes they belong to.
  The Explorer.Remote module provides additional conveniences for manual placement.

• Add FLAME integration, so we automatically track remote series and dataframes returned from FLAME calls when the :track_resources option is enabled.
  See FLAME for more.

• Add Explorer.DataFrame.transform/3 that applies an Elixir function to each row. This function is similar to Explorer.Series.transform/2, and as such, it's considered an expensive operation. So it's recommended only if there is no similar dataframe or series operation available.

• Improve performance of Explorer.Series.from_list/2 for most of the cases where the :dtype option is given. This is specially true for when the dtype is :binary.

Changed

• Stop inference of dtypes if the :dtype option is given by the user.
  The main goal of this change is to improve performance. We are now delegating the job of decoding the terms as the given :dtype to the backend.

• Explorer.Series.pow/2 no longer casts to float when the exponent is a signed integer. We are following the way Polars works now, which is to try to execute the operation or raise an exception in case the exponent is negative.

• Explorer.Series.pivot_wider/4 no longer includes the names_from column name in the new columns when values_from is a list of columns. This is more consistent with its behaviour when values_from is a single column.

• Explorer.Series.substring/3 no longer cycles to the end of the string if the negative offset surpasses the beginning of that string. In that case, an empty string is returned.

• The Explorer.Series.ewm_* functions no longer replace nil values with the value at the previous index. They now propogate nil values through to the result series.

• Saving a dataframe as a Parquet file to S3 services no longer works when streaming is enabled. This is temporary due to a bug in Polars. An exception should be raised instead.

Pull requests

• Update workflows to remove warnings by @philss in #925
• Add Artifact Attestations by @philss in #926
• Stop inference of type if dtype is given and manually decode terms where needed by @philss in #928
• Improve "from_list/2" decoding of terms for binary series by @philss in #929
• Initial SQL support by @billylanchantin in #918
• Remote series and dataframes and distributed GC by @josevalim in #932
• Add datetime literals to expressions by @billylanchantin in #935
• Fix DateTime -> ExDateTime lifetime issue by @elbow-jason in #909
• Improve performance of "concat_columns" by @philss in #938
• Add DF.transform by @billylanchantin in #912
• Implement message-on-gc NIFs in Rust by @filmor in #936
• Docs: replace bad link for nsjson by @zhzy0077 in #940
• Update Rust toolchain to nightly-2024-06-23 by @philss in #942
• Update MacOS version in the precompilation GH workflow by @philss in #943
• Improve the docs for from_query/4 by @cigrainger in #946
• Bump Polars to v0.41.3 by @lkarthee in #917
• Add FLAME integration by @josevalim in #945
• Add changes for v0.9 by @philss in #950
• Release v0.9 by @philss in #951

New Contributors

• @elbow-jason made their first contribution in #909
• @zhzy0077 made their first contribution in #940

Full Changelog: v0.8.3...v0.9.0

SHA256 of artifacts

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v0.8.3

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.

Pull requests

• Fix typo in Explorer.Query doc by @mhanberg in #904
• Initial timezone support by @billylanchantin in #903
• add rechunk option to from_parquet by @mlineen in #915
• Fix concat_rows with not aligned dataframes by @philss in #920
• Let {:datetime, _} be an alias for {:naive_datetime, _} for backwards compatibility by @billylanchantin in #924
• Prepare release of v0.8.3 by @philss in #921

New Contributors

• @mhanberg made their first contribution in #904

SHA256 of the artifacts

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Full Changelog: v0.8.2...v0.8.3

v0.8.2

Added

• Add functions to work with strings and regexes.

  Some of the functions have the prefix "re_", because they accept a string that represents a regular expression.

  There is an important detail: we do not accept Elixir regexes, because we cannot guarantee that the backend supports it. Instead we accept a plain string that is "escaped". This means that you can use the ~S sigil to build that string.
  Example: ~S/(a|b)/.

  The added functions are the following:

  • Explorer.Series.split_into/3 - split a string series into a struct of string fields. This function accepts a string as a separator.

  • Explorer.Series.re_contains/2 - check is the string series matches the regex pattern. Like the "non regex" counterpart, it returns a boolean series.

  • Explorer.Series.re_replace/3 - replaces all occurences of a pattern with replacement in string series. The replacement can refer to groups captures by using the ${x}, where x is the group index (starts with 1) or name.

  • Explorer.Series.count_matches/2 - count how many times a substring appears in a string series.

  • Explorer.Series.re_count_matches/2 - count how many times a pattern matches in a string series.

  • Explorer.Series.re_scan/2 - scan for all matches for the given regex pattern.
    This is going to result in a series of lists of strings - {:list, :string}.

  • Explorer.Series.re_named_captures/2 - extract all capture groups as a struct for the given regex pattern. In case the groups are not named, their positions are used as names.

• Enable the usage of system certificates if OTP version 25 or above.

• Add support for the :streaming option in Explorer.DataFrame.to_csv/3.

• Support operations with groups in the Lazy Polars backend. This change makes the lazy frame implementation more useful, by supporting the usage of groups in following functions:

  • Explorer.DataFrame.slice/3

  • Explorer.DataFrame.head/2

  • Explorer.DataFrame.tail/2

  • Explorer.DataFrame.filter_with/2 and the macro version of it, filter/2.

  • Explorer.DataFrame.sort_with/3, although it ignores "maintain order" and "nulls last" options when used with groups.

  • Explorer.DataFrame.mutate_with/2 and its macro version, mutate/2.

Changed

• We now avoid raising an exception if a non existent column is used in Explorer.DataFrame.discard/2.

• Make the dependency of cacerts optional. This is because people using Erlang/OTP 25 or above can use the certificates provided by the system.
  So you may need to add the dependency of cacerts if your OTP version is older than that.

• Some precision differences in float operations may appear. This is due to an update in the Polars version to "v0.38.1". Polars is our default backend.

Fixed

• Fix Explorer.Series.split/2 inside the context of Explorer.Query.

• Add optional X-Amz-Security-Token header to S3 request. This is needed in case the user is passing down a token for authentication.

• Fix Explorer.DataFrame.sort_by/3 with groups to respect :nils option.
  This is considering only the eager implementation.

• Fix inspection of lazy frames in remote nodes.

Pull requests

• Bump Polars 0.37 by @lkarthee in #861
• DataFrame.discard/2 - don't raise for non existent column by @lkarthee in #872
• Add native expression for Series.split/2 by @H12 in #875
• Bump mio from 0.8.10 to 0.8.11 in /native/explorer by @dependabot in #876
• Implements Series.split_into/3 by @ryancurtin in #873
• Update Polars to v0.38 by @philss in #879
• Add optional x-amz-security-token header to S3 request by @jschniper in #881
• Rewrite LazyFrame by @philss in #882
• Update Rustler to v0.32.1 by @philss in #884
• Fix DF.sort_by/3 with groups to respect :nils option by @philss in #886
• Update Polars to v0.38.3 by @philss in #887
• Implements :streaming option for DataFrame.to_csv/3 by @ryancurtin in #889
• Support operations with groups in the Lazy Polars backend by @philss in #890
• Bump h2 from 0.3.25 to 0.3.26 in /native/explorer by @dependabot in #891
• Revert LazyFrame implementation with stack by @philss in #892
• Refactor eager DF implementation to make use of lazy backend by @philss in #893
• Add re_contains/2 and re_replace/3 to match with a regex by @philss in #894
• Add count_matches/2, re_count_matches/2, re_scan/2 and re_named_captures/2 to Series by @philss in #895
• Add changes to the change log for the upcoming version by @philss in #897
• Update dependencies by @philss in #899
• Pass down backend to lazy series and enable re_named_captures/2 usage by @philss in #896
• Release v0.8.2 by @philss in #900

New Contributors

• @H12 made their first contribution in #875
• @ryancurtin made their first contribution in #873
• @jschniper made their first contribution in #881

SHA 256 of Artifacts

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Full Changelog: v0.8.1...v0.8.2

v0.8.1

Added

• Add Explorer.Series.field/2 to extract a field from a struct series.
  It returns a new series with the field's dtype.

• Add Explorer.Series.json_decode/2 that can decode a string series containing valid JSON objects according to dtype.

• Add eager count/1 and lazy size/1 to Explorer.Series.

• Add support for maps as expressions inside Explorer.Query. They are "converted" to structs.

• Add json_path_match/2 to extract a string series from a string containing valid JSON objects.
  See the article JSONPath - XPath for JSON for details about JSON paths.

• Add Explorer.Series.row_index/1 to retrieve the index of rows starting from 0.

• Add support for passing the :on column directly (instead of inside a list) in Explorer.DataFrame.join/3.

Changed

• Remove some deprecated functions from documentation.

• Change internal representation of the :struct dtype to use list of tuples instead of a map to represent the dtypes of each field. This shouldn't break because we normalise maps to lists when a struct dtype is passed in from_list/2 or cast/2.

• Update Rustler minimum version to ~> 0.31. Since Rustler is optional, this shouldn't affect most of the users.

Fixed

• Fix float overflow error to avoid crashing the VM, and instead it returns an argument error.

• Fix Explorer.DataFrame.print/2 for when the DF contains structs.

Pull requests

• Fix typo by @ahamez in #836
• Fix for Float Overflow resulting in VM Crash by @lkarthee in #837
• add field/2 for extracting field from struct by @lkarthee in #839
• fix DF.print for :struct by @lkarthee in #840
• Add Struct json_decode/3 for decoding json from string by @lkarthee in #841
• Add eager Series.count/1 and lazy Series.size/1 by @billylanchantin in #844
• remove deprecated funcs from docs by @lkarthee in #845
• Accommodate VSCode users with the rust-analyzer extension by @billylanchantin in #846
• Fix from_list/2 of list of structs when first is empty by @philss in #849
• Change inner dtypes of structs to tuple lists by @philss in #851
• allow nils along with struct - from_list/2 by @lkarthee in #854
• add support for map as expression by @lkarthee in #855
• Inferred dtype property tests by @billylanchantin in #856
• Check duplicate keys dataframe rename column by @pcapel in #850
• add json_path_match/2 by @lkarthee in #859
• Update Rustler and use new float term type by @filmor in #860
• Series.row_index/1 by @iurimateus in #862
• Wrap join on with list by @pcapel in #866
• Support atom names in Series.field/2 by @philss in #868
• Release v0.8.1 by @philss in #869

New Contributors

• @ahamez made their first contribution in #836
• @pcapel made their first contribution in #850
• @filmor made their first contribution in #860
• @iurimateus made their first contribution in #862

Full Changelog: v0.8.0...v0.8.1
Official Changelog: https://hexdocs.pm/explorer/changelog.html

SHA256 of precompiled artifacts

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