Changelog

Source: NEWS.md

mlr3db (development version)

mlr3db 0.7.0

CRAN release: 2025-10-06

• Compatibility fixes with new polars version (1.1.0).

mlr3db 0.6.0

CRAN release: 2025-07-18

• feat: New backend DataBackendPolars.

mlr3db 0.5.2

CRAN release: 2023-11-04

• Bugfix: DataBackendDuckDB calculated missing values incorrectly.
• Compatibility with future versions of dbplyr (#35).

mlr3db 0.5.1

CRAN release: 2023-10-17

• Compatibility with new duckdb version (#36).

mlr3db 0.5.0

CRAN release: 2022-08-08

• Support for parquet files as Backend via DuckDB.
• New converter as_duckdb_backend().

mlr3db 0.4.2

CRAN release: 2021-11-17

• Compatibility fixes with new duckdb version.

mlr3db 0.4.1

CRAN release: 2021-04-13

• Temporarily disabled some tests to overcome some regressions in duckdb.

mlr3db 0.4.0

CRAN release: 2021-03-09

• Added a show_query() method for DataBackendDplyr (#4).
• A reconnector is automatically added in as_data_backend() for objects of type tbl_SQLiteConnection and tbl_duckdb_connection.

mlr3db 0.3.0

CRAN release: 2020-12-16

• New backend DataBackendDuckDB.
• dplyr is now optional (moved from imports to suggests).

mlr3db 0.2.0

CRAN release: 2020-09-28

• Set a primary key for SQLite databases generated from data frames.
• Set a reconnector for SQLite databases generated from data frames.
• Resolved a warning signaled by dplyr-1.0.0.

mlr3db 0.1.5

CRAN release: 2020-02-19

• as_data_backend() method to construct a DataBackendDplyr now specialized to operate on objects of type "tbl_lazy" (was "tbl" before). This way, local "tbl" objects such as tibbles are converted to a DataBackendDataTable by mlr3::as_data_backend.data.frame().

mlr3db 0.1.4

CRAN release: 2020-02-05

• Connections can now be automatically re-connected via a user-provided function.
• DataBackendDplyr now has a finalizer which automatically disconnects the database connection during garbage collection.

mlr3db 0.1.3

CRAN release: 2019-10-29

• During construction of DataBackendDplyr, you can now select columns to be converted from string to factor. This simplifies the work with SQL databases which do not naturally support factors (or where the level information is lost in the transaction).

mlr3db 0.1.2

CRAN release: 2019-08-26

• Fixed $distinct() to not return missing values per default.
• Added na_rm argument to $distinct().
• Renamed as_sqlite() to as_sqlite_backend()

mlr3db 0.1.1

CRAN release: 2019-08-01

• Initial release.