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470d130289
<!-- if this PR closes one or more issues, you can automatically link the PR with them by using one of the [*linking keywords*](https://docs.github.com/en/issues/tracking-your-work-with-issues/linking-a-pull-request-to-an-issue#linking-a-pull-request-to-an-issue-using-a-keyword), e.g. - this PR should close #xxxx - fixes #xxxx you can also mention related issues, PRs or discussions! --> # Description This PR expands the `dtype` parameter of the `polars cast` command to include `decimal<precision, scale>` type. Setting precision to "*" will compel inferring the value. Note, however, setting scale to a non-integer value will throw an explicit error (the underlying polars crate assigns scale = 0 in such a case, but I opted for throwing an error instead). . ``` $ [[a b]; [1 2] [3 4]] | polars into-df | polars cast decimal<4,2> a | polars schema ╭───┬──────────────╮ │ a │ decimal<4,2> │ │ b │ i64 │ ╰───┴──────────────╯ $ [[a b]; [10.5 2] [3.1 4]] | polars into-df | polars cast decimal<*,2> a | polars schema ╭───┬──────────────╮ │ a │ decimal<*,2> │ │ b │ i64 │ ╰───┴──────────────╯ $ [[a b]; [10.05 2] [3.1 4]] | polars into-df | polars cast decimal<5,*> a | polars schema rror: × Invalid polars data type ╭─[entry #25:1:47] 1 │ [[a b]; [10.05 2] [3.1 4]] | polars into-df | polars cast decimal<5,*> a | polars schema · ─────┬───── · ╰── `*` is not a permitted value for scale ╰──── ``` # User-Facing Changes <!-- List of all changes that impact the user experience here. This helps us keep track of breaking changes. --> There are no breaking changes. The user has the additional option to `polars cast` to a decimal type # Tests + Formatting Tests have been added to `nu_plugin_polars/src/dataframe/values/nu_schema.rs`
Nushell core libraries and plugins
These sub-crates form both the foundation for Nu and a set of plugins which extend Nu with additional functionality.
Foundational libraries are split into two kinds of crates:
- Core crates - those crates that work together to build the Nushell language engine
- Support crates - a set of crates that support the engine with additional features like JSON support, ANSI support, and more.
Plugins are likewise also split into two types:
- Core plugins - plugins that provide part of the default experience of Nu, including access to the system properties, processes, and web-connectivity features.
- Extra plugins - these plugins run a wide range of different capabilities like working with different file types, charting, viewing binary data, and more.