datafusion-functions-window 42.0.0

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//   http://www.apache.org/licenses/LICENSE-2.0
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//! Window Function packages for [DataFusion].
//!
//! This crate contains a collection of various window function packages for DataFusion,
//! implemented using the extension API.
//!
//! [DataFusion]: https://crates.io/crates/datafusion
//!
use std::sync::Arc;

use log::debug;

use datafusion_expr::registry::FunctionRegistry;
use datafusion_expr::WindowUDF;

pub mod row_number;

/// Fluent-style API for creating `Expr`s
pub mod expr_fn {
    pub use super::row_number::row_number;
}

/// Returns all default window functions
pub fn all_default_window_functions() -> Vec<Arc<WindowUDF>> {
    vec![row_number::row_number_udwf()]
}
/// Registers all enabled packages with a [`FunctionRegistry`]
pub fn register_all(
    registry: &mut dyn FunctionRegistry,
) -> datafusion_common::Result<()> {
    let functions: Vec<Arc<WindowUDF>> = all_default_window_functions();

    functions.into_iter().try_for_each(|fun| {
        let existing_udwf = registry.register_udwf(fun)?;
        if let Some(existing_udwf) = existing_udwf {
            debug!("Overwrite existing UDWF: {}", existing_udwf.name());
        }
        Ok(()) as datafusion_common::Result<()>
    })?;

    Ok(())
}