Function window_function_signatures

crates/gitql-std/src/window.rs:27–67

()

}

pub fn window_function_signatures() -> HashMap<&'static str, Signature> {
    let mut map: HashMap<&'static str, Signature> = HashMap::new();
    map.insert(
        "first_value",
        Signature {
            parameters: vec![Box::new(AnyType)],
            return_type: Box::new(DynamicType {
                function: first_element_type,
            }),
        },
    );

    map.insert(
        "nth_value",
        Signature {
            parameters: vec![Box::new(AnyType), Box::new(IntType)],
            return_type: Box::new(DynamicType {
                function: first_element_type,
            }),
        },
    );

    map.insert(
        "last_value",
        Signature {
            parameters: vec![Box::new(AnyType)],
            return_type: Box::new(DynamicType {
                function: first_element_type,
            }),
        },
    );

    map.insert(
        "row_number",
        Signature {
            parameters: vec![],
            return_type: Box::new(IntType),
        },
    );
    map
}

pub fn window_first_value(frame: &[Vec<Box<dyn Value>>]) -> Vec<Box<dyn Value>> {
    let frame_len = frame.len();