Function array_prepend_inner

datafusion/functions-nested/src/concat.rs:464–472

(args: &[ArrayRef])

}

fn array_prepend_inner(args: &[ArrayRef]) -> Result<ArrayRef> {
    let [values, array] = take_function_args("array_prepend", args)?;
    match array.data_type() {
        DataType::Null => make_array_inner(&[Arc::clone(values)]),
        DataType::List(_) => general_append_and_prepend::<i32>(args, false),
        DataType::LargeList(_) => general_append_and_prepend::<i64>(args, false),
        arg_type => exec_err!("array_prepend does not support type {arg_type}"),
    }
}

fn general_append_and_prepend<O: OffsetSizeTrait>(
    args: &[ArrayRef],