Function to_upper

datafusion/functions/src/string/common.rs:332–334

(args: &[ColumnarValue], name: &str)

}

pub(crate) fn to_upper(args: &[ColumnarValue], name: &str) -> Result<ColumnarValue> {
    case_conversion(args, false, name)
}

#[inline]
fn unicode_case(s: &str, lower: bool) -> String {