in datafusion/sql/src/expr/value.rs [337:362]
fn has_units(val: &str) -> bool {
val.ends_with("century")
|| val.ends_with("centuries")
|| val.ends_with("decade")
|| val.ends_with("decades")
|| val.ends_with("year")
|| val.ends_with("years")
|| val.ends_with("month")
|| val.ends_with("months")
|| val.ends_with("week")
|| val.ends_with("weeks")
|| val.ends_with("day")
|| val.ends_with("days")
|| val.ends_with("hour")
|| val.ends_with("hours")
|| val.ends_with("minute")
|| val.ends_with("minutes")
|| val.ends_with("second")
|| val.ends_with("seconds")
|| val.ends_with("millisecond")
|| val.ends_with("milliseconds")
|| val.ends_with("microsecond")
|| val.ends_with("microseconds")
|| val.ends_with("nanosecond")
|| val.ends_with("nanoseconds")
}