Method compare_values

graphlite/src/exec/executor.rs:6752–6785

Compare two values for sorting with NULLS ordering support

(
        &self,
        a: &Value,
        b: &Value,
        nulls_first: bool,
    )

    /// Compare two values for sorting with NULLS ordering support
    fn compare_values(
        &self,
        a: &Value,
        b: &Value,
        nulls_first: bool,
    ) -> Option<std::cmp::Ordering> {
        use crate::storage::Value;
        use std::cmp::Ordering;

        match (a, b) {
            (Value::Number(a), Value::Number(b)) => {
                Some(a.partial_cmp(b).unwrap_or(Ordering::Equal))
            }
            (Value::String(a), Value::String(b)) => Some(a.cmp(b)),
            (Value::Boolean(a), Value::Boolean(b)) => Some(a.cmp(b)),
            (Value::Null, Value::Null) => Some(Ordering::Equal),
            (Value::Null, _) => Some(if nulls_first {
                Ordering::Less
            } else {
                Ordering::Greater
            }),
            (_, Value::Null) => Some(if nulls_first {
                Ordering::Greater
            } else {
                Ordering::Less
            }),
            // For different types, convert to string for comparison
            _ => {
                let a_str = format!("{:?}", a);
                let b_str = format!("{:?}", b);
                Some(a_str.cmp(&b_str))
            }
        }
    }

    /// Execute DISTINCT operation to remove duplicate rows
    fn execute_distinct(&self, input_rows: Vec<Row>) -> Result<Vec<Row>, ExecutionError> {