Method convert_to_positional_rows_aligned

graphlite/src/exec/executor.rs:7627–7652

Convert rows to positional format, mapping by position rather than by name Used for set operations where column names may differ but positions must align

(
        &self,
        rows: Vec<Row>,
        _source_variables: &[String],
        target_variables: &[String],
    )

    /// Convert rows to positional format, mapping by position rather than by name
    /// Used for set operations where column names may differ but positions must align
    fn convert_to_positional_rows_aligned(
        &self,
        rows: Vec<Row>,
        _source_variables: &[String],
        target_variables: &[String],
    ) -> Vec<Row> {
        rows.into_iter()
            .map(|row| {
                let mut positional_values = Vec::new();

                // Map values by NAME from source to target variables
                // For each target variable, find its value in the source row
                for target_var in target_variables.iter() {
                    // Look for this target variable name in the source row
                    if let Some(value) = row.values.get(target_var) {
                        positional_values.push(value.clone());
                    } else {
                        // Target variable not found in source, use NULL
                        positional_values.push(Value::Null);
                    }
                }

                Row::from_positional(positional_values, target_variables)
            })
            .collect()
    }

    /// Execute UNION operation
    fn execute_union(