Method execute_having

graphlite/src/exec/executor.rs:4031–4042

Execute a HAVING clause filter For now, use the same logic as regular filter but with better error handling

(
        &self,
        condition: &Expression,
        input_rows: Vec<Row>,
        context: &mut ExecutionContext,
    )

    /// Execute a HAVING clause filter
    /// For now, use the same logic as regular filter but with better error handling
    fn execute_having(
        &self,
        condition: &Expression,
        input_rows: Vec<Row>,
        context: &mut ExecutionContext,
    ) -> Result<Vec<Row>, ExecutionError> {
        // The key insight: HAVING should work on aggregated results
        // The issue is that count(*) tries to find a "*" variable, but in HAVING context
        // we should return 1 for count(*) since we're dealing with single aggregated rows

        self.execute_filter_with_having_support(condition, input_rows, context)
    }

    /// Execute filter with special HAVING support for aggregate functions
    fn execute_filter_with_having_support(