Method check_basic_query_exists

graphlite/src/exec/executor.rs:1086–1097

Check if a basic query returns any results with early termination

(
        &self,
        query: &BasicQuery,
        outer_context: &ExecutionContext,
    )

    /// Check if a basic query returns any results with early termination
    fn check_basic_query_exists(
        &self,
        query: &BasicQuery,
        outer_context: &ExecutionContext,
    ) -> Result<bool, ExecutionError> {
        // For now, use the regular execution but optimize by checking for early termination
        // TODO: In the future, this could be optimized further with direct pattern matching
        let result = self.execute_basic_query_with_context(query, outer_context)?;

        // Return true if we found any results
        Ok(!result.rows.is_empty())
    }

    /// Execute a subquery with correlated variable support
    fn execute_subquery_with_context(