codeant-ai-for-open-source[bot] commented on PR #38172:
URL: https://github.com/apache/superset/pull/38172#issuecomment-4041072805
## **Sequence Diagram**
This PR updates the result set conversion flow so that nested JSON and array
columns are tracked during PyArrow table construction and then restored as
Python dicts/lists when building the pandas DataFrame, while safely handling NA
detection, ensuring templates and API consumers receive real JSON objects
instead of stringified values.
```mermaid
sequenceDiagram
participant QueryExecutor
participant ResultSet
participant PyArrow
participant Pandas
participant TemplateEngine
QueryExecutor->>ResultSet: Initialize with DB rows including JSON
ResultSet->>PyArrow: Build column arrays
PyArrow-->>ResultSet: Indicate nested types or error
ResultSet->>ResultSet: Track nested columns and stringify for table
QueryExecutor->>ResultSet: Request pandas DataFrame
ResultSet->>Pandas: Convert table to DataFrame
ResultSet->>Pandas: Restore nested columns as Python objects
Pandas-->>TemplateEngine: Provide records with JSON preserved and NA
handled
```
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