[jira] [Created] (CASSGO-115) MapScan does not preserve top-level UDT values (returns empty map)

["Stanislav Bychkov (Jira)" <ji...@apache.org>]

Stanislav Bychkov created CASSGO-115:
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             Summary: MapScan does not preserve top-level UDT values (returns empty map) 
                 Key: CASSGO-115
                 URL: https://issues.apache.org/jira/browse/CASSGO-115
             Project: Apache Cassandra Go driver
          Issue Type: Bug
          Components: Core
            Reporter: Stanislav Bychkov


When reading rows that contain a top-level UDT column, MapScan() does not preserve the decoded UDT field values.
For a top-level frozen<udt> column:

* Scan(...) can decode the UDT correctly
* MapScan(...) returns the row, but the UDT value is an empty map[string]interface{}

h4. Expected behavior
MapScan should preserve top-level UDT contents consistently with Scan
A non-null UDT column should decode into a populated map[string]interface{} containing its field values

h4. This is particularly problematic because:
The column itself is present
No error is raised
The data is silently lost rather than missing or failing loudly



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