dosubot[bot] commented on issue #37363: URL: https://github.com/apache/superset/issues/37363#issuecomment-3783911203
<!-- Greeting --> Hi @gaboraron! I'm [Dosu](https://go.dosu.dev/dosubot) and I’m helping the superset team. <!-- Answer --> This is a known limitation in Superset's handling of complex types like maps, arrays, and JSON. Superset often maps these types to generic strings internally, which can cause issues when special characters are present—leading to NULL values or incorrect rendering in SQL Lab. This happens because the serialization and deserialization logic doesn't fully support these types, especially when special characters are involved, and can misinterpret or drop values during processing. Casting the map field to JSON works as a workaround because it serializes the value in a way that avoids these parsing issues and ensures the data is displayed as expected. There isn't a configuration option to change this behavior right now; casting to JSON (or TEXT for other types) in your query is the most reliable workaround until Superset improves support for complex types in future releases. This pattern is not unique to Athena and can affect other databases and data types as well. For more details, se e [this related discussion](https://github.com/apache/superset/issues/25125) and [this issue about serialization](https://github.com/apache/superset/issues/19388). <!-- Dosu Comment Footer --> *To reply, just mention [@dosu](https://go.dosu.dev/dosubot).* --- <sup>How did I do? [Good](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=great_response) | [Irrelevant](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=irrelevant_answer) | [Incorrect](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=incorrect_sources) | [Verbose](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=too_verbose) | [Hallucination](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=hallucination) | [Report 🐛](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=bug_report) | [Other](https://app.dosu.dev/response-feedback/96704427-dde9-4be1-99e4-bd2c0fad3f42?feedback_type=other)</sup> [](https://app.dosu.dev/a28d3c7e-a9d3-459e-9fb6-3a6f9ff4f357/ask?utm_source=github) [](https://cursor.com/link/prompt?text=This%20is%20a%20known%20limitation%20in%20Superset%27s%20handling%20of%20complex%20types%20like%20maps%2C%20arrays%2C%20and%20JSON.%20Superset%20often%20maps%20these%20types%20to%20generic%20strings%20internally%2C%20which%20can%20cause%20issues%20when%20special%20characters%20are%20present%E2%80%94leading%20to%20NULL%20values%20or%20incorrect%20rendering%20in%20SQL%20Lab.%20This%20happens%20because%20the%20serialization%20and%20deserialization%20logic%20doesn%27t%20fully%20support%20these%20types%2C%20especially%20when%20special%20characters%20are%20involved%2C%20and%20can%20misinterpret%20or%20drop%20values%20during%20processing.%20Casting%20the%20map%20field%20to%20JSON%20works%20as%20a%20workaround%20because%20it%20serializes%20the%20value%20in %20a%20way%20that%20avoids%20these%20parsing%20issues%20and%20ensures%20the%20data%20is%20displayed%20as%20expected.%20There%20isn%27t%20a%20configuration%20option%20to%20change%20this%20behavior%20right%20now%3B%20casting%20to%20JSON%20%28or%20TEXT%20for%20other%20types%29%20in%20your%20query%20is%20the%20most%20reliable%20workaround%20until%20Superset%20improves%20support%20for%20complex%20types%20in%20future%20releases.%20This%20pattern%20is%20not%20unique%20to%20Athena%20and%20can%20affect%20other%20databases%20and%20data%20types%20as%20well.%20For%20more%20details%2C%20see%20%5Bthis%20related%20discussion%5D%28https%3A//github.com/apache/superset/issues/25125%29%20and%20%5Bthis%20issue%20about%20serialization%5D%28https%3A//github.com/apache/superset/issues/19388%29.) [](https://go.dosu.dev/discord-bot) [](https://twitte r.com/intent/tweet?text=%40dosu_ai%20helped%20me%20solve%20this%20issue!&url=https%3A//github.com/apache/superset/issues/37363) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected] --------------------------------------------------------------------- To unsubscribe, e-mail: [email protected] For additional commands, e-mail: [email protected]
