In airbyte when i sync bigquery to pubsub the value in stream comes in a string but when i sync github or hubspot to pubsub the value came as a sequence. What dictates the type of the value sent to a connector? how can i ensure it's consistent or at least predict it?

To answer your question about data types in Airbyte when syncing to Pub/Sub, I'll need to provide some context and explain a few key concepts. Airbyte uses a standardized type system for data passing between connectors. However, the actual data types that end up in the destination can vary based on several factors: 1. Source connector implementation: Different source connectors may interpret and emit data types differently. 2. Destination connector implementation: The destination connector (in this case, Pub/Sub) may handle incoming data types in its own way. 3. Airbyte's type system and any type conversions that happen during the sync process. According to the Airbyte documentation on [Data Types in Records](https://docs.airbyte.com/understanding-airbyte/supported-data-types): "AirbyteRecords are required to conform to the Airbyte type system. This means that all sources must produce schemas and records within these types, and all destinations must handle records that conform to this type system." However, it's important to note that: "Destinations must have handling for all types, but they are free to cast types to a convenient representation." [Unsupported types](https://docs.airbyte.com/understanding-airbyte/supported-data-types#unsupported-types) This means that the Pub/Sub destination connector might be handling data types from different sources in varying ways. To predict or ensure consistency, you would need to: 1. Check the specific implementation of the BigQuery, GitHub, and HubSpot source connectors to see how they emit data types. 2. Review the Pub/Sub destination connector implementation to understand how it handles incoming data types. 3. Consider using Airbyte's [typing and deduping feature](https://docs.airbyte.com/using-airbyte/core-concepts/#typing-and-deduping) if applicable to your use case. Unfortunately, I don't have specific information about the Pub/Sub destination connector's behavior with different sources. To get a definitive answer and ensure consistency, you may need to: 1. Check the source code of the relevant connectors. 2. Consult Airbyte's documentation for any Pub/Sub-specific type handling information. 3. Reach out to Airbyte's community or support channels for more detailed guidance on this specific scenario. If you need predictable and consistent type handling, you might consider using a destination that offers more control over data types, or implement custom type handling in your Pub/Sub consumer application.

Ok i understand that.. now I want to confirm something seperate. in the documentation for pubsub i noticed it says Output schema Each stream will be output a PubSubMessage with attributes. The message attributes will be • `_stream`: the name of stream where the data is coming from However I am noticing that the type of the value returned in _stream is not always consistent (i.e. string).. what defines this?

Based on the information provided in the knowledge sources, I don't have specific details about inconsistencies in the type of the

_stream

attribute for PubSub messages. The documentation you referenced [PubSub Output Schema](https://docs.airbyte.com/integrations/destinations/pubsub#pubsub) does state that

_stream

should contain the name of the stream where the data is coming from, but it doesn't specify the exact data type. However, I can provide some general insights about data types in Airbyte: 1. Airbyte has a system for handling various data types, including automatic type transformations in some cases. For example, the [Default type transformation](https://docs.airbyte.com/connector-development/cdk-python/schemas#default-type-transformation) can cast values to match the declared schema. 2. The [AirbyteRecordMessage](https://docs.airbyte.com/understanding-airbyte/airbyte-protocol#airbyterecordmessage) specification requires the

stream

field, but it doesn't explicitly define its type. It's described as a string in the documentation, but the actual implementation might vary. 3. Airbyte also has provisions for [Unsupported types](https://docs.airbyte.com/understanding-airbyte/supported-data-types#unsupported-types), where destinations are allowed to cast types to a convenient representation if they can't handle the original type natively. Given these points, it's possible that the inconsistency you're observing in the

_stream

type could be due to type transformations or how different connectors or destinations handle this field. However, without more specific information about your setup or the exact inconsistencies you're seeing, I can't provide a definitive answer. If you're experiencing unexpected behavior, it might be worth checking your specific connector and destination configurations, or reaching out to Airbyte's support channels for more detailed assistance.