[Bug]: Unable to use @FieldAccess in DoFn for fetching Nullable Schema Fields

[R1421]

What happened?

This is not my issue, but I have the same issue for java.lang.String and STRING. The full stack overflow post is here:

I'm attempting to do the following in my DoFn to extract a double value from an existing nullable field in my schema:
@FieldAccess("field1") Double field1
However I'm getting the following exception:
java.lang.IllegalArgumentException: Element argument type java.lang.Double does not work with expected schema field type DOUBLE
On debugging, the issue seems to be in ConvertHelpers.getConvertPrimitive(). Specifically, StaticSchemaInference.fieldFromType() seems to return FieldType DOUBLE NOT NULL regardless of whether a Double object or a primitive double is specified. This also then seems to cause a mismatch to the schema type which is only DOUBLE (i.e, without the NOT NULL).

Issue Priority

Priority: 2 (default / most bugs should be filed as P2)

Issue Components

• Component: Python SDK
• Component: Java SDK
• Component: Go SDK
• Component: Typescript SDK
• Component: IO connector
• Component: Beam YAML
• Component: Beam examples
• Component: Beam playground
• Component: Beam katas
• Component: Website
• Component: Spark Runner
• Component: Flink Runner
• Component: Samza Runner
• Component: Twister2 Runner
• Component: Hazelcast Jet Runner
• Component: Google Cloud Dataflow Runner

[github-actions]

This issue has been marked as stale due to 150 days of inactivity. It will be closed in 30 days if no further activity occurs. If you think that’s incorrect or this issue still needs to be addressed, please simply write any comment. If closed, you can reopen the issue at any time. Thank you for your contributions.

[github-actions]

This issue has been closed due to lack of activity. If you think that is incorrect, you can reopen the issue at any time.