[BEAM-6772] Select transform has non-intuitive semantics

• Type: Sub-task
• Status: Resolved
• Priority: P2
• Resolution: Fixed
• Fix Version/s: 2.12.0
• Component/s: sdk-java-core
• Labels: Done
• Assignee: Reuven Lax
• Reporter: Reuven Lax
• Created: 06/Mar/19 22:56
• Updated: 06/Oct/20 21:58
• Resolved: 16/May/19 07:11

Description

Consider the following schema:

User:

    name: STRING

    location: Location

 

Location:

    latitude: DOUBLE

    longitude: DOUBLE

 

If you apply Select.fieldNames("location"), most users expect to get back a row matching the Location schema. Instead you get back an outer schema with a single location field in it. Select should instead unnest the output up to the point where multiple fields are selected.

Issue Links

• links to: GitHub Pull Request #8006