[ARROW-16502] StructBuilder UnmarshalJSON does not handle missing optional fields

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 8.0.0
• Fix Version/s: 9.0.0
• Component/s: Go
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/31867
• Assignee: Unassigned
• Reporter: Przemysław Kowolik
• Created: 09/May/22 11:25
• Updated: 11/Jan/23 11:44
• Resolved: 12/May/22 17:48

Description

When calling array.StructBuilder.UnmarshalJSON with a JSON object that has missing optional fields, it fails to decode the JSON object properly and will panic - but it's a common behavior to drop empty/null fields from the JSON

Issue Links

• links to: GitHub Pull Request #13097