[FLINK-5299] DataStream support for arrays as keys

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Won't Do
• Affects Version/s: 1.2.0
• Component/s: API / DataStream
• Labels: star
• Assignee: Unassigned
• Reporter: Chesnay Schepler
• Created: 08/Dec/16 17:00
• Updated: 30/Mar/20 12:34
• Resolved: 30/Mar/20 12:34

Description

It is currently not possible to use an array as a key in the DataStream api, as it relies on hashcodes which aren't stable for arrays.

One way to implement this would be to check for the key type and inject a KeySelector that calls "Arrays.hashcode(values)".

Issue Links

• relates to: FLINK-5874 Reject arrays as keys in DataStream API to avoid inconsistent hashing