[FLINK-20701] print connector supports outputting seriailzed record

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Invalid
• Affects Version/s: 1.13.0
• Component/s: Table SQL / Ecosystem
• Assignee: Unassigned
• Reporter: zoucao
• Created: 21/Dec/20 16:23
• Updated: 27/Jan/21 14:40
• Resolved: 27/Jan/21 14:40

Description

Hi all， print connector is designed for debugging，and it gives us better access to data. If I want to debug source connector and SQL statement, I will use it to print the result. However, I don't have a good choice to observe the seriailzed record, which will be sent to external connector when debugging. Consequently, we 'd better make print connetcor support outputting seriailzed record. We can use format=XXX to identify a seriailzed schema, help user to debug and understand the process of serialization.