zoucao created FLINK-20701:
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             Summary: print connector supports outputting seriailzed record
                 Key: FLINK-20701
                 URL: https://issues.apache.org/jira/browse/FLINK-20701
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Ecosystem
    Affects Versions: 1.13.0
            Reporter: zoucao


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.



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