Lynch Lee created FLINK-8551:

             Summary: Should BIGINT in Flink SQL will be enchance to 
                 Key: FLINK-8551
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
    Affects Versions: 1.4.0
            Reporter: Lynch Lee
             Fix For: 1.4.0

As we all known , see 

SQL data type BIGINT in mysql represents UNSIGNED BIGINT by default , it can 
receive value from some columns typed Long or BigInteger if we use java/scala 
driver to write data into db.
|{{BIGINT[(M)] [UNSIGNED]}}|{{BIGINT [UNSIGNED]}}|{{java.lang.Long}}, if 
UNSIGNED {{java.math.BigInteger}}|


By now , in Flink SQL BIGINT just represents SIGNED BIGINT, that to say it can 
only receive value from some columns typed Long .

all supported types of the Table API defined in this class 


so if we should let BIGINT in Flink SQL match the BIGINT in some SQL Engine , 
like MySQL.





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