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[jira] [Created] (FLINK-9907) add CRC32 checksum in table Api and sql

xueyu created FLINK-9907:

             Summary: add CRC32 checksum in table Api and sql
                 Key: FLINK-9907
                 URL: https://issues.apache.org/jira/browse/FLINK-9907
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: xueyu

CRC32 returns the cyclic redundancy check value of a given string as a 32-bit unsigned value, null if string is null. In mysql and hive the syntax like

select CRC32('test') = 3632233996

Though it is not a hash function, however the pattern and behavior looks similar with hash functions (md5, sha1, sha2 etc..), so I put codegen in HashCalcCallGen

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