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[jira] [Created] (FLINK-9961) Add CHR function for table/sql API


vinoyang created FLINK-9961:
-------------------------------

             Summary: Add CHR function for table/sql API
                 Key: FLINK-9961
                 URL: https://issues.apache.org/jira/browse/FLINK-9961
             Project: Flink
          Issue Type: New Feature
          Components: Table API & SQL
            Reporter: vinoyang
            Assignee: vinoyang


This function convert ASCII code to a character,

refer to : [https://doc.ispirer.com/sqlways/Output/SQLWays-1-071.html]

Considering "CHAR" always is a keyword in many database, so we use "CHR" keyword.



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