[jira] [Created] (FLINK-28439) Support SUBSTR and REGEXP built-in function in Table API

[LuNing Wang (Jira)]

LuNing Wang created FLINK-28439:
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             Summary: Support SUBSTR and REGEXP built-in function in Table API 
                 Key: FLINK-28439
                 URL: https://issues.apache.org/jira/browse/FLINK-28439
             Project: Flink
          Issue Type: Improvement
          Components: API / Python, Table SQL / API
            Reporter: LuNing Wang
             Fix For: 1.16.0






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