[jira] [Created] (FLINK-13547) Verify and correct string function's semantic for Blink planner

[Zhenghua Gao (JIRA)]

Zhenghua Gao created FLINK-13547:
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             Summary: Verify and correct string function's semantic for Blink 
planner
                 Key: FLINK-13547
                 URL: https://issues.apache.org/jira/browse/FLINK-13547
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / Planner
    Affects Versions: 1.9.0, 1.10.0
            Reporter: Zhenghua Gao
             Fix For: 1.9.0, 1.10.0






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