[jira] [Created] (FLINK-17437) Use StringData instead of BinaryStringData in code generation

["Jark Wu (Jira)" <ji...@apache.org>]

Jark Wu created FLINK-17437:
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             Summary: Use StringData instead of BinaryStringData in code generation
                 Key: FLINK-17437
                 URL: https://issues.apache.org/jira/browse/FLINK-17437
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
            Reporter: Jark Wu


In FLINK-16996, we force to use {{BinaryStringData}} instead of {{StringData}} in code generation.  We hard cast StringData to BinaryStringData when {{RowData#getString}}. The motivation behind this is that this makes the code generator easily to generate opeartions based on string. There are too many invokings on the {{BinaryStringData}} now, if we use {{StringData}} in code generation, we have to refactor a lot of codes. 

However, this may be worth to do. Because using the public interface {{StringData}} is more straightforword.



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