[jira] [Created] (FLINK-21991) flink varchar which exposes to users it not unified

[Shang Yuanchun (Jira)]

jackylau created FLINK-21991:
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             Summary: flink varchar which exposes to users it not unified
                 Key: FLINK-21991
                 URL: https://issues.apache.org/jira/browse/FLINK-21991
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 1.13.0
            Reporter: jackylau
             Fix For: 1.13.0



sql  VARCHAR: If no length is specified, n is equal to 1. which is not right.


calcite will transform the varchar to string
{code:java}
                    SqlDataTypeSpec type = regularColumn.getType();
                    boolean nullable = type.getNullable() == null ? true : type.getNullable();
                    RelDataType relType = type.deriveType(sqlValidator, nullable);
{code}




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