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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