Hongze Zhang created CALCITE-3029:
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Summary: Java-oriented field type is wrongly forced to be NOT NULL
after being converted to SQL-oriented
Key: CALCITE-3029
URL: https://issues.apache.org/jira/browse/CALCITE-3029
Project: Calcite
Issue Type: Bug
Affects Versions: 1.19.0
Reporter: Hongze Zhang
Fix For: 1.20.0
A Java-oriented field type loses its nullable constraint after calling method
{{org.apache.calcite.jdbc.JavaTypeFactoryImpl#toSql(org.apache.calcite.rel.type.RelDataType)}}.
It seems that this issue is introduced by CALCITE-2464 fix.
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