Aditya Toomula created SAMZA-2345:
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             Summary: Samza-sql: Change RelSchemaConverter code to apply 
nullability based on Sql schema
                 Key: SAMZA-2345
                 URL: https://issues.apache.org/jira/browse/SAMZA-2345
             Project: Samza
          Issue Type: Bug
            Reporter: Aditya Toomula
            Assignee: Aditya Toomula


Currently, RelSchemaConverter which converts Sql schema to Calcite schema 
always marks the fields as nullable regardless of nullable flag in Sql schema.

To address this problem, we need to first fix all RelSchemaProviders to 
accurately represent the fields with the right structure (Linkedin specific 
code for BrooklinRelSchemaProvider has a problem with representing few fields.).



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