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Posted to dev@calcite.apache.org by "Dawid Wysakowicz (Jira)" <ji...@apache.org> on 2020/06/23 09:32:00 UTC

[jira] [Created] (CALCITE-4085) Improve nullability support for fields of structured type

Dawid Wysakowicz created CALCITE-4085:
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             Summary: Improve nullability support for fields of structured type
                 Key: CALCITE-4085
                 URL: https://issues.apache.org/jira/browse/CALCITE-4085
             Project: Calcite
          Issue Type: Improvement
          Components: core
            Reporter: Dawid Wysakowicz


As discussed in https://lists.apache.org/thread.html/r602ac95fff23dd1ef974fb396df7be061ab861384ec42f5c57ce0bc2%40%3Cdev.calcite.apache.org%3E I would like to change the way a type of a field of a record is derived at couple of locations. This helps frameworks such as Apache Flink to build support for nullable records with not null fields.

I suggest to change:
* SqlDotOperator#deriveType
* SqlItemOperator#inferReturnType
* AliasNamespace#validateImpl
* RexBuilder#makeFieldAccessInternal
* SqlValidatorImpl.DeriveTypeVisitor#visit(SqlIdentifier)



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