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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