Sergey Nuyanzin created FLINK-31350:
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Summary: Support Calcite's 1.30+ UnknownType
Key: FLINK-31350
URL: https://issues.apache.org/jira/browse/FLINK-31350
Project: Flink
Issue Type: Sub-task
Components: Table SQL / API
Affects Versions: 1.18.0
Reporter: Sergey Nuyanzin
In 1.30 in Calcite https://issues.apache.org/jira/browse/CALCITE-4872 there has
been introduced a new type UNKNOWN which is similar to NULL however is not
nullable by default and as a result breaks some tests.
I guess a similar type should be introduced in Flink to support it
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