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https://issues.apache.org/jira/browse/FLINK-16344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated FLINK-16344:
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Labels: pull-request-available (was: )
> Preserve nullability for nested types
> -------------------------------------
>
> Key: FLINK-16344
> URL: https://issues.apache.org/jira/browse/FLINK-16344
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / Planner
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
> Labels: pull-request-available
>
> Currently, FlinkTypeFactory does not always preserve nullability attributes
> when handling nested types.
> E.g. a table function that returns {{ROW<s STRING, sa ARRAY<STRING> NOT
> NULL>}} looses information to {{ROW<s STRING, sa ARRAY<STRING>>}}.
> Same for built-in functions such as {{COLLECT}} which results in mismatches
> as mentioned in FLINK-14042.
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