[jira] [Updated] (FLINK-16344) Preserve nullability for nested types

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-16344?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

ASF GitHub Bot updated FLINK-16344:
-----------------------------------
    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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