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https://issues.apache.org/jira/browse/FLINK-18417?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17142935#comment-17142935
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Dawid Wysakowicz commented on FLINK-18417:
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Sounds reasonable to me. I think native {{List}} support will be very helpful
in UDFs.
> Support List as a conversion class for ARRAY
> --------------------------------------------
>
> Key: FLINK-18417
> URL: https://issues.apache.org/jira/browse/FLINK-18417
> Project: Flink
> Issue Type: Sub-task
> Components: Table SQL / API
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
>
> Currently we don't support {{List}} as a conversion class in the new type
> system. However, there are multiple reasons why we should support this
> conversion:
> 1) Hive uses {{List}} as the default for representing arrays e.g. in
> functions.
> 2) The new Expression DSL supports converting lists to array literals already.
> 3) The list interface is essential for Java users and part of many structured
> types.
> 4) We need to represent lists in {{ListView}} for aggregate functions.
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