[
https://issues.apache.org/jira/browse/FLINK-11785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16780616#comment-16780616
]
sunjincheng commented on FLINK-11785:
-------------------------------------
+1 for your personal [~twalthr]
> Replace case class Null(type) in Table API
> ------------------------------------------
>
> Key: FLINK-11785
> URL: https://issues.apache.org/jira/browse/FLINK-11785
> Project: Flink
> Issue Type: Improvement
> Components: API / Table SQL
> Reporter: Timo Walther
> Assignee: Timo Walther
> Priority: Major
> Labels: pull-request-available
> Time Spent: 10m
> Remaining Estimate: 0h
>
> FLINK-11449 has shown parts of the API that have not been designed properly.
> Especially, direct usages of case classes that will be only in the planner
> module should not be exposed through the API.
> Using {{null}} for representing a null literal is currently not supported in
> the Table API as a general {{NULL}} type and/or proper type inference is
> missing. Therefore, nulls must be typed using {{Null(Type.STRING)}}. However,
> this encourages users to use case classes instead of the Scala DSL.
> We could implement a implicit object for {{Null}}, however, all functions and
> literals currently start with a lower case except for this object. I would
> recommend to introduce {{nullOf(type)}} instead. This would allow us to have
> {{nullOf(type)}} and {{null}} in the future.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
