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https://issues.apache.org/jira/browse/FLINK-4598?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15473139#comment-15473139
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Timo Walther commented on FLINK-4598:
-------------------------------------
I wonder if we have to support all functions in the Table API that are
supported in SQL. Because SQL has a very large amount of functions while the
Table API currently has only the very basic ones. Is {{NULLIF}} a function that
is needed very often? We can support it in the Table API, I'm just worried
about the large amount of implicit functions.
> Support NULLIF in Table API
> ----------------------------
>
> Key: FLINK-4598
> URL: https://issues.apache.org/jira/browse/FLINK-4598
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Jark Wu
> Assignee: Jark Wu
>
> This could be a subtask of [FLINK-4549]. As Flink SQL has supported
> {{NULLIF}} implicitly. We should support it in Table API.
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