[jira] [Created] (FLINK-6978) Add documentation for Register User-Defined Functions.

[Shang Yuanchun (Jira)]

sunjincheng created FLINK-6978:
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             Summary: Add documentation for Register User-Defined Functions.
                 Key: FLINK-6978
                 URL: https://issues.apache.org/jira/browse/FLINK-6978
             Project: Flink
          Issue Type: Improvement
          Components: Documentation, Table API & SQL
    Affects Versions: 1.4.0
            Reporter: sunjincheng


The User-defined Functions documentation is currently lacking a description of Register User-Defined Functions.
The page has a placeholder section with a TODO: ./docs/dev/table/udfs.md.



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