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Posted to issues@flink.apache.org by GitBox <gi...@apache.org> on 2020/04/14 08:34:09 UTC

[GitHub] [flink] hequn8128 commented on a change in pull request #11531: [FLINK-16748][python][doc] Add Python UDTF doc

hequn8128 commented on a change in pull request #11531: [FLINK-16748][python][doc] Add Python UDTF doc
URL: https://github.com/apache/flink/pull/11531#discussion_r407943529
 
 

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 File path: docs/dev/table/functions/udfs.md
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 @@ -247,53 +253,51 @@ tableEnv.sqlQuery("SELECT a, word, length FROM MyTable LEFT JOIN LATERAL TABLE(s
 </div>
 
 <div data-lang="python" markdown="1">
-{% highlight python %}
-'''
-Java code:
+In order to define a Python table function, one can extend the base class TableFunction in pyflink.table.udtf and Implement an evaluation method. The behavior of a Python table function is determined by the evaluation method which is named eval.
 
 Review comment:
   class \`TableFunction\` in \`pyflink.table.udtf\`

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