sunjincheng121 commented on a change in pull request #7196: [FLINK-10974] [table] Add support for flatMap to table API URL: https://github.com/apache/flink/pull/7196#discussion_r238476414
########## File path: docs/dev/table/tableApi.md ########## @@ -1682,6 +1682,60 @@ The `OverWindow` defines a range of rows over which aggregates are computed. `Ov {% top %} +### Map + +Map performs a map operation with an user-defined scalar function or built-in scalar function. The output will be flattened if the output type is a composite type. + +<div class="codetabs" markdown="1"> +<div data-lang="java" markdown="1"> +{% highlight java %} +ScalarFunction func = new MyMapFunction(); +tableEnv.registerFunction("func", func); + +Table table = input + .map(func("c")).as("a, b") +{% endhighlight %} +</div> + +<div data-lang="scala" markdown="1"> +{% highlight scala %} +val func: ScalarFunction = new MyMapFunction() + +val table = input + .map(func('c)).as('a, 'b) +{% endhighlight %} +</div> +</div> + +{% top %} + +### FlatMap + +FlatMap performs a flatMap operation with an user-defined table function. Review comment: `with an user-defined table function` -> `with a table function`? Because we can also add built-in table functions, What do you think? ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org With regards, Apache Git Services