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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (FLINK-6196) Support dynamic schema in Table Function
Date Wed, 05 Apr 2017 16:50:42 GMT

    [ https://issues.apache.org/jira/browse/FLINK-6196?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15957211#comment-15957211
] 

ASF GitHub Bot commented on FLINK-6196:
---------------------------------------

Github user fhueske commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3623#discussion_r109929426
  
    --- Diff: flink-libraries/flink-table/src/main/scala/org/apache/flink/table/functions/utils/TableSqlFunction.scala
---
    @@ -53,22 +54,9 @@ class TableSqlFunction(
         paramTypes,
         functionImpl) {
     
    -  /**
    -    * Get the user-defined table function.
    -    */
    -  def getTableFunction = udtf
    -
    -  /**
    -    * Get the type information of the table returned by the table function.
    -    */
    -  def getRowTypeInfo = rowTypeInfo
    -
    -  /**
    -    * Get additional mapping information if the returned table type is a POJO
    -    * (POJO types have no deterministic field order).
    -    */
    -  def getPojoFieldMapping = functionImpl.fieldIndexes
    --- End diff --
    
    are POJOs still supported?


> Support dynamic schema in Table Function
> ----------------------------------------
>
>                 Key: FLINK-6196
>                 URL: https://issues.apache.org/jira/browse/FLINK-6196
>             Project: Flink
>          Issue Type: Improvement
>          Components: Table API & SQL
>            Reporter: Zhuoluo Yang
>            Assignee: Zhuoluo Yang
>
> In many of our use cases. We have to decide the schema of a UDTF at the run time. For
example. udtf('c1, c2, c3') will generate three columns for a lateral view. 
> Most systems such as calcite and hive support this feature. However, the current implementation
of flink didn't implement the feature correctly.



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