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https://issues.apache.org/jira/browse/FLINK-7452?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16291070#comment-16291070
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ASF GitHub Bot commented on FLINK-7452:
---------------------------------------

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

    https://github.com/apache/flink/pull/4612#discussion_r156956540
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/api/Types.scala
 ---
    @@ -107,7 +180,9 @@ object Types {
         * @param keyType type of the keys of the map e.g. Types.STRING
    --- End diff --
    
    Add information about nullability of Map and entries?


> Add helper methods for all built-in Flink types to Types
> --------------------------------------------------------
>
>                 Key: FLINK-7452
>                 URL: https://issues.apache.org/jira/browse/FLINK-7452
>             Project: Flink
>          Issue Type: Improvement
>          Components: Type Serialization System
>            Reporter: Timo Walther
>            Assignee: Timo Walther
>
> Sometimes it is very difficult to provide `TypeInformation` manually, in case 
> some extraction fails or is not available. {{TypeHint}}s should be the 
> preferred way but this methods can ensure correct types.
> I propose to add all built-in Flink types to the {{Types}}. Such as:
> {code}
> Types.POJO(MyPojo.class)
> Types.POJO(Map<String, TypeInformation>)
> Types.GENERIC(Object.class)
> Types.TUPLE(TypeInformation, ...)
> Types.MAP(TypeInformation, TypeInformation)
> {code}
> The methods should validate that the returned type is exactly the requested 
> type. And especially in case of POJO should help creating  {{PojoTypeInfo}}.
> Once this is in place, we can deprecate the {{TypeInfoParser}}.



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