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https://issues.apache.org/jira/browse/FLINK-4081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15411745#comment-15411745
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ASF GitHub Bot commented on FLINK-4081:
---------------------------------------

Github user StephanEwen commented on the issue:

    https://github.com/apache/flink/pull/2297
  
    Okay, I think the main source of confusion here is that `EMPTY_STRING` does 
actually not refer to an empty string (as specific to the string parser) but to 
something like "null", "empty column", or "missing value".
    
    Let's call it something like that and then it actually makes sense to me to 
communicate that via an error state. Because it is actually not a regular value 
(as an empty string would be).



> FieldParsers should support empty strings
> -----------------------------------------
>
>                 Key: FLINK-4081
>                 URL: https://issues.apache.org/jira/browse/FLINK-4081
>             Project: Flink
>          Issue Type: Bug
>          Components: Core
>            Reporter: Flavio Pompermaier
>            Assignee: Timo Walther
>              Labels: csvparser, table-api
>
> In order to parse CSV files using the new Table API that converts rows to Row 
> objects (that support null values), FiledParser implementations should 
> support emptry strings setting the parser state to 
> ParseErrorState.EMPTY_STRING (for example FloatParser and DoubleParser 
> doesn't respect this constraint)



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