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https://issues.apache.org/jira/browse/FLINK-4081?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15411602#comment-15411602
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ASF GitHub Bot commented on FLINK-4081:
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Github user twalthr commented on the issue:
https://github.com/apache/flink/pull/2297
The length is not sufficient to differentiate between empty column and
empty string.
E.g. if you have quoted strings: `,,` and `,"",`
With the changes in this PR we don't modify the return values, but deposit
the information of an empty column in the error state.
> 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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