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https://issues.apache.org/jira/browse/FLINK-14356?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16949244#comment-16949244
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Timo Walther commented on FLINK-14356:
--------------------------------------

If we go for STRING as well, I suggest to implement at least: 
CHAR/VARCHAR/BINARY/VARBINARY/TINYINT/INT/SMALLINT/BIGINT. The implementation 
effort is not very big. 

> Introduce "single-field" format to (de)serialize message to a single field
> --------------------------------------------------------------------------
>
>                 Key: FLINK-14356
>                 URL: https://issues.apache.org/jira/browse/FLINK-14356
>             Project: Flink
>          Issue Type: Improvement
>          Components: Formats (JSON, Avro, Parquet, ORC, SequenceFile), Table 
> SQL / API
>            Reporter: jinfeng
>            Assignee: jinfeng
>            Priority: Major
>
> I want to use flink sql to write kafka messages directly to hdfs. The 
> serialization and deserialization of messages are not involved in the middle. 
>  The bytes of the message directly convert the first field of Row.  However, 
> the current RowSerializationSchema does not support the conversion of bytes 
> to VARBINARY. Can we add some special RowSerializationSchema and 
> RowDerializationSchema ? 



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