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https://issues.apache.org/jira/browse/FLINK-32993?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yubin Li updated FLINK-32993:
-----------------------------
    Description: 
create table as follows:

!image-2023-08-30-11-51-44-498.png!

results:

!image-2023-08-30-11-47-05-887.png!

I have found that Char type data length is 100 instead of defined 50.

we could help users to deal with the following data types in a proper way, thus 
allow the datagen connector to automatically generate data that conforms to the 
schema definition without manual configuration.
 # fixed-length data types (char, binary) , the length should be defined by 
original definion, and could not be user-defined length.
 # variable-length data types (varchar, varbinary), the length should be 
defined by original definition, and could be the user-defined length which less 
than original definition.

  was:
create table as follows:

!image-2023-08-30-11-51-44-498.png!

results:

!image-2023-08-30-11-47-05-887.png!

I have found that Char type data length is 100 instead of defined 50.

we could help users to deal with the following data types according to original 
definition, thus 
 # fixed-length data types (char, binary) , the length should be defined by 
original definion, and not be redefined by user's configuration.
 # variable-length data types (varchar, varbinary), the length should be 
defined by original definition, and could be redined the length which less than 
original definition by user's configuration.


> Datagen connector handles data types according to the original definition by 
> default
> ------------------------------------------------------------------------------------
>
>                 Key: FLINK-32993
>                 URL: https://issues.apache.org/jira/browse/FLINK-32993
>             Project: Flink
>          Issue Type: Improvement
>          Components: Connectors / Common
>    Affects Versions: 1.19.0
>            Reporter: Yubin Li
>            Priority: Major
>              Labels: pull-request-available
>         Attachments: image-2023-08-30-11-47-05-887.png, 
> image-2023-08-30-11-47-43-719.png, image-2023-08-30-11-51-44-498.png, 
> image-2023-08-30-13-44-10-106.png, image-2023-08-30-13-56-12-468.png, 
> image-2023-08-30-13-56-28-403.png
>
>
> create table as follows:
> !image-2023-08-30-11-51-44-498.png!
> results:
> !image-2023-08-30-11-47-05-887.png!
> I have found that Char type data length is 100 instead of defined 50.
> we could help users to deal with the following data types in a proper way, 
> thus allow the datagen connector to automatically generate data that conforms 
> to the schema definition without manual configuration.
>  # fixed-length data types (char, binary) , the length should be defined by 
> original definion, and could not be user-defined length.
>  # variable-length data types (varchar, varbinary), the length should be 
> defined by original definition, and could be the user-defined length which 
> less than original definition.



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