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https://issues.apache.org/jira/browse/CALCITE-4014?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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groobyming updated CALCITE-4014:
--------------------------------
    Description: 
    Hello everyone, I found that when performing the following sql 
verification, I will be prompted that the UTF8MB4 field cannot be found in the 
table, but after reading the source code calcite is built-in to support this 
convert function, is it not fully implemented yet?

 

SQL is as follows:

select convert(name using utf8mb4) from test b where name = '4'

 

Error Message:

   !image-2020-05-20-17-00-28-611.png!

  was:
    Hello everyone, I found that when performing the following sql 
verification, I will be prompted that the UTF8MB4 field cannot be found in the 
table, but after reading the source code calcite is built-in to support this 
convert function, is it not fully implemented yet?

 

SQL is as follows:

select convert(name using utf8mb4) from test b where name = '4'

 

Error Message:

  !image-2020-05-20-17-00-28-611.png!


> calcite convert(column using utf8mb4) throws exception
> ------------------------------------------------------
>
>                 Key: CALCITE-4014
>                 URL: https://issues.apache.org/jira/browse/CALCITE-4014
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.21.0
>            Reporter: groobyming
>            Priority: Major
>         Attachments: image-2020-05-20-17-00-28-611.png
>
>
>     Hello everyone, I found that when performing the following sql 
> verification, I will be prompted that the UTF8MB4 field cannot be found in 
> the table, but after reading the source code calcite is built-in to support 
> this convert function, is it not fully implemented yet?
>  
> SQL is as follows:
> select convert(name using utf8mb4) from test b where name = '4'
>  
> Error Message:
>    !image-2020-05-20-17-00-28-611.png!



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