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https://issues.apache.org/jira/browse/CALCITE-3351?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16931072#comment-16931072
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Danny Chan commented on CALCITE-3351:
-------------------------------------

The exception is thrown from avatica, and it seems that it is related with 
CALCITE-2704, there is already a fix from [~vlsi][1].

[1] [https://github.com/apache/calcite-avatica/pull/85]

> calcite mysql utf8 throws exception in Chinese
> ----------------------------------------------
>
>                 Key: CALCITE-3351
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3351
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.19.0
>         Environment: Happened on both Windows and MacOS.
>            Reporter: cui
>            Priority: Major
>   Original Estimate: 24h
>  Remaining Estimate: 24h
>
> Exception was thrown when connecting with mySQL to query Chinese. The 
> following SQL was executed: 
> select * from \"test\".\"score_new\" where \"name\"= \'催\' limit 1
> ,if change "getDefaultCharset" in  "RelDataTypeFactoryImpl" to 
> return Charset.forName("UTF8");
> there will be also exception thrown as the following:
> java.sql.SQLException: Error while executing SQL "select * from 
> "test"."score_new" where "name"= '催' limit 1": While executing SQL [SELECT 
> *java.sql.SQLException: Error while executing SQL "select * from 
> "test"."score_new" where "name"= '催' limit 1": While executing SQL [SELECT 
> *FROM `score_new`WHERE `name` = u&'\50ac'LIMIT 1] on JDBC sub-schema at 
> org.apache.calcite.avatica.Helper.createException(Helper.java:56) at 
> org.apache.calcite.avatica.Helper.createException(Helper.java:41) at 
> org.apache.calcite.avatica.AvaticaStatement.executeInternal(AvaticaStatement.java:163)
>  at 
> org.apache.calcite.avatica.AvaticaStatement.executeQuery(AvaticaStatement.java:227)
>  at QueryMysql.main(QueryMysql.java:42)Caused by: java.lang.RuntimeException: 
> While executing SQL [SELECT *FROM `score_new`WHERE `name` = u&'\50ac'



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