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https://issues.apache.org/jira/browse/FLINK-29558?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17617419#comment-17617419
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Hang HOU commented on FLINK-29558:
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[~martijnvisser] Thanks for the security notice.What's more, if I used flink
sql to connect hudi or hive table(there do exist the table and some record in
hudi or hive sides),execute sql like 'select count(\*) from table1;' could get
the correct result, but when do the save query to mysql or Tidb(both connect
by jdbc), the exception always show up,and I connected mysql by mysql client to
check the table with same sql execution, 'select count(\*) from table1;'
result is fine and correct.
If you never meet this situation,I guess the problem have some relation with
mysql-connector-java**.jar in flink/lib
> Use select count(*) from xxx; and get SQL syntax
> ------------------------------------------------
>
> Key: FLINK-29558
> URL: https://issues.apache.org/jira/browse/FLINK-29558
> Project: Flink
> Issue Type: Bug
> Components: Connectors / JDBC
> Affects Versions: 1.15.2
> Environment: flink 1.15.2
> CentOS Linux release 7.9.2009 (Core)
> 5.7.32-log MySQL Community Server (GPL)
> Reporter: Hang HOU
> Priority: Major
> Attachments: image-2022-10-10-15-31-34-341.png
>
>
> Hi, I use flink sql to make kafka records to mysql.
> so I create these 2 tables in flink sql,here is the mysql ,and I created the
> table in mysql before I did the insert action in flink sql.
> CREATE TABLE mysql_MyUserTable (
> id STRING,
> name STRING,
> age STRING,
> status STRING,
> PRIMARY KEY (id) NOT ENFORCED
> ) WITH (
> 'connector' = 'jdbc',
> 'url' = 'jdbc:mysql://10.19.29.170:3306/fromflink152',
> 'table-name' = 'users',
> 'username' = 'root',
> 'password' = '******'
> );
> In mysql, I created database "fromflink152" then created the table like this
> way
> CREATE TABLE `users` (
> `id` varchar(64) NOT NULL DEFAULT '',
> `name` varchar(255) DEFAULT NULL,
> `age` varchar(255) DEFAULT NULL,
> `status` varchar(255) DEFAULT NULL,
> PRIMARY KEY (`id`)
> )
> After executed insert sql,I found 'select * from mysql_MyUserTable' can get
> correct result,but ’select count(\*) from mysql_MyUserTable‘ or ’select
> count(id) from mysql_MyUserTable‘ ,the collect job in flink app keep
> restarting again and again.The exception is:
> !image-2022-10-10-15-31-34-341.png!
> So I wonder which config that I missed about the table in flink or mysql side
> :(
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