使用flink mysql cdc时报错，原因是该用户没有mysql的reload权限：

Caused by: java.sql.SQLSyntaxErrorException: Access denied; you need (at least one of) the RELOAD privilege(s) for this operation
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:120)
	at com.mysql.cj.jdbc.exceptions.SQLError.createSQLException(SQLError.java:97)
	at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:122)
	at com.mysql.cj.jdbc.StatementImpl.executeInternal(StatementImpl.java:782)
	at com.mysql.cj.jdbc.StatementImpl.execute(StatementImpl.java:666)
	at io.debezium.jdbc.JdbcConnection.executeWithoutCommitting(JdbcConnection.java:1201)
	at io.debezium.connector.mysql.SnapshotReader.execute(SnapshotReader.java:465)
	... 3 more

关于mysql的reload权限可以参考：https://blog.csdn.net/q3dxdx/article/details/51005613

这类权限的授权不是针对某个数据库的，因此须使用on *.*来进行：

grant reload on *.* to 'user_name'@'%';