java.sql.SQLException: ORA-12704: 字符集不匹配

INFO:HibernateSimpleDao----queryForListWithSql:SELECT site_id as id ,
MAX(case attr_name when 'siteName' then attr_value END) as siteName,
MAX(case attr_name when 'userName' then attr_value END) as userName,
MAX(case attr_name when 'password' then attr_value END) as password,
MAX(case attr_name when 'tjSiteId' then attr_value END) as tjSiteId,
MAX(case attr_name when 'tjToken' then attr_value END) as tjToken
FROM jc_site_attr where attr_name in ('siteName','userName','password','tjToken','tjSiteId') GROUP BY site_id ORDER BY site_id
2019-07-26 09:49:32 上午 [Thread: http-8080-4][ Class:com.mchange.v2.c3p0.impl.NewPooledConnection Method: com.mchange.v2.log.slf4j.Slf4jMLog$Slf4jMLogger$DebugLogger.log(Slf4jMLog.java:207) ]
DEBUG:com.mchange.v2.c3p0.impl.NewPooledConnection@1e59541 handling a throwable.
java.sql.SQLException: ORA-12704: 字符集不匹配

nvarchar2  改成varcar2