Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Unknown column 'p.knowlege_part_id.
MyBatis中,出现Unknowncolumn的提示是mapper.xml中的数据库字段写错了。错误示例:XxMapper.xml中s.knowledge_section_id,s.create_time,s.update_time,s.section_name,s.repository_id,s.bool_close,p.knowlege_part_id,p.create_time,p.upd