{"msg":"运行时异常:\n### Error querying database.  Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 20' at line 30\n### The error may exist in file [/data/webapps/ec-materials-front/WEB-INF/classes/mybatis/materials/ContentMapper.xml]\n### The error may involve defaultParameterMap\n### The error occurred while setting parameters\n### SQL: select           c.id, c.title, c.description, c.category_id,cat.short_name categoryShortName, c.subject_id,sub.short_name subjectShortName, c.classific_id, c.is_special, c.status, c.file_type, c.total_page, c.free_page, c.doc_size, c.doc_count, c.recommend_status, c.recommend_site, c.sort, c.creator, c.create_time, c.updator, c.update_time          ,sum(c.download_base + IFNULL(ch.download_count, 0)) download_base          ,sum(c.glance_base + IFNULL(ch.glance_count, 0)) glance_base,c.short_title          from ec_mat_content c left join ec_mat_content_hot ch ON c.id = ch.content_id           join ec_mat_category cat on cat.id = c.category_id        join ec_mat_subject sub on sub.id = c.subject_id         where           c.status = 1          AND c.is_special = 0                    AND c.id  not in          (      ?     ,     ?     ,     ?     ,     ?     ,     ?     )                       and c.subject_id = ?   GROUP BY c.id  order by download_base desc  limit ? LIMIT ?\n### Cause: java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 20' at line 30\n; bad SQL grammar []; nested exception is java.sql.SQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'LIMIT 20' at line 30","code":500}