No database selected

Posted 2023-03-14 嘿;-)翔�

 The error may involve defaultParameterMap\\r\\n### The error occurred while setting parameters\\r\\n### SQL: SELECT --         year (item.updated_at) `year`, --         month (item.updated_at) `month`,         os.s_company_id as factoryId,         os.p_company_id as distributeId,         os.p_company_name as distributeName,         item.product_line_code as productLineCode,         item.product_line_name as productLineName,         sum (item.detail_amount) as totalAmount,         sum (item.purchase_num ) as totalQuantity         from `guoke-deepexi-saas-order-center`.odc_purchase_order_os os         INNER JOIN `guoke-deepexi-saas-order-center`.odc_purchase_order_item_os item   on os.id = item.order_id and os.dr = 0 and item.dr = 0         INNER JOIN `guoke-deepexi-saas-order-center`.star_order_operator_log l on os.sale_order_code = l.order_no and l.dr = 0         where 1=1                  GROUP BY         os.p_company_id, os.p_company_name,         item.product_line_code, item.product_line_name,         year (item.updated_at)         order by os.created_at desc\\r\\n### Cause: java.sql.SQLException: No database selected\\n; uncategorized SQLException; SQL state [3D000]; error code [1046]; No database selected; nested exception is java.sql.SQLException: No database selected

好一顿找，
1.检查 xml中末尾是否有 ‘；’号
2.检查是否有关键字 year，month 类似的字段
3.检查是否指定库表
4.检查函数后边是否使用有空格
我的报错原因就是 函数sum后边有空格，删除之后就没问题了