Question

我有一个sql查询，它只从View中获取一条记录。我的观点由很多功能组成。它返回了大约60,000条记录。我想从这个视图中获取的最高记录是8-9秒。如何优化我的视图，使其最多需要1-2秒。这是我的视图和SQL查询。请帮忙！任何建议都会令人感激。提前致谢。

CREATE View dbo.OMOrderPrePaymentINT    
As    

select   
   dbo.int_payment_customer_number_out('','OMOrderPaymentMasterINT',payment_id)  
   as customer_number,    
   dbo.int_customer_name_out('','OMOrderPaymentMasterINT',payment_id)     
   as customer_name,    
   dbo.int_FormatDate('','OMOrderPaymentMasterINT',document_date)      
   as payment_date,    
   dbo.int_payment_amount_out('','OMOrderPaymentMasterINT',document_amount)   
   as payment_amount,    
   dbo.int_checkbook_id_out('','OMOrderPaymentMasterINT',null)                         
   as checkbook_id,    
   dbo.int_cheque_number_out('','OMOrderPaymentMasterINT',payment_id)     
   as cheque_number,    
   dbo.int_cc_type_out ('','OMOrderPaymentMasterINT',payment_id)      
   as cc_type,    
   dbo.int_cc_number_out('','OMOrderPaymentMasterINT',payment_id)      
   as cc_number,    
   dbo.int_cc_authcode_out('','OMOrderPaymentMasterINT',payment_id)     
   as cc_authcode,    
   dbo.int_ach_account_type_out('','OMOrderPaymentMasterINT',payment_id)    
   as ach_account_type,    
   dbo.int_ach_account_number_out('','OMOrderPaymentMasterINT',payment_id)    
   as ach_account_number,    
   dbo.int_ach_authcode_out('','OMOrderPaymentMasterINT',payment_id)     
   as ach_authcode,    
   dbo.int_expiration_date_out('','OMOrderPaymentMasterINT',payment_id)    
   as creditcard_expiration_date,    
   dbo.int_order_payment_type_out('','OMOrderPaymentMasterINT',payment_id)          
   as payment_type,    
   dbo.int_payment_method_out('','OMOrderPaymentMasterINT',payment_id)     
   as payment_method,    
   dbo.int_erp_payment_action_out('','OMOrderPaymentMasterINT',null)     
   as [action],    
   dbo.int_modified_user_id_out('','',null)           
   as modified_user_id,    
   'NOT MAPPED'                  
   as void_date,    
   export_completed                 
   as exportcompleted,    
   dbo.int_ordergroup_id_out('','OMOrderPaymentMasterINT',payment_id)     
   as ordergroup_id,    
   'ECOM'                    
   as USRDEFND1,    
   dbo.int_ResponseToken_out('','OMOrderPaymentMasterINT',payment_id)     
   as USRDEFND4,    
   dbo.int_transaction_id_out('','OMOrderPaymentMasterINT',payment_id)     
   as USRDEFND5  
from PaymentLine 
where dbo.int_exportPayment(payment_id) = 1

SQL QUERY

select top 1  * 
from OMOrderPrePaymentINT 
where ordergroup_id = '943177C1-50B6-4E7C-A442-BA90CF2A03F6'     
order by payment_date desc

Answer 1

哎哟。

SQL Server中已知用户定义的函数为the worst performance offenders，您的视图使用很多。 UDF在row-by-row模式下工作，所以需要一段时间。

尝试使用内联SQL尽可能多地替换它们。

Answer 2

内联sql不能做什么功能？每个函数调用将使用该给定函数的查询执行计划。如果使用内联SQL代替函数调用，将使用一个单一的整体（预期最有效）查询执行计划。

提高查询从View中获取数据的性能

2 个答案: