提高从View获取数据的查询性能

Question

我有一个sql查询，从视图中只获取一条记录。我的视图是由很多函数组成的。它将归还大约6万张唱片。我想从这个视图中获取的最上面的记录是8-9秒。我如何优化我的视图，使它最多需要1-2秒。这是我的视图和sql查询。请帮助!任何建议都将是宝贵的。提前感谢。

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查询

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

Answer 1

哎哟。

用户定义函数是SQL server中最糟糕的性能破坏者，并且您的视图使用了大量的。UDF以逐行模式工作，因此需要一些时间。

尽量用内联SQL代替它们

Answer 2

内联sql不能对函数做什么?每个函数调用都将使用该给定函数的查询执行计划。如果您使用内联SQL来代替函数调用，那么将使用一个单一的总体(预期的最有效)查询执行计划。