提高从 View 获取数据的查询性能

Posted 2023-02-26

【中文标题】提高从 View 获取数据的查询性能

【英文标题】：Improve performance of query fetching data from View

【发布时间】：2012-12-24 09:40:16

【问题描述】：

我有一个 sql 查询，它只从 View 中获取一条记录。我的观点是由很多功能组成的。它返回大约 60,000 条记录。 我想从这个视图中获取的最高记录需要 8-9 秒。 我如何优化我的视图，使其最多需要 1-2 秒。 这是我的视图和sql查询。请帮忙！任何建议都将是可观的。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 查询

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

【参考方案1】：

哎哟。

用户定义的函数在 SQL server 中被称为the worst performance offenders，您的视图使用了很多。 UDF在row-by-row模式下工作，所以需要一段时间。

尽量用内联 SQL 替换它们。

【参考方案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 代替函数调用，则将使用一个整体（预计最有效）查询执行计划。