[转][Dapper]参数化查询慢

 

参考：https://www.cnblogs.com/wy123/p/7190785.html

参考：https://www.cnblogs.com/Irving/p/3951220.html

if object_id('tempdb..#t_remove_expired_plan') is not null
    drop table #t_remove_expired_plan
GO

create table #t_remove_expired_plan
(
    id int identity(1,1),
    plan_handle varbinary(500)
)
GO

insert into #t_remove_expired_plan (plan_handle)
select  qs.plan_handle
from sys.dm_exec_query_stats qs
where creation_time< dateadd(hh,-24,getdate())
GO

declare @exists_data bit = 1
declare @v_plan_handle varbinary(500)
declare @str_sql varchar(1000)
while @exists_data = 1
begin
    select top 1 @v_plan_handle = plan_handle from #t_remove_expired_plan
    if(@v_plan_handle is not null)
    begin
        execute sp_executesql N'DBCC FREEPROCCACHE(@plan_handle)' ,N'@plan_handle varbinary(500)',@plan_handle = @v_plan_handle
    end
    delete top (1) from #t_remove_expired_plan

    if exists(select 1 from #t_remove_expired_plan)
    begin
        set @exists_data = 1
    end
    else
    begin
        set @exists_data = 0
    end
end

参考：https://www.cnblogs.com/quanweiru/p/5577421.html