动态SQL中返回数值的实现代码

ALTER proc [dbo].[sp_common_paypal_AddInfo]
(
@paypalsql varchar(max),–不包含用户表的paypalsql语句
@paypalusersql varchar(max),–paypal用户表的sql语句
@ebaysql varchar(max),–不包含用户表的ebaysql语句
@ebayusersql varchar(max),–ebay的用户表sql语句
@paypaluserwhere varchar(max),–paypal用户表查询ID语句
@ebayuserwhere varchar(max),–ebay用户表查询ID语句
@websql varchar(max),–web除去用户表的sql语句
@webusersql varchar(max),–web用户表的sql语句
@webwhere varchar(max),–web用户表where之后的sql语句
@ebaystockflag varchar(10),–ebay订单号生成规则
@webstockflag varchar(10)–web订单号生成规则
)
as
set xact_abort on
begin transaction mytrans
begin try
declare @uid int–根据语句查找用户ID
declare @execsql varchar(max)
declare @ebayuid int–根据语句查找用户ID
declare @execebaysql nvarchar(max)–用sp_executesql 字段类型必须是nvarchar
declare @sql nvarchar(max)–用sp_executesql 字段类型必须是nvarchar
set @sql=’select @a=ID from tb_TransactionCustomer where ‘+ convert(varchar(8000),@paypaluserwhere)
exec sp_executesql @sql,N’@a int output’,@uid output
set @uid =ISNULL(@uid,0)–如果不这样判断 获取的值可能为null用len()获取不到长度
–存在paypal用户id
if(@uid>0)
begin
set @execsql=@paypalsql– 存在用户信息
set @execsql= REPLACE(@execsql,’@uid’,”+convert(varchar,@uid)+”)
end
else
begin
set @execsql=@paypalusersql+@paypalsql –不存在用户信息
end
if(LEN(@websql)>0)–执行web语句
begin
exec sp_common_WebSiteorder_AddInfo @websql, @webusersql, @webwhere ,@webstockflag
end
if(LEN(@ebaysql)>0)–执行ebay语句
begin
–exec sp_common_Ebay_AddInfo @ebaysql, @ebayusersql, @ebayuserwhere ,@ebaystockflag
SELECT * FROM tb_EbayOrder WITH (TABLOCKX)
SELECT * FROM tb_EbayOrderList WITH (TABLOCKX)
SELECT * FROM tb_EbayOrderUserInfo WITH (TABLOCKX)
set @sql=’select @b=ID from tb_EbayOrderUserInfo where ‘+ convert(varchar(8000),@ebayuserwhere)
exec sp_executesql @sql,N’@b int output’,@ebayuid output
set @ebayuid =ISNULL(@ebayuid,0)
if(@ebayuid>0)
begin
set @execebaysql=@ebaysql–存在ebayuid
set @execebaysql= REPLACE(@execebaysql,’@ebayuid’,”+convert(varchar,@ebayuid)+”)–必须替换 否则会报错误说必须声明标量变量
end
else
begin
set @execebaysql=@ebayusersql+@ebaysql –不存在ebayuid
end
set @execebaysql= REPLACE(@execebaysql,’@00′,dbo.GetOrderNum(@ebaystockflag))–调用函数替换订单编号
exec (@execebaysql)
end
exec(@execsql)
end try
begin catch
if(@@TRANCOUNT>0)
rollback transaction mytrans
end catch
if(@@TRANCOUNT>0)
begin
commit transaction mytrans
end
else begin
rollback transaction mytrans
end