1 USE [NC]
 2 GO
 3 /****** Object:  UserDefinedFunction [dbo].[dict_url_channel]    Script Date: 2019/5/25 16:40:17 ******/
 4 SET ANSI_NULLS ON
 5 GO
 6 SET QUOTED_IDENTIFIER ON
 7 GO
 8 ALTER function [dbo].[dict_url_channel]
 9 (
10     @url varchar(MAX)                      --传入参数
11 )
12 returns varchar(50)                      --返回参数类型
13 as
14 begin
15     declare @channel nvarchar(50)                --定义变量
16     declare @temp varchar(250)
17     declare @charindex int                         
18     declare key_url_cursor cursor local              --定义游标
19     for select key_url  from Information.dbo.url_to_渠道  order by seq           --按照seq 遍历Information.dbo.url_to_渠道
20     open key_url_cursor                            --打开游标
21     fetch next from key_url_cursor into @temp      ----获取key_cursor的下一条数据，其中为字段赋值@temp     
22     while @@FETCH_STATUS = 0
23         begin
24             select @charindex = CHARINDEX(@temp,@url)  --判断@temp是否在@url中
25             if @charindex > 0
26                 begin
27                     select @channel = value_渠道  from Information .dbo.url_to_渠道 where key_url  = @temp;                    
28                     break;
29                 end
30             fetch next from key_url_cursor into @temp
31         end
32     close key_url_cursor                   --关闭游标
33     deallocate key_url_cursor              --释放游标
34     if @channel is null
35         begin
36             select @channel=''
37         end
38     return @channel
39 end