if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[getEPnum]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[getEPnum]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[getstrcount]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[getstrcount]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[getstrofindex]') and xtype in (N'FN', N'IF', N'TF'))
drop function [dbo].[getstrofindex]
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
－－－ 這個函數直接調用了另外的兩個函數，可以先閱讀下面提到的兩個函數
CREATE function getEPnum (@str varchar(8000))
returns varchar(8000)
as
begin
declare @str_return varchar(8000)
declare @i int
declare @temp_i int
declare @onlineornot int
declare @findepnumok int
-- 用來取得一個epnum，
-- 規則：首先從chatid中取，如果有在線得，則取得最前面得在線得返回
-- 如果全部不在線，則返回 ‘00000000’
select @findepnumok = 0
select @temp_i = 0
IF len(@str)<=0
begin
SELECT @str_return = '00000000'
end
else
begin
select @i = dbo.getstrcount(@str,',')
WHILE @temp_i<@i
BEGIN
select @onlineornot = online from wwchat_user where epnum=dbo.getstrofindex(@str,',',@temp_i)
IF (@onlineornot=1)
begin
select @str_return =dbo.getstrofindex(@str,',',@temp_i)
select @findepnumok = 1 --找到epnum後置為1
BREAK
end
ELSE
begin
select @temp_i = @temp_i + 1
select @findepnumok = 0 --找不到epnum後置為1
end
END
if @findepnumok = 0
begin
SELECT @str_return = '00000000'
end
end
return @str_return
end
GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS ON
GO
