T-SQL大师,是什么导致以下过程返回此错误"函数中包含的Select语句无法向客户端返回数据"?
create function dbo.func_get_times_for_stop(@stopId as varchar(5))
returns varchar(max) as
begin
declare @arrival_times varchar(max)
set @arrival_times = '';
declare @arrival_time varchar(5)
declare arrival_cursor cursor for
select arrival from schedules where stopid=@stopId;
open arrival_cursor;
fetch next from arrival_cursor;
while @@fetch_status = 0
begin
fetch next from arrival_cursor into @arrival_time;
set @arrival_times += ',' + @arrival_time;
end;
close arrival_cursor;
deallocate arrival_cursor;
return @arrival_times;
end;
我只是想返回一个标量,它包括从到达时间连接的字符串。我看不出在哪里返回select语句。
会是这行吗?
fetch next from arrival_cursor;
它应该正在获取@arrival_time
。
此处:
fetch next from arrival_cursor;
你需要
fetch next from arrival_cursor into @arrival_time;