Question

当我尝试在ASP页面上运行更高级的SQL查询时，我收到此错误：

关闭对象时不允许
操作

当我运行此代码时，它正在运行：

...
sql = "SELECT distinct team FROM tbl_teams"
rs.open sql, conndbs, 1, 1
...

但是，当我运行此代码时（如果我在Microsoft SQL Server Management Studio中运行此代码，则此代码正常工作），我收到错误...

...
sql = "DECLARE     @cols AS NVARCHAR(MAX),     @query  AS NVARCHAR(MAX),     @orderby nvarchar(max),     @currentYear varchar(4)  select @currentYear = cast(year(getdate()) as varchar(4))  select @cols   = STUFF((SELECT  ',' + QUOTENAME(year([datefrom]))            from tbl_teams            group by year([datefrom])            order by year([datefrom]) desc             FOR XML PATH(''), TYPE             ).value('.', 'NVARCHAR(MAX)')         ,1,1,'')  select @orderby = 'ORDER BY ['+cast(year(getdate()) as varchar(4)) + '] desc'  set @query = 'SELECT team, Won = [1],                 Lost=[2], Draw = [3]' + @cols + ', Total             from             (               select                 team,                 new_col,                 total                from               (                 select team,                   dt = year([datefrom]),                   result,                   total = count(*) over(partition by team)                 from tbl_teams               ) d               cross apply               (                 select ''dt'', dt union all                 select ''result'', case when dt = '+@currentYear+' then result end               ) c (old_col_name, new_col)             ) x             pivot             (                 count(new_col)                 for new_col in ([1], [2], [3],' + @cols + ')             ) p '+ @orderby  exec sp_executesql @query"
rs.open sql, conndbs, 1, 1
...

这是对查询的更好概述：

DECLARE 
    @cols AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX),
    @orderby nvarchar(max),
    @currentYear varchar(4)

select @currentYear = cast(year(getdate()) as varchar(4))

select @cols 
  = STUFF((SELECT  ',' + QUOTENAME(year([datefrom])) 
           from tbl_teams
           group by year([datefrom])
           order by year([datefrom]) desc
            FOR XML PATH(''), TYPE
            ).value('.', 'NVARCHAR(MAX)') 
        ,1,1,'')

select @orderby = 'ORDER BY ['+cast(year(getdate()) as varchar(4)) + '] desc'

set @query = 'SELECT team, Won = [1], 
                Lost=[2], Draw = [3]' + @cols + ', Total
            from 
            (
              select 
                team,
                new_col,
                total  
              from
              (
                select team, 
                  dt = year([datefrom]),
                  result,
                  total = count(*) over(partition by team)
                from tbl_teams
              ) d
              cross apply
              (
                select ''dt'', dt union all
                select ''result'', case when dt = '+@currentYear+' then result end
              ) c (old_col_name, new_col)
            ) x
            pivot 
            (
                count(new_col)
                for new_col in ([1], [2], [3],' + @cols + ')
            ) p '+ @orderby

exec sp_executesql @query

我是否需要以其他方式运行查询或此代码有什么问题？

Answer 1

在将ADODB与SQL Server一起使用时，行计数被解释为存储过程的输出会导致这是一个常见问题。

为避免这种情况，请记住设置

SET NOCOUNT ON;

在您的存储过程中，这将阻止ADODB返回已关闭的记录集，或者由于某种原因您不想这样做（不知道为什么，因为您始终可以使用@@ROWCOUNT来传递行数（）），你可以使用

'Return the next recordset, which will be the result of the Stored Procedure, not 
'the row count generated when SET NOCOUNT OFF (default).
Set rs = rs.NextRecordset()

如果ADODB检测到存储过程返回了一个{p>，则返回下一个ADODB.Recordset（在处理多个ADODB.Recordset对象时最好检查rs.State <> adStateClosed。）

在运行更高级的查询时关闭对象时不允许操作

1 个答案: