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本主題尚未接受評分 - 為這個主題評分

@@CURSOR_ROWS (Transact-SQL)

SQL Server 2005

傳回在連接所開啟的最後一個資料指標中，目前符合的資料列數。為了改進效能，Microsoft SQL Server 可以非同步地擴展大型索引鍵集和靜態資料指標。您可以呼叫 @@CURSOR_ROWS 來決定在呼叫 @@CURSOR_ROWS 時擷取資料指標適用的資料列數目。

主題連結圖示 Transact-SQL 語法慣例

複製 

@@CURSOR_ROWS

integer

傳回值 描述

-m

非同步地擴展資料指標。傳回的值 (-m) 是目前在索引鍵集中的資料列數。

-1

資料指標是動態的。由於動態資料指標會反映所有變更，因此，資料指標之符合的資料列數會不斷改變。永遠不可能明確指出已擷取了所有符合的資料列。

0

未開啟任何資料列、最後開啟的資料指標沒有適合的資料列，或最後開啟的資料指標已關閉或取消配置。

n

已充分擴展資料指標。傳回的值 (n) 是資料指標中的總資料列數。

如果非同步地開啟最後一個資料指標，@@CURSOR_ROWS 傳回的數字便是負數。如果 sp_configure cursor threshold 的值大於 0，且資料指標結果集中的資料列數大於資料指標臨界值，便非同步地開啟索引鍵集驅動程式或靜態資料指標。

這個範例會宣告一個資料指標，並利用 SELECT 來顯示 @@CURSOR_ROWS 的值。在資料指標開啟之前，這個設定值是 0，-1 值表示非同步地擴展資料指標索引鍵集。

複製 
USE AdventureWorks;
GO
SELECT @@CURSOR_ROWS;
DECLARE Name_Cursor CURSOR FOR
SELECT LastName ,@@CURSOR_ROWS FROM Person.Contact;
OPEN Name_Cursor;
FETCH NEXT FROM Name_Cursor;
SELECT @@CURSOR_ROWS;
CLOSE Name_Cursor;
DEALLOCATE Name_Cursor;
GO

結果集如下：

複製 
-----------
0          

LastName       
---------------
Achong          

           
-----------
-1
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