SQLSERVER存储过程返回游标的处理
1. 存储过程返回游标
USE [TEST_DB]
GO
/****** [PRT].[Move_Data_Return_Cursor] Script Date: 03/08/2012 17:38:55 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*********************************************************************************
*把数据从表 DATA_SOURCE_TABLE 移动到表 TEST_TABLE .
返回游标供Move_Data_Handle_Cursor供Move_Data_Handle_Cursor存储过程使用.
*DataServer: 110.110.110.110
*DataBase: TEST_DB
*Name: [Move_Data_Return_Cursor]
*Function:
*Input: @overTimeHour INT
*Output: @CURSOR_PriceChangeRecord CURSOR
*Creator: GREATWQS 2012-02-23
*Updated: GREATWQS 2012-03-08 UPDATE NEW REQUIREMENT
**********************************************************************************/
ALTER PROCEDURE [PRT].[Move_Data_Return_Cursor]
-- Add the parameters for the stored procedure here
@overTimeHour INT,
@CURSOR_PriceChangeRecord CURSOR VARYING OUTPUT
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
-- print @overTimeHour;
-- 1. 声明游标: DECLARE CURSOR_PriceChangeRecord
SET @CURSOR_PriceChangeRecord = CURSOR
FORWARD_ONLY STATIC
FOR
SELECT ItemNo,
ItemName,
ItemColor,
ItemSize,
ItemMadeIn,
InDate
FROM PRT.DATA_SOURCE_TABLE WITH(NOLOCK)
WHERE InDate > dateadd(HOUR, -@overTimeHour, getdate())
-- 在这里进行时间的限定.
-- 2. 打开游标
OPEN @CURSOR_PriceChangeRecord
END
2. 存储过程处理返回游标
USE [TEST_DB]
GO
/****** [PRT].[Move_Data_RHandle_Cursor] Script Date: 03/08/2012 17:39:27 ******/
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
/*********************************************************************************
*把数据从表 DATA_SOURCE_TABLE 移动到表 TEST_TABLE
*把游标中的数据,插入到表TEST_TABLE.
*DataServer: 110.110.110.110
*DataBase: TEST_DB
*Name: [Move_Data_Handle_Cursor]
*Function:
*Input: @overTimeHour INT
*Output:
*Creator: GREATWQS 2012-02-23
*Updated: GREATWQS 2012-03-08 UPDATE NEW REQUIREMENT
**********************************************************************************/
ALTER PROCEDURE [PRT].[Move_Data_Handle_Cursor]
-- 超时时间(小时)
@overTimeHour INT
AS
BEGIN
-- SET NOCOUNT ON added to prevent extra result sets from
-- interfering with SELECT statements.
SET NOCOUNT ON;
DECLARE
-- 需要插入表TEST_TABLE,数据来源声明
@ItemNumber_Insert CHAR(20),
@ItemName_Insert CHAR(50),
@ItemColor_Insert CHAR(10),
@ItemSize_Insert CHAR(5),
@ItemWhereMadeIn_Insert CHAR(20),
@createTime_Insert DATETIME,
@changeTime_Insert DATETIME,
@lastChangeTime_Insert DATETIME,
@priority_Insert INT,
@itemType_Insert INT,
@active_Insert INT,
-- ItemNumber Record num in table
@totalNum_SelectDB INT,
@changeTime_SelectDB DATETIME
-- Set Default Value
SET @ItemWhereMadeIn_Insert = 0
SET @createTime_Insert = getdate()
SET @lastChangeTime_Insert = null
SET @priority_Insert = 0
SET @itemType_Insert = 0
SET @active_Insert = 1
-- 1. 声明游标: 在过程内部自己定义有游标时,调用游标前面不加@符号
DECLARE @CURSOR_Result CURSOR
-- 2. 得到上个游标, 上个游标已经打开
EXEC Move_Data_Return_Cursor @overTimeHour,
@CURSOR_PriceChangeRecord = @CURSOR_Result OUTPUT
-- 3. 抓取游标中的数据: FETCH CURSOR_Result
FETCH NEXT FROM @CURSOR_Result
INTO @ItemNumber_Insert,
@ItemName_Insert,
@ItemColor_Insert,
@ItemSize_Insert,
@changeTime_Insert
-- 4. 对游标中的每一个记录进行处理: 循环
WHILE (@@FETCH_STATUS = 0)
BEGIN
-- 查看此ItemNumber_Insert是否已经存在表中
SELECT TOP 1 @totalNum_SelectDB = COUNT(*)
FROM PRT.TEST_TABLE WITH(NOLOCK)
WHERE ItemNumber = @ItemNumber_Insert
-- 如果表不存在此@ItemNumber_Insert, 则插入
IF @totalNum_SelectDB = 0
BEGIN
INSERT INTO PRT.TEST_TABLE(
[ItemNumber],
[ItemName],
[ItemColor],
[ItemSize],
[MadeIn],
[createTime],
[changeTime],
[lastChangeTime],
[priority],
[itemType],
[active])
VALUES (
@ItemNumber_Insert,
@ItemName_Insert,
@ItemColor_Insert,
@ItemSize_Insert,
@ItemWhereMadeIn_Insert,
@createTime_Insert,
@changeTime_Insert,
@lastChangeTime_Insert,
@priority_Insert,
@itemType_Insert,
@active_Insert
)
END
-- 如果此ItemNumber存在于表中
ELSE
BEGIN
-- 查看此ItemNumber_Insert的记录
SELECT TOP 1 @changeTime_SelectDB = changeTime
FROM PRT.TEST_TABLE WITH(NOLOCK)
WHERE ItemNumber = @ItemNumber_Insert
-- If item has exists in table, and changeTime<=newItem.changeTime
-- fresh the changeTime = newItem.changeTime, set active=1;
IF @changeTime_SelectDB < @changeTime_Insert
BEGIN
UPDATE PRT.TEST_TABLE
SET changeTime = @changeTime_Insert,
active = 1
WHERE ItemNumber = @ItemNumber_Insert
END
END
-- FETCH NEXT RECORD FROM @CURSOR_Result
FETCH NEXT FROM @CURSOR_Result
INTO @ItemNumber_Insert,
@ItemName_Insert,
@ItemColor_Insert,
@ItemSize_Insert,
@changeTime_Insert
END
-- 5. 关闭游标
CLOSE @CURSOR_Result
-- 6. 删除游标
DEALLOCATE @CURSOR_Result
-- Delete overtime item, set active=0：changeTime