/**/
/*=======================================================================
功能: 对传进来的查询SQL进行分页后返回指定页数据, 不管查询多少页,其查询性能只受 @SqlStr 自身性能的影响,有时还要快
参数: @SqlStr 需要执行的查询语句
@PrimaryKey 参数@SqlStr返回列中具有唯一确定性的字段名,不能有表别名前缀
@OrdrStr 参数@SqlStr返回列中存的字段,用于排序,不能有表别名前缀
@CurrPageNo 需要返回的页数
@PageSize 每页行数
@TotalNum 当传进来为 -1 时,返回符合条件的总行数
author: 杨连山
date: 2008-01-25
测试代码:
SELECT GETDATE()
DECLARE
@SqlStr VARCHAR(8000),
@CurrPageNo INT,
@PageSize INT,
@TotalNum INT
SET @SqlStr =
'SELECT *
FROM PROD_PRODUCT WITH(NOLOCK)
WHERE CONTAINS(ProductName, ''手机'')'
SET @CurrPageNo = 700
SET @PageSize = 20
SET @TotalNum = -1
EXEC COMMON_PROCEDURE_QueryWithPage @SqlStr, 'ProductPKId', 'UpdateDateTime', @CurrPageNo, 20, @TotalNum output
SELECT @TotalNum, GETDATE()
=========================================================================*/
IF
EXISTS
(
SELECT
*
FROM
sysobjects
WHERE
name
=
'
COMMON_PROCEDURE_QueryWithPage
'
AND
type
=
'
P
'
)
DROP
PROC
COMMON_PROCEDURE_QueryWithPage
GO
CREATE
PROC
COMMON_PROCEDURE_QueryWithPage
(
@SqlStr
VARCHAR
(
5000
),
@PrimaryKey
VARCHAR
(
100
),
@OrderStr
VARCHAR
(
500
),
@CurrPageNo
INT
,
@PageSize
INT
,
@TotalNum
INT
OUTPUT
)
AS
DECLARE
@ExeSql
VARCHAR
(
8000
)
SET
NOCOUNT
ON
IF
@TotalNum
=
-
1
CREATE
TABLE
#Table_Count(TotalNum
INT
)
SET
@ExeSql
=
'
SELECT IDENTITY(INT) AS RowIndex, A.
'
+
@PrimaryKey
+
CHAR
(
10
)
+
'
INTO #Table_Data
FROM (
'
+
@SqlStr
+
'
) AS A
'
IF
@OrderStr
<>
''
BEGIN
SET
@ExeSql
=
@ExeSql
+
CHAR
(
10
)
+
'
ORDER BY
'
+
@OrderStr
END
IF
@TotalNum
=
-
1
BEGIN
SET
@ExeSql
=
@ExeSql
+
CHAR
(
10
)
+
CHAR
(
10
)
+
'
INSERT INTO #Table_Count VALUES(ISNULL(SCOPE_IDENTITY(), 0))
'
END
SET
@ExeSql
=
@ExeSql
+
CHAR
(
10
)
+
CHAR
(
10
)
+
'
SELECT *
FROM (
'
+
@SqlStr
+
'
) AS A
WHERE A.
'
+
@PrimaryKey
+
'
IN(SELECT
'
+
@PrimaryKey
+
'
FROM #Table_Data WHERE RowIndex BETWEEN
'
+
CONVERT
(
VARCHAR
, (
@CurrPageNo
-
1
)
*
@PageSize
+
1
)
+
'
AND
'
+
CONVERT
(
VARCHAR
,
@CurrPageNo
*
@PageSize
)
+
'
)
'
IF
@OrderStr
<>
''
BEGIN
SET
@ExeSql
=
@ExeSql
+
CHAR
(
10
)
+
'
ORDER BY
'
+
@OrderStr
END
EXEC
(
@ExeSql
)
IF
@TotalNum
=
-
1
BEGIN
SELECT
@TotalNum
=
Totalnum
FROM
#Table_Count
DROP
TABLE
#Table_Count
IF
@TotalNum
IS
NULL
SET
@TotalNum
=
-
1
END
RETURN
GO
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