sqlsrv_next_result
使指定语句的下一个结果(结果集、行计数或输出参数)处于活动状态。
注意
大容量查询或存储过程返回的第一个(或唯一)结果处于活动状态,并且不调用 sqlsrv_next_result。
语法
sqlsrv_next_result( resource $stmt )
参数
$stmt:使下一个结果处于活动状态的执行语句。
返回值
如果下一个结果成功进入活动状态,将返回布尔值 true 。 如果在使下一个结果处于活动状态时发生错误,将返回 false 。 如果没有更多可用结果,将返回 NULL 。
示例 1
以下示例创建和执行将产品评论插入 Production.ProductReview 表的存储过程,然后选择指定产品的所有评论。 执行存储过程后,无需调用 sqlsrv_next_result 即可使用第一个结果(存储过程中受 INSERT 查询影响的行数)。 通过调用 sqlsrv_next_result 可获取下一个结果(存储过程中 SELECT 查询返回的行),并可通过 sqlsrv_fetch_array 使用该结果。
注意
建议使用规范语法来调用存储过程。 有关规范语法的详细信息,请参阅调用存储过程。
该示例假定已在本地计算机上安装了 SQL Server 和 AdventureWorks 数据库。 从命令行运行该示例时,所有输出都将写入控制台。
<?php
/* Connect to the local server using Windows Authentication and
specify the AdventureWorks database as the database in use. */
$serverName = "(local)";
$connectionInfo = array( "Database"=>"AdventureWorks");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn === false )
{
echo "Could not connect.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Drop the stored procedure if it already exists. */
$tsql_dropSP = "IF OBJECT_ID('InsertProductReview', 'P') IS NOT NULL
DROP PROCEDURE InsertProductReview";
$stmt1 = sqlsrv_query( $conn, $tsql_dropSP);
if( $stmt1 === false )
{
echo "Error in executing statement 1.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Create the stored procedure. */
$tsql_createSP = " CREATE PROCEDURE InsertProductReview
@ProductID int,
@ReviewerName nvarchar(50),
@ReviewDate datetime,
@EmailAddress nvarchar(50),
@Rating int,
@Comments nvarchar(3850)
AS
BEGIN
INSERT INTO Production.ProductReview
(ProductID,
ReviewerName,
ReviewDate,
EmailAddress,
Rating,
Comments)
VALUES
(@ProductID,
@ReviewerName,
@ReviewDate,
@EmailAddress,
@Rating,
@Comments);
SELECT * FROM Production.ProductReview
WHERE ProductID = @ProductID;
END";
$stmt2 = sqlsrv_query( $conn, $tsql_createSP);
if( $stmt2 === false)
{
echo "Error in executing statement 2.\n";
die( print_r( sqlsrv_errors(), true));
}
/*-------- The next few steps call the stored procedure. --------*/
/* Define the Transact-SQL query. Use question marks (?) in place of the
parameters to be passed to the stored procedure */
$tsql_callSP = "{call InsertProductReview(?, ?, ?, ?, ?, ?)}";
/* Define the parameter array. */
$productID = 709;
$reviewerName = "Customer Name";
$reviewDate = "2008-02-12";
$emailAddress = "customer@email.com";
$rating = 3;
$comments = "[Insert comments here.]";
$params = array(
$productID,
$reviewerName,
$reviewDate,
$emailAddress,
$rating,
$comments
);
/* Execute the query. */
$stmt3 = sqlsrv_query( $conn, $tsql_callSP, $params);
if( $stmt3 === false)
{
echo "Error in executing statement 3.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Consume the first result (rows affected by INSERT query in the
stored procedure) without calling sqlsrv_next_result. */
echo "Rows affected: ".sqlsrv_rows_affected($stmt3)."-----\n";
/* Move to the next result and display results. */
$next_result = sqlsrv_next_result($stmt3);
if( $next_result )
{
echo "\nReview information for product ID ".$productID.".---\n";
while( $row = sqlsrv_fetch_array( $stmt3, SQLSRV_FETCH_ASSOC))
{
echo "ReviewerName: ".$row['ReviewerName']."\n";
echo "ReviewDate: ".date_format($row['ReviewDate'],
"M j, Y")."\n";
echo "EmailAddress: ".$row['EmailAddress']."\n";
echo "Rating: ".$row['Rating']."\n\n";
}
}
elseif( is_null($next_result))
{
echo "No more results.\n";
}
else
{
echo "Error in moving to next result.\n";
die(print_r(sqlsrv_errors(), true));
}
/* Free statement and connection resources. */
sqlsrv_free_stmt( $stmt1 );
sqlsrv_free_stmt( $stmt2 );
sqlsrv_free_stmt( $stmt3 );
sqlsrv_close( $conn );
?>
在执行具有输出参数的存储过程时,建议在使用其他所有结果后再访问输出参数的值。 有关详细信息,请参阅 如何:使用 SQLSRV 驱动程序指定参数方向。
示例 2
以下示例执行大容量查询,即检索指定产品 ID 的产品评论信息、插入产品评论,然后再次检索指定产品 ID 的产品评论信息。 新插入的产品评论将包括在大容量查询的最终结果集中。 该示例使用 sqlsrv_next_result 从大容量查询的一个结果移动到下一个结果。
注意
大容量查询或存储过程返回的第一个(或唯一)结果处于活动状态,并且不调用 sqlsrv_next_result。
该示例使用 AdventureWorks 数据库的 Purchasing.ProductReview 表,并且假定已在服务器上安装了此数据库。 从命令行运行该示例时,所有输出都将写入控制台。
<?php
/* Connect to the local server using Windows Authentication and
specify the AdventureWorks database as the database in use. */
$serverName = "(local)";
$connectionInfo = array( "Database"=>"AdventureWorks");
$conn = sqlsrv_connect( $serverName, $connectionInfo);
if( $conn === false )
{
echo "Could not connect.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Define the batch query. */
$tsql = "--Query 1
SELECT ProductID, ReviewerName, Rating
FROM Production.ProductReview
WHERE ProductID=?;
--Query 2
INSERT INTO Production.ProductReview (ProductID,
ReviewerName,
ReviewDate,
EmailAddress,
Rating)
VALUES (?, ?, ?, ?, ?);
--Query 3
SELECT ProductID, ReviewerName, Rating
FROM Production.ProductReview
WHERE ProductID=?;";
/* Assign parameter values and execute the query. */
$params = array(798,
798,
'CustomerName',
'2008-4-15',
'test@customer.com',
3,
798 );
$stmt = sqlsrv_query($conn, $tsql, $params);
if( $stmt === false )
{
echo "Error in statement execution.\n";
die( print_r( sqlsrv_errors(), true));
}
/* Retrieve and display the first result. */
echo "Query 1 result:\n";
while( $row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_NUMERIC ))
{
print_r($row);
}
/* Move to the next result of the batch query. */
sqlsrv_next_result($stmt);
/* Display the result of the second query. */
echo "Query 2 result:\n";
echo "Rows Affected: ".sqlsrv_rows_affected($stmt)."\n";
/* Move to the next result of the batch query. */
sqlsrv_next_result($stmt);
/* Retrieve and display the third result. */
echo "Query 3 result:\n";
while( $row = sqlsrv_fetch_array( $stmt, SQLSRV_FETCH_NUMERIC ))
{
print_r($row);
}
/* Free statement and connection resources. */
sqlsrv_free_stmt( $stmt );
sqlsrv_close( $conn );
?>