PHP:如果调用提供结果的存储过程后再次使用mysqli :: query()，则“命令不同步" [英] PHP: «Commands out of sync» if I mysqli::query() again after a call to a results-giving stored procedure

问题描述

我的数据库中有一个存储过程，该存储过程返回表中的所有记录:

I have a stored procedure in my db that returns all records in a table:

CREATE PROCEDURE showAll()
BEGIN
    SELECT * FROM myTable;
END

SP可以按预期工作.但是，如果我在php脚本中调用它，然后尝试再次查询数据库，则它总是失败:

The SP works just as expected. But, if I call it in a php script and then I try to query the database again, it always fail:

// $mysqli is a db connection

// first query:

if (!$t = $mysqli->query("call showAll()"))
    die('Error in the 1st query');

while ($r = $t->fetch_row()) {
    echo $r[0] . "<br>"; // this is ok
}

$t->free(); // EDIT (this doesn't help anyway)

// second query (does the same thing):

if (!$t = $mysqli->query("SELECT * from myTable"))
    die('Error in the 2nd query'); // I always get this error

while ($r = $t->fetch_row()) {
    echo $r[0] . "<br>";
}

值得注意的是，如果我交换了两个查询(即，我在最后调用了存储过程)，则它可以正常工作而没有任何错误.在第二个查询之前关闭close()结果无济于事. 一些提示吗?

Notable, if I swap the two queries (i.e. I call the stored procedure at the end) it works without any error. To close() the result before the second query doesn't help. Some hints?

mysqli :: error()是:«命令不同步；您不能立即运行此命令».

mysqli::error() is: «Commands out of sync; you can't run this command now».

推荐答案

关于phpinet/mysqli.query的手动条目的注释已更新，现在包括有关此问题的答案.总而言之，在$ t-> close()之后调用$ mysqli-> next_result().恭喜petrus.jvr！

The comments on the php.net/manual entry for mysqli.query have been updated, and now include an answer for this. To summarize, call $mysqli->next_result() after $t->close(). Kudos to petrus.jvr!

链接: http://www.php.net/manual/zh/mysqli.query.php#102904

这篇关于PHP:如果调用提供结果的存储过程后再次使用mysqli :: query()，则“命令不同步"的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！