Question

我一直在尝试使用PDO从存储过程中获取结果集，但是当前对数据库进行多次调用时会出现错误

SQLSTATE[HY000]: General error: 2014 Cannot execute queries while other unbuffered queries are active. Consider using PDOStatement::fetchAll(). Alternatively, if your code is only ever going to run against mysql, you may enable query buffering by setting the PDO::MYSQL_ATTR_USE_BUFFERED_QUERY attribute

代码：

$table = $data["TABLE_NAME"];// this returns table names like table_1,table_2
$exc = $conn->prepare("CALL Dummy_2('$table')");
$exc->execute();

while($finalRes = $exc->fetch(PDO::FETCH_ASSOC)) {
    $ID = substr($table,11);
    $exc2 = $conn->prepare("CALL sp_new('$ID')");
    $exc2->execute();// the place which triggers the error

    if(false !== $result) {
        $totals = array();
        while($row = $exc2->fetch(PDO::FETCH_ASSOC)) {
            $tot = new stdClass();
            $tot->count = (int)$row['cnt'];
            $tot->ucount = (int)$row['ucnt'];
            $tot->date = new DateTime($row['dat']);
            $totals[] = $tot;
        }

        var_dump($tot);
    }
}

Answer 1

您正在尝试第二个预备语句（$exc2），而同一连接上已有一个语句正在进行中。与警告建议一样，尝试使用fetchAll并循环返回数据，而不是一次一行地获取行 - 这样，您可以在开始第二个语句之前关闭第一个语句。

示例

我没有时间测试它，但您可以尝试以下方法。我已更改第4-5行（$dataset和foreach）。

$table = $data["TABLE_NAME"];// this returns table names like table_1,table_2 $exc = $conn->prepare("CALL Dummy_2('$table')"); $exc->execute(); $dataset = $ex->fetchAll(); foreach($dataset AS $finalRes) { $ID = substr($table,11); $exc2 = $conn->prepare("CALL sp_new('$ID')"); $exc2->execute();// the place which triggers the error if(false !== $result) { $totals = array(); while($row = $exc2->fetch(PDO::FETCH_ASSOC)) { $tot = new stdClass(); $tot->count = (int)$row['cnt']; $tot->ucount = (int)$row['ucnt']; $tot->date = new DateTime($row['dat']); $totals[] = $tot; } var_dump($tot); } }

当其他无缓冲的查询是活动的PDO PHP时，无法执行查询

1 个答案: