我有PHP/PDO和MySQLPHP PDO返回的SELECT FOUND_ROWS不一致的結果()
一個問題,當我運行一個查詢與SQL_CALC_FOUND_ROWS,然後選擇FOUND_ROWS(),其返回0,80%的時間,而其餘的時間FOUND_ROWS是準確的
我已經減少到一個簡單的測試循環,但是這對我的開發服務器正常工作,但在生產測試用例有不一致的問題。
從MySQL命令行運行相同的查詢工作正常,即使在生產,所以它似乎是一個PHP/PDO問題
PHP 5.5.28 - 使用mysqlnd 5.0.11-dev的 Percona的服務器25年6月5日-73.1-登錄CentOS 6.6(最終)
任何人都可以幫忙嗎?我試過了我能想到的所有東西,並且我正在撕掉我的頭髮
<?php
require_once "../consts.php";
$nolimit_query = "select SQL_CALC_FOUND_ROWS targetusers.u_id
FROM
users targetusers
LEFT JOIN user_extra targetuserextra ON (targetuserextra.ue_userid = targetusers.u_id)
LEFT JOIN countries ON (c_id = targetusers.u_country)
LEFT JOIN cities ON (cities.ct_countryid = c_id and cities.ct_id = targetusers.u_city)
LEFT JOIN userimages ON (targetusers.u_primaryimage = userimages.ui_id and userimages.ui_userid = targetusers.u_id and userimages.ui_imagetype = 'P')
WHERE
(targetusers.u_deleted = 0) and
(targetusers.u_id NOT IN (19, 32, 115)) and
(targetusers.u_active = 1) and
(targetusers.u_confirmed=5) order by u_lastupdated DESC LIMIT 10, 10";
// already tried this soln suggested elsewhere -- defaults to off for my PHP anyway though
ini_set("mysql.trace_mode", 0);
ini_set("display_errors", 1);
// set up PDO connection
$dbh = new PDO(
"mysql:host=" . Config::Get()->DB_SERVER . ";dbname=" . Config::Get()->DATABASE_NAME . ";charset=utf8",
Config::Get()->DB_USERNAME,
Config::Get()->DB_PASSWORD
);
$dbh->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$dbh->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$dbh->setAttribute(PDO::ATTR_PERSISTENT, false);
echo $dbh->getAttribute(PDO::ATTR_CLIENT_VERSION) . "<br>";
echo $dbh->getAttribute(PDO::ATTR_DRIVER_NAME) . "<br>";
echo $dbh->getAttribute(PDO::ATTR_SERVER_INFO) . "<br>";
echo $dbh->getAttribute(PDO::ATTR_SERVER_VERSION) . "<br><br>";
echo date("r") . "<br>";
for ($i=0; $i<5; $i++)
{
// run query above
$stmt = $dbh->prepare($nolimit_query);
if ($stmt === FALSE)
{
die($stmt->errorInfo());
}
// get result set
if (($result = $stmt->execute()) === TRUE)
{
$a = $stmt->fetchAll(PDO::FETCH_ASSOC);
$stmt->closeCursor();
$stmt = NULL;
// this query returns inconsistent results (80% of the time it returns 0!)
$b = $dbh->query("SELECT FOUND_ROWS() as cnt")->fetch(PDO::FETCH_ASSOC);
echo "FOUND ROWS = " . $b["cnt"] . "<br>";
}
}
此腳本的輸出如下。
請注意,只有2 5環路返回爲FOUND_ROWS正確的值,與其他3回來爲0
mysqlnd 5.0.11-dev - 20120503 - $Id: 15d5c781cfcad91193dceae1d2cdd127674ddb3e $
mysql
Uptime: 1857223 Threads: 1 Questions: 4446069 Slow queries: 32 Opens: 465 Flush tables: 1 Open tables: 403 Queries per second avg: 2.393
5.6.25-73.1
Fri, 04 Sep 2015 12:01:10 +0100
FOUND ROWS = 0
FOUND ROWS = 0
FOUND ROWS = 59836
FOUND ROWS = 0
FOUND ROWS = 59836
只是一個小點,你設置errormode to Exception但是你沒有在try/catch塊中運行db代碼 – RiggsFolly
你也在不需要的循環內準備一個語句 – RiggsFolly
你正在做的一切都是正確的,因爲[使用try catch來獲取基本錯誤報告只是一個妄想](http://phpdelusions.net/try-catch) –