問題描述

我在 homestead 虛擬機 (vagrant) 中使用最新版本的 laravel (5.1).

我將我的項目連接到本地 mariaDB 服務器，其中有一些表和 2 個 db-view.

因為我只在 db-view 表上做了一些選擇，所以我隨機收到這個錯誤:

一般錯誤:1615 Prepared statement需要重新準備

從今天開始，僅在 db 視圖上進行選擇時，我總是會收到此錯誤.如果我打開我的 phpMyAdmin 并進行相同的選擇，它會返回正確的結果.

我嘗試打開 php artisan tinker 并選擇 db-view 的一條記錄，但它返回相同的錯誤:

//從用戶表中選擇一個用戶>>>$user = 新應用用戶=><應用用戶#000000006dc32a890000000129f667d2>{}>>>$user = AppUser::find(1);=><應用用戶#000000006dc32a9e0000000129f667d2>{編號:1，name: "盧卡",電子郵件:luca@email.it"，客戶 ID:1，created_at: "2015-08-06 04:17:57",更新時間:2015-08-11 12:39:01"}>>>//從 Source db-view 中選擇一個源>>>$source = 新 AppSource=><AppSource #000000006dc32a820000000129f667d2>{}>>>$source = AppSource::find(1);IlluminateDatabaseQueryException 帶有消息SQLSTATE[HY000]:一般錯誤:1615 準備好的語句需要重新準備(SQL:select * from `sources` where `sources`.`id` = 1 limit 1)'

我該如何解決?我讀到了 mysqldump 的一個問題(但不是我的情況)并增加了 table_definition_cache 的值，但不確定它是否會起作用，我無法修改它們.

這是一種 Laravel 錯誤嗎?

我怎樣才能弄清楚?

按照要求，我添加了我的模型源代碼.源代碼:

hasMany("AppCustomerSource", "sourceId", "id");}/**** @return [類型] [說明]*/公共功能問題(){return $this->hasMany("AppIssue", "sourceId", "id");}}

<小時>

編輯 2:

如果我在項目中使用 mysqli 執行相同的查詢，它會起作用:

$db = new mysqli(getenv('DB_HOST'), getenv('DB_USERNAME'), getenv('DB_PASSWORD'), getenv('DB_DATABASE'));if($db->connect_errno>0){dd('無法連接到數據庫 [' . $db->connect_error . ']');}$sql = "SELECT * FROM `sources` WHERE `id` = 4";if(!$result = $db->query($sql)){dd('運行查詢時出錯 [' . $db->e??rror . ']');}dd($result->fetch_assoc());

<小時>

編輯 3:2個月后，我還在那里.同樣的錯誤，沒有找到解決方案.我決定在 aritsan tinker 中嘗試一些解決方案，但沒有好消息.我報告了我的嘗試:

首先嘗試獲取一個表模型:

現在嘗試獲取一個視圖表模型:

當 contentRepository 在模型 ContentRepository.php 中沒有正確的表名設置時:

在模型 ContentRepository.php 中更改表值:

正確時，注意缺少的errorInfo":

顯示數據庫的表:

嘗試正常選擇:

嘗試未準備好的查詢:

嘗試第二次未準備好的查詢:

試試 PDOStatement::fetchAll():

嘗試第二個 PDOStatement::fetchAll():

嘗試語句...:

謝謝

似乎可以添加

'options' =>[PDO::ATTR_EMULATE_PREPARES =>真的]

在數據庫配置中的projectName/config/database.php 文件中.會是這樣:

'mysql' =>['司機' =>'mysql','主機' =>環境('DB_HOST'，'本地主機')，'數據庫' =>env('DB_DATABASE', '偽造'),'用戶名' =>env('DB_USERNAME', '偽造'),'密碼' =>env('DB_PASSWORD', ''),'字符集' =>'utf8','整理' =>'utf8_unicode_ci','前綴' =>'','嚴格' =>錯誤的，'選項' =>[PDO::ATTR_EMULATE_PREPARES =>真的]],

Laravel 5.1.希望能幫到你！

我目前使用的是 Laravel 8，這個解決方案仍然有效.

I'm using last version of laravel (5.1) in a homestead virtual machine (vagrant).

I connect my project to a local mariaDB server, in which I have some table and 2 db-view.

Since I made some select only on the db-view tables, I receive back randomly this error:

General error: 1615 Prepared statement needs to be re-prepared

From today, I always get this error when made select only on the db views. If I open my phpMyAdmin and make the same select it return the correct result.

I tried to open php artisan tinker and select one record of the db-view but it return the same error:

// Select one user from user table
>>> $user = new AppUser
=> <AppUser #000000006dc32a890000000129f667d2> {}
>>> $user = AppUser::find(1);
=> <AppUser #000000006dc32a9e0000000129f667d2> {
       id: 1,
       name: "Luca",
       email: "luca@email.it",
       customerId: 1,
       created_at: "2015-08-06 04:17:57",
       updated_at: "2015-08-11 12:39:01"
   }
>>> 
// Select one source from Source db-view
>>> $source = new AppSource
=> <AppSource #000000006dc32a820000000129f667d2> {}
>>> $source = AppSource::find(1);
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from `sources` where `sources`.`id` = 1 limit 1)'

How can I fix that? I read about a problem with mysqldump (but not in my case) and to increase value of table_definition_cache but it is not sure that it will work and I can't modify them.

Is this a kind of laravel bug?

How can I figure that out?

Edit:

As asked, I add my model source code. Source.php:

<?php

namespace App;

use IlluminateDatabaseEloquentModel;

class Source extends Model
{
    protected $table = 'sources';


    /*
    |--------------------------------------------------------------------------
    | FOREIGN KEYS
    |--------------------------------------------------------------------------
    */

    /**
     * 
     * @return [type] [description]
     */
    public function customersList(){
        return $this->hasMany("AppCustomerSource", "sourceId", "id");
    }


    /**
     * 
     * @return [type] [description]
     */
    public function issues(){
        return $this->hasMany("AppIssue", "sourceId", "id");
    }
}

Edit 2:

If I execute the same query in the project with mysqli it works:

$db = new mysqli(getenv('DB_HOST'), getenv('DB_USERNAME'), getenv('DB_PASSWORD'), getenv('DB_DATABASE'));
if($db->connect_errno > 0){
    dd('Unable to connect to database [' . $db->connect_error . ']');
}
$sql = "SELECT * FROM `sources` WHERE `id` = 4";
if(!$result = $db->query($sql)){
    dd('There was an error running the query [' . $db->error . ']');
}

dd($result->fetch_assoc());

EDIT 3: Afeter 2 month, I'm still there. Same error and no solution found. I decide to try a little solution in aritsan tinker but no good news. I report what I've tried:

First try to fetch a table model:

>>> $user = AppUser::find(1);
=> AppUser {#697
     id: 1,
     name: "Luca",
     email: "luca.d@company.it",
     customerId: 1,
     created_at: "2015-08-06 04:17:57",
     updated_at: "2015-10-27 11:28:14",
   }

Now try to fetch a view table model:

>>> $ir = AppContentRepository::find(15);
IlluminateDatabaseQueryException with message 'SQLSTATE[42S02]: Base table or view not found: 1146 Table 'dbname.content_repositories' doesn't exist (SQL: select * from `content_repositories` where `content_repositories`.`id` = 1 limit 1)'

When contentRepository doesn't have correct table name setup inside the model ContentRepository.php:

>>> $pdo = DB::connection()->getPdo();
=> PDO {#690
     inTransaction: false,
     errorInfo: [
       "00000",
       1146,
       "Table 'dbname.content_repositories' doesn't exist",
     ],
     attributes: [
       "CASE" => NATURAL,
       "ERRMODE" => EXCEPTION,
       "AUTOCOMMIT" => 1,
       "PERSISTENT" => false,
       "DRIVER_NAME" => "mysql",
       "SERVER_INFO" => "Uptime: 2513397  Threads: 12  Questions: 85115742  Slow queries: 6893568  Opens: 1596  Flush tables: 1  Open tables: 936  Queries per second avg: 33.864",
       "ORACLE_NULLS" => NATURAL,
       "CLIENT_VERSION" => "mysqlnd 5.0.11-dev - 20120503 - $Id: id_here $",
       "SERVER_VERSION" => "5.5.5-10.0.17-MariaDB-1~wheezy-wsrep-log",
       "STATEMENT_CLASS" => [
         "PDOStatement",
       ],
       "EMULATE_PREPARES" => 0,
       "CONNECTION_STATUS" => "localiphere via TCP/IP",
       "DEFAULT_FETCH_MODE" => BOTH,
     ],
   }
>>> 

CHANGE TABLE VALUE INSIDE model ContentRepository.php:

>>> $ir = AppContentRepository::find(15);
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from `contentRepository` where `contentRepository`.`id` = 15 limit 1)'

When it is correct, pay attention to "errorInfo" that is missing:

>>> $pdo = DB::connection()->getPdo();
=> PDO {#690
     inTransaction: false,
     attributes: [
       "CASE" => NATURAL,
       "ERRMODE" => EXCEPTION,
       "AUTOCOMMIT" => 1,
       "PERSISTENT" => false,
       "DRIVER_NAME" => "mysql",
       "SERVER_INFO" => "Uptime: 2589441  Threads: 13  Questions: 89348013  Slow queries: 7258017  Opens: 1604  Flush tables: 1  Open tables: 943  Queries per second avg: 34.504",
       "ORACLE_NULLS" => NATURAL,
       "CLIENT_VERSION" => "mysqlnd 5.0.11-dev - 20120503 - $Id: id_here $",
       "SERVER_VERSION" => "5.5.5-10.0.17-MariaDB-1~wheezy-wsrep-log",
       "STATEMENT_CLASS" => [
         "PDOStatement",
       ],
       "EMULATE_PREPARES" => 0,
       "CONNECTION_STATUS" => "localIPhere via TCP/IP",
       "DEFAULT_FETCH_MODE" => BOTH,
     ],
   }

Show db's tables:

>>> $tables = DB::select('SHOW TABLES');
=> [
     {#702
       +"Tables_in_dbname": "table_name_there",
     },
     {#683
       +"Tables_in_dbname": "table_name_there",
     },
     {#699
       +"Tables_in_dbname": "table_name_there",
     },
     {#701
       +"Tables_in_dbname": "table_name_there-20150917-1159",
     },
     {#704
       +"Tables_in_dbname": "contentRepository", */ VIEW TABLE IS THERE!!!! /*
     },
     {#707
       +"Tables_in_dbname": "table_name_there",
     },
     {#684
       +"Tables_in_dbname": "table_name_there",
     },
   ]

Try with normal select:

>>> $results = DB::select('select * from dbname.contentRepository limit 1');
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from dbname.contentRepository limit 1)'

Try unprepared query:

>>> DB::unprepared('select * from dbname.contentRepository limit 1')
=> false

Try second time unprepared query:

>>> DB::unprepared('select * from dbname.contentRepository limit 1')
IlluminateDatabaseQueryException with message '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. (SQL: select * from dbname.contentRepository limit 1)'

Try PDOStatement::fetchAll():

>>> DB::fetchAll('select * from dbname.contentRepository limit 1'); 
PHP warning:  call_user_func_array() expects parameter 1 to be a valid callback, class 'IlluminateDatabaseMySqlConnection' does not have a method 'fetchAll' in /Users/luca/company/Laravel/dbname/vendor/laravel/framework/src/Illuminate/Database/DatabaseManager.php on line 296

Try second PDOStatement::fetchAll():

>>> $pdo::fetchAll('select * from dbname.contentRepository limit 1');
  [SymfonyComponentDebugExceptionFatalErrorException]  
  Call to undefined method PDO::fetchAll()           

Try statement... :

>>> $pdos = DB::statement('select * from dbname.contentRepository limit 1')
IlluminateDatabaseQueryException with message 'SQLSTATE[HY000]: General error: 1615 Prepared statement needs to be re-prepared (SQL: select * from dbname.contentRepository limit 1)'

Thank you

It seems to work adding

'options'   => [
                PDO::ATTR_EMULATE_PREPARES => true
            ]

Inside projectName/config/database.php file in DB configuration. It will be like this:

'mysql' => [
    'driver'    => 'mysql',
    'host'      => env('DB_HOST', 'localhost'),
    'database'  => env('DB_DATABASE', 'forge'),
    'username'  => env('DB_USERNAME', 'forge'),
    'password'  => env('DB_PASSWORD', ''),
    'charset'   => 'utf8',
    'collation' => 'utf8_unicode_ci',
    'prefix'    => '',
    'strict'    => false,
    'options'   => [
        PDO::ATTR_EMULATE_PREPARES => true
    ]
],

Laravel 5.1. Hope it will help!

Edit: I'm currently on Laravel 8 and this solution is still working.

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