在 MySQL 8 中，in 条件用于多个字段，查询结果为空的排查
1、在 MySQL 8 中，in 条件用于多个字段，查询结果为空。如图1
图1
1 2 3 4 5 6 7 8 9 10 11 | SELECT `id`, `name`, `email`, `type` FROM `customers` WHERE ( 'name,email' ) IN ( '(\'客户姓名二\',\'44445@163.com\'),(\'客户姓名\',\'44445@163.com\')' ) ORDER BY `id` DESC |
2、参考：在 MySQL 8 中，in 条件用于多个字段 查询结果不为空的 SQL 如下
1 2 | SELECT * FROM `customers` WHERE ( NAME, email ) IN (( '123', '123@outlook.com' ),( '我是客户姓名33', '1303842899@qq.com' )) |
3、参考：在 Laravel 9 中使用原生表达查询时，报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; 调整代码，打印绑定参数，符合预期，没有问题。如图2
![参考：在 Laravel 9 中使用原生表达查询时，报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax;](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/2.png)
图2
1 2 3 4 5 6 7 8 9 | $str = '';foreach ($criteria['whereRawIn'][1] as $key => $customer) { $str .= ($key == 0) ? '(\'' : ',(\''; $str .= implode('\',\'', $customer) . '\')';}var_dump($criteria['whereRawIn'][0]);var_dump($str);exit; |
1 2 | string(10) "name,email"string(2959) "('客户姓名二','44445@163.com'),('客户姓名','44445@163.com')" |
4、调整代码实现如下
1 2 3 4 5 6 7 8 9 10 11 | $str = ''; foreach ($criteria['whereRawIn'][1] as $key => $customer) { $str .= ($key == 0) ? '(\'' : ',(\''; $str .= implode('\',\'', $customer) . '\')'; }// var_dump('(' . $criteria['whereRawIn'][0] . ')');// var_dump('(' . $str . ')');// exit; $builder->whereRaw('? in ?', ['(' . $criteria['whereRawIn'][0] . ')', '(' . $str . ')']); |
5、运行时报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ‘? order by `id` desc’ at line 1 。如图3
![运行时报错：SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '? order by `id` desc' at line 1 。](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/3.png)
图3
图4
7、调整代码实现如下，运行时报错：SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain 2 column(s) 。但是，将报错的 SQL 复制到数据库中，手动执行，执行成功。如图5
![调整代码实现如下，运行时报错：SQLSTATE[21000]: Cardinality violation: 1241 Operand should contain 2 column(s) 。但是，将报错的 SQL 复制到数据库中，手动执行，执行成功](https://www.shuijingwanwq.com/wp-content/uploads/2024/06/5.png)
图5
1 2 3 4 5 6 7 8 9 10 11 12 13 | $str = ''; foreach ($criteria['whereRawIn'][1] as $key => $customer) { $str .= ($key == 0) ? '(\'' : ',(\''; $str .= implode('\',\'', $customer) . '\')'; }// var_dump('(' . $criteria['whereRawIn'][0] . ')');// var_dump('(' . $str . ')');// exit; // $builder->whereRaw('? in ?', ['(' . $criteria['whereRawIn'][0] . ')', '(' . $str . ')']); $builder->whereRaw('(?,?) in (?)', ['name', 'email', $str]); // $builder->whereRaw('( ' . $criteria['whereRawIn'][0] . ' ) in (?)', [$str]); |
8、最终决定放弃此 SQL，调整为另外一种 SQL 格式。代码实现如下，生成 SQL 如下，程序运行时不再报错，查询结果符合预期。如图6
图6
1 2 3 4 5 6 | foreach ($criteria['names_emails'] as $customer) { $builder->orWhere(function ($query) use ($customer) { $query->where('name', $customer[0]) ->where('email', $customer[1]); });} |
1 2 3 4 5 6 7 8 9 10 11 12 | SELECT `id`, `name`, `email`, `type` FROM `customers` WHERE ( `name` = '客户姓名二' AND `email` = '客户姓名二' ) OR ( `name` = '客户姓名' AND `email` = '客户姓名' )ORDER BY `id` DESC |
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