在Laravel 4迁移中创建MYSQL过程 [英] Creating MYSQL Procedure in Laravel 4 Migrations

问题描述

是否有一种方法可以在Laravel 4迁移中生成存储的MYSQL过程?

Is there a way to generate stored MYSQL procedures in a Laravel 4 migration?

例如，这是一个简单的过程生成查询，以字符串形式存储(通过

For example, here's a simple procedure generation query stored as a string (via a Heredoc)

    $query = <<<SQL
DELIMITER $$
DROP PROCEDURE IF EXISTS test$$
CREATE PROCEDURE test()
BEGIN
    INSERT INTO `test_table`(`name`) VALUES('test');
END$$
DELIMITER ;
SQL;

    DB:statement(DB::RAW($query));

---

在迁移的up()函数中运行此命令时，出现此错误:

---

When Running this in a migration's up() function I get this error:

推荐答案

您的代码有两个主要问题

There are two major problems with your code

1. DELIMITER不是有效的sql语句.这只是一个MySql客户端命令.因此，请不要使用它. 顺便说一句，您得到的错误恰恰告诉了您.
2. 您不能使用DB::statement执行CREATE PROCEDURE代码，因为它使用了已准备好的语句 exec() DB::connection()->getPdo()->exec()

1. DELIMITER is not a valid sql statement. It's just a MySql client command. So just don't use it. BTW the error you get tells you exactly that.
2. You can't use DB::statement to execute CREATE PROCEDURE code because it uses prepared statement source code for Connection. You can use PDO exec() DB::connection()->getPdo()->exec() instead

话虽如此，虚构的tags表的样本迁移可能看起来像这样

That being said a sample migration for imaginary tags table might look like this

class CreateTagsTable extends Migration {

    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('tags', function($table){
            $table->increments('id');
            $table->string('name')->unique();
        });
$sql = <<<SQL
DROP PROCEDURE IF EXISTS sp_insert_tag;
CREATE PROCEDURE sp_insert_tag(IN _name VARCHAR(32))
BEGIN
    INSERT INTO `tags`(`name`) VALUES(_name);
END
SQL;
        DB::connection()->getPdo()->exec($sql);
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        $sql = "DROP PROCEDURE IF EXISTS sp_insert_tag";
        DB::connection()->getPdo()->exec($sql);
        Schema::drop('tags');
    }
}

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