如何為Laravel遷移創建沒有條件且沒有分隔符的MySQL觸發器？

Question

我有一個Laravel項目，該項目已經有一個帶有SQL腳本的數據庫，並且我試圖將MySQL腳本放入遷移中以使用Eloquent。 我的數據庫具有使用DELIMITER $$觸發器，根據此問題 ，我似乎無法在腳本中使用DELIMITER $$ ，因為這是MySQL客戶端命令，而MySQL PDO無法使用PHP對其進行訪問。

有沒有一種方法可以避免DELIMITER $$但在MySQL觸發器中仍具有條件，以使其可用於Laravel數據庫遷移？

migration.php：

<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Support\Facades\DB;
use Illuminate\Support\Facades\File;
use Illuminate\Support\Facades\Log;

class RunInitScriptSql extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
     public function up()
     {
        $sql_dump = File::get(base_path("database/billing_system_stable.sql"));
        $sql_dump_insert = File::get(base_path("database/billing_system_insertions.sql"));
        $sql_dump_trigger = File::get(base_path("/database/billing_system_triggers.sql"));

        DB::connection('mysql')->getPdo()->exec("CREATE DATABASE IF NOT EXISTS billing_system;");
        DB::connection('mysql')->getPdo()->exec(
            $sql_dump .
            $sql_dump_insert .
            $sql_dump_trigger
        );
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {

    }
}

觸發樣本：

DROP TRIGGER IF EXISTS before_update_typesoumission;
DELIMITER $$
CREATE TRIGGER before_update_typesoumission
  BEFORE UPDATE
  ON typesoumission
  FOR EACH ROW
    IF NEW.typeSoumission = 'Résidentiel'
    THEN
      SET NEW.ratio = 1;
    ELSE
      SET NEW.ratio =
      NEW.tauxHoraire / (SELECT tauxHoraire
                         FROM typesoumission
                         WHERE typeSoumission = 'Résidentiel');
    END IF;
$$
DELIMITER ;

Answer 1

注意盡管此解決方案在MySQL上運行良好，但是OP使用的MariaDB似乎並不喜歡它。

您應該能夠將CREATE TRIGGER放入查詢中。 在我的情況下，我使用$link （ $link = new PDO("mysql:host=$server;dbname=$db;charset=utf8", $user, $pass, $options); ）作為我的連接。 我正在運行PHP7和MySQL5.6：

$link->exec("DROP TRIGGER IF EXISTS before_update_typesoumission");
$link->exec("CREATE TRIGGER before_update_typesoumission
  BEFORE UPDATE
  ON typesoumission
  FOR EACH ROW
    IF NEW.typeSoumission = 'Résidentiel'
    THEN
      SET NEW.ratio = 1;
    ELSE
      SET NEW.ratio =
      NEW.tauxHoraire / (SELECT tauxHoraire
                         FROM typesoumission
                         WHERE typeSoumission = 'Résidentiel');
    END IF;");
$result = $link->query("SELECT * FROM INFORMATION_SCHEMA.TRIGGERS WHERE TRIGGER_NAME='before_update_typesoumission'");
print_r($result->fetch());

輸出：

Array
(
    [TRIGGER_CATALOG] => def
    [TRIGGER_SCHEMA] => test
    [TRIGGER_NAME] => before_update_typesoumission
    [EVENT_MANIPULATION] => UPDATE
    [EVENT_OBJECT_CATALOG] => def
    [EVENT_OBJECT_SCHEMA] => test
    [EVENT_OBJECT_TABLE] => typesoumission
    [ACTION_ORDER] => 0
    [ACTION_CONDITION] => 
    [ACTION_STATEMENT] => IF NEW.typeSoumission = 'Résidentiel'
    THEN
      SET NEW.ratio = 1;
    ELSE
      SET NEW.ratio =
      NEW.tauxHoraire / (SELECT tauxHoraire
                         FROM typesoumission
                         WHERE typeSoumission = 'Résidentiel');
    END IF
    [ACTION_ORIENTATION] => ROW
    [ACTION_TIMING] => BEFORE
    [ACTION_REFERENCE_OLD_TABLE] => 
    [ACTION_REFERENCE_NEW_TABLE] => 
    [ACTION_REFERENCE_OLD_ROW] => OLD
    [ACTION_REFERENCE_NEW_ROW] => NEW
    [CREATED] => 
    [SQL_MODE] => STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION
    [DEFINER] => test@10.1.10.0/255.255.255.0
    [CHARACTER_SET_CLIENT] => utf8
    [COLLATION_CONNECTION] => utf8_general_ci
    [DATABASE_COLLATION] => utf8_general_ci
)