在laravel 8中浮点型或双精度型的选择

use Illuminate\Support\Facades\DB;

$result = DB::select('SELECT bccomp(?, ?) as result', [0.1 + 0.2, 0.3])[0]->result;
if ($result == 0) {
    // 两个浮点数相等
}

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

class CreateProductsTable extends Migration
{
    public function up()
    {
        Schema::create('products', function (Blueprint $table) {
            $table->id();
            $table->string('name');
            $table->float('price'); // 浮点型
            $table->double('weight', 15, 8); // 双精度型，总长度15位，小数点后8位
            $table->timestamps();
        });
    }

    public function down()
    {
        Schema::dropIfExists('products');
    }
}