<?php
  
  use Illuminate\Database\Migrations\Migration;
  use Illuminate\Database\Schema\Blueprint;
  use Illuminate\Support\Facades\Schema;
  
  class CreateVdmTable extends Migration
  {
      /**
       * Run the migrations.
       *
       * @return void
       */
      public function up()
      {
          Schema::create('vdm', function (Blueprint $table) {
              $table->bigIncrements('uuid');
              $table->timestamp('time');
              $table->string('asset_id');
              $table->string('value');
          });
  
          DB::raw("SELECT create_hypertable('vdm', 'time', 'asset_id', 2);");
          DB::raw("CREATE INDEX ON vdm (asset_id, time desc);");
          DB::raw("CREATE INDEX ON vdm (time desc, asset_id);");
      }
  
      /**
       * Reverse the migrations.
       *
       * @return void
       */
      public function down()
      {
          Schema::dropIfExists('vdm');
      }
  }