Improve movie cover page load time

database/migrations/2026_02_12_000000_add_covering_index_for_movie_browse.php

@@ -0,0 +1,53 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Covering index for the movie browse page release query.
+     *
+     * Optimizes the "top 2 releases per movie" UNION ALL subqueries which filter
+     * by imdbid (equality), passwordstatus (range <=), categories_id (IN list),
+     * and order by postdate DESC.
+     *
+     * With imdbid as the leading column, each subquery does a ref lookup per imdbid
+     * value and reads rows in postdate DESC order from the index, filtering
+     * passwordstatus and categories_id from the index key parts.
+     */
+    private string $indexName = 'ix_releases_imdbid_password_cat_postdate';
+
+    private string $table = 'releases';
+
+    public function up(): void
+    {
+        // Check if the index already exists before creating it
+        $indexExists = DB::select(
+            "SHOW INDEX FROM `{$this->table}` WHERE Key_name = ?",
+            [$this->indexName]
+        );
+
+        if (empty($indexExists)) {
+            DB::statement(
+                "CREATE INDEX `{$this->indexName}` ON `{$this->table}` "
+                .'(`imdbid`, `passwordstatus`, `categories_id`, `postdate` DESC)'
+            );
+        }
+    }
+
+    public function down(): void
+    {
+        $indexExists = DB::select(
+            "SHOW INDEX FROM `{$this->table}` WHERE Key_name = ?",
+            [$this->indexName]
+        );
+
+        if (! empty($indexExists)) {
+            Schema::table($this->table, function ($table) {
+                $table->dropIndex($this->indexName);
+            });
+        }
+    }
+};