diff --git a/examples/crash_reporter/backend/public/api/diag.php b/examples/crash_reporter/backend/public/api/diag.php
index 336f01b..ae36bdc 100644
--- a/examples/crash_reporter/backend/public/api/diag.php
+++ b/examples/crash_reporter/backend/public/api/diag.php
@@ -41,7 +41,14 @@ try {
     $pdo = Database::pdo();
     $tables = Database::listTables($pdo);
     $out['tables'] = $tables;
-    $out['tickets_table'] = in_array('tickets', $tables, true);
+    $out['tickets_table'] = Database::ticketsTableExists($pdo);
+    if (Database::isMysql()) {
+        try {
+            $out['mysql_database'] = $pdo->query('SELECT DATABASE()')->fetchColumn();
+        } catch (Throwable $e) {
+            $out['mysql_database'] = $e->getMessage();
+        }
+    }
     if (!$out['tickets_table']) {
         $out['tickets_migration'] = Database::ticketsMigrationHint();
     }
diff --git a/examples/crash_reporter/backend/src/Database.php b/examples/crash_reporter/backend/src/Database.php
index b187d13..aea8e3b 100644
--- a/examples/crash_reporter/backend/src/Database.php
+++ b/examples/crash_reporter/backend/src/Database.php
@@ -519,15 +519,28 @@ final class Database {
         );
     }
 
+    private static function mysqlQuoteIdentifier(string $name): string {
+        return '`' . str_replace('`', '``', $name) . '`';
+    }
+
     public static function tableExists(PDO $pdo, string $table): bool {
         if (self::isMysql()) {
-            $db = cfg('db.mysql.database', 'androidcast_crashes');
-            $stmt = $pdo->prepare(
-                'SELECT 1 FROM information_schema.tables
-                 WHERE table_schema = ? AND table_name = ? LIMIT 1'
-            );
-            $stmt->execute([$db, $table]);
-            return $stmt->fetchColumn() !== false;
+            // App DB users often lack information_schema visibility; SHOW TABLES uses normal grants.
+            $stmt = $pdo->query('SHOW TABLES LIKE ' . $pdo->quote($table));
+            if ($stmt !== false && $stmt->fetchColumn() !== false) {
+                return true;
+            }
+            try {
+                $pdo->query('SELECT 1 FROM ' . self::mysqlQuoteIdentifier($table) . ' LIMIT 0');
+                return true;
+            } catch (PDOException $e) {
+                $sqlState = $e->getCode();
+                $errno = (int) ($e->errorInfo[1] ?? 0);
+                if ($sqlState === '42S02' || $errno === 1146) {
+                    return false;
+                }
+                throw $e;
+            }
         }
         $stmt = $pdo->prepare(
             "SELECT 1 FROM sqlite_master WHERE type = 'table' AND name = ? LIMIT 1"
@@ -539,13 +552,11 @@ final class Database {
     /** @return list<string> */
     public static function columnNames(PDO $pdo, string $table): array {
         if (self::isMysql()) {
-            $db = cfg('db.mysql.database', 'androidcast_crashes');
-            $stmt = $pdo->prepare(
-                'SELECT column_name AS name FROM information_schema.columns
-                 WHERE table_schema = ? AND table_name = ?'
-            );
-            $stmt->execute([$db, $table]);
-            return array_column($stmt->fetchAll(PDO::FETCH_ASSOC), 'name');
+            $stmt = $pdo->query('SHOW COLUMNS FROM ' . self::mysqlQuoteIdentifier($table));
+            if ($stmt === false) {
+                return [];
+            }
+            return array_column($stmt->fetchAll(PDO::FETCH_ASSOC), 'Field');
         }
         return array_column(
             $pdo->query('PRAGMA table_info(' . preg_replace('/[^a-z0-9_]/i', '', $table) . ')')->fetchAll(PDO::FETCH_ASSOC),
@@ -556,13 +567,11 @@ final class Database {
     /** @return list<string> */
     public static function listTables(PDO $pdo): array {
         if (self::isMysql()) {
-            $db = cfg('db.mysql.database', 'androidcast_crashes');
-            $stmt = $pdo->prepare(
-                'SELECT table_name FROM information_schema.tables
-                 WHERE table_schema = ? ORDER BY table_name'
-            );
-            $stmt->execute([$db]);
-            return $stmt->fetchAll(PDO::FETCH_COLUMN);
+            $stmt = $pdo->query('SHOW TABLES');
+            if ($stmt === false) {
+                return [];
+            }
+            return array_values(array_filter($stmt->fetchAll(PDO::FETCH_COLUMN), 'is_string'));
         }
         return $pdo->query(
             "SELECT name FROM sqlite_master WHERE type = 'table' ORDER BY name"