Try different approach - => _

app.py

@@ -222,23 +222,16 @@ def run_sql_query(container_name: str, query: str) -> dict:
     Infers the database name from the Dokku container name.
     """
     try:
-        # Infer DB name: dokku.postgres.my-service -> my-service
-        # Dokku services follow the naming: dokku.<type>.<service-name>
+        # Infer DB name: dokku.postgres.my-service -> my-service_db or my_service
+        # Dokku typically replaces hyphens with underscores in database names.
         parts = container_name.split(".", 2)
         service_name = parts[2] if len(parts) >= 3 else None
         
-        # In some setups, the DB name might be the service name minus '-db' or '-database'
-        # We'll use the service name but also handle the case where it might be a prefix
-        db_name = service_name
-        if service_name:
-            # Try to strip common suffixes if they are present
-            db_name = re.sub(r'-(db|database|postgres|mysql|mariadb|sql)$', '', service_name)
+        # Most common Dokku pattern: replace - with _
+        db_name = service_name.replace("-", "_") if service_name else None
 
         if "postgres" in container_name:
             # Postgres: use psql with CSV-like output
-            # Target the specific database using -d. 
-            # If the user specifically said it's 'function' while service is 'function-db',
-            # our regex 're.sub' will turn 'function-db' into 'function'.
             db_arg = ["-d", db_name] if db_name else []
             cmd = [DOCKER, "exec", container_name, "psql", "-U", "postgres"] + db_arg + ["-c", query, "-A", "-F", ","]
         elif "mysql" in container_name or "mariadb" in container_name: