query db from edge function returns error PGRST002

// Setup type definitions for built-in Supabase Runtime APIs
import "jsr:@supabase/functions-js/edge-runtime.d.ts";
interface reqPayload {
  name: string;
}

import "jsr:@supabase/functions-js/edge-runtime.d.ts";
// @ts-ignore
import { createClient } from "npm:@supabase/[email protected]";

const supabase = createClient(
  Deno.env.get("SUPABASE_URL")!,
  Deno.env.get("SUPABASE_SERVICE_ROLE_KEY")!,
);

console.info('server started');

Deno.serve(async (req: Request) => {
  const { name }: reqPayload = await req.json();
  const result = await supabase.from('pg_catalog.pg_tables').select('*');
  const data = {
    message: `Hello ${name}!`,
    result: result
  };

  return new Response(
    JSON.stringify(data),
    { headers: { 'Content-Type': 'application/json', 'Connection': 'keep-alive' }}
  );
});

{"message":"Hello Functions!","result":{"error":{"code":"PGRST002","details":null,"hint":null,"message":"Could not query the database for the schema cache. Retrying."},"data":null,"count":null,"status":503,"statusText":"Service Unavailable"}}