Connection events

Feature request

It would be great to have some way to monitor connection events for reporting purposes and to setup defaults for the connection. For example, in Node I would run:

dbPool.on("connect", (client: PoolClient) => {
  if (ENV.TEST) {
    // Prefer indexes even on small tables. This disables optimizations in PostgreSQL that 
    // prefers scanning small tables, thus changing how EXPLAIN works between test and prod environments. 
    // @see: https://www.postgresql.org/docs/9.4/static/runtime-config-query.html#GUC-ENABLE-SEQSCAN
    client.query(`SET enable_seqscan = OFF;`);
  }
});

I don’t see a similar way to do this in the Deno driver.

[Soremwar]

I’m not to keen to integrate uncontrollable async behaviour such as the EventEmitter style you are proposing

I find @ebebbington solution much more reliable for the current use case, and could be roughly translated to the following

export const getTestClient = async () => {
  const client = await pool.connect();
  if (Deno.env.get("TEST") === "true") {
    await client.queryArray`SET enable_seqscan = OFF`;
  }
  return client;
}

[Soremwar]

Closing due to inactivity