DEBUG Redshift: more pg connection debugging

Author: KSDaemon

packages/cubejs-postgres-driver/src/PostgresDriver.ts

@@ -138,7 +138,13 @@ export class PostgresDriver<Config extends PostgresDriverConfiguration = Postgre
       ...config
     });
     this.pool.on('error', (err) => {
-      console.log(`Unexpected error on idle client: ${err.stack || err}`); // TODO
+      console.log(`[${new Date().toISOString()}] Unexpected error on idle client: ${err.stack || err}`);
+    });
+    this.pool.on('connect', (client) => {
+      console.log(`[${new Date().toISOString()}] New pool connection established`);
+    });
+    this.pool.on('remove', (client) => {
+      console.log(`[${new Date().toISOString()}] Pool connection removed`);
     });
     this.config = <Partial<Config>>{
       ...this.getInitialConfiguration(dataSource),