fix(connection): use queueing instead of event emitter for `createCol…

…lection()` and other helpers to avoid event emitter warning

Fix #9778

lib/connection.js

@@ -73,6 +73,7 @@ function Connection(base) {
   } else {
     this.id = base.connections.length;
   }
+  this._queue = [];
 }
 
 /*!
@@ -569,9 +570,7 @@ function _wrapConnHelper(fn) {
       // Re: gh-8534
       immediate(() => {
         if (this.readyState === STATES.connecting && this._shouldBufferCommands()) {
-          this.once('open', function() {
-            fn.apply(this, argsWithoutCb.concat([cb]));
-          });
+          this._queue.push({ fn: fn, ctx: this, args: argsWithoutCb.concat([cb]) });
         } else if (this.readyState === STATES.disconnected && this.db == null) {
           cb(disconnectedError);
         } else {
@@ -631,6 +630,11 @@ Connection.prototype.error = function(err, callback) {
 Connection.prototype.onOpen = function() {
   this.readyState = STATES.connected;
 
+  for (const d of this._queue) {
+    d.fn.apply(d.ctx, d.args);
+  }
+  this._queue = [];
+
   // avoid having the collection subscribe to our event emitter
   // to prevent 0.3 warning
   for (const i in this.collections) {