send prepare/execute statements down the proper listener

Author: jmordica

lib/commands/server_handshake.js

@@ -122,7 +122,13 @@ class ServerHandshake extends Command {
       case CommandCode.QUERY:
         if (connection.listeners('query').length) {
           const query = packet.readString(undefined, encoding);
-          connection.emit('query', query);
+          if (this._isStatement(query, 'PREPARE') || this._isStatement(query, 'SET')) {
+            connection.emit('stmt_prepare', query);
+          }
+          else if (this._isStatement(query, 'EXECUTE')) {
+            connection.emit('stmt_execute', null, null, null, null, query);
+          }
+          else connection.emit('query', query);
         } else {
           connection.writeError({
             code: Errors.HA_ERR_INTERNAL_ERROR,