Cannot Upgrade Google Cloud SQL to Second Generation

Question

I cannot upgrade the First generation Google Cloud Instance to Second generation instance using MySQL Second Generation upgrade wizard in console. During the check configuration screen, I get Tables that use the MEMORY storage engine found error due to which I cannot proceed further as shown in screenshot According to documentation at Upgrading a First Generation instance to Second Generation, I have verified using the query mentioned in documentation.

SELECT table_schema, table_name, table_type
   FROM information_schema.tables
   WHERE engine = 'MEMORY' AND
   table_schema NOT IN
   ('mysql','information_schema','performance_schema');

but found no tables using a MEMORY storage engine as shown below.

Answer 1

I managed to resolve the error and proceeded with upgrade. I had a to remove a table from the performance_schema database that did not use the PERFORMANCE_SCHEMA storage engine before starting the upgrade process. Seems Google Cloud console threw in an irrelevant error!