Announcement on Google Cloud blog:<p><a href="https://cloud.google.com/blog/topics/developers-practitioners/postgresql-interface-adds-familiarity-and-portability-cloud-spanner" rel="nofollow">https://cloud.google.com/blog/topics/developers-practitioner...</a>
It looks like Spanner already supported their own SQL interface. So are there significant differences between their Google SQL syntax and the PostgreSQL syntax?