Tanmai Gopal @ GraphQL Asia: Tanmai talks about the approach of Hasura of building a GraphQL API that can leverage an existing database. It covers the approach that was taken of building a declarative authorization system, addressing the n+1 database query problem and other performance improvements. Also on “realtime” GraphQL (live-queries vs events) and what approach Hasura took and achieving performance/scalability. With GraphQL making it easy to “join data” across tables, Tanmai also talks …