[v2.0.0-beta.2][mssql] Sql query fails on building json with aggregate and __typename on every level

[kkumor]

There is an issue why we want to build an query with __typename and aggregation. __typename is added by default by Appollo client for caching purposes.
There is workaround that you can use with Appollo by changing clients settings, but probably this may affect performance.
inMemoryCacheOptions: { addTypename: false }
Same query works fine with PostreSQL.

And here is a bit of my investigation with SQL profiler and potential way to fix this.
First is a query that Hasura is sending right now and second one is maybe a query that you want to send.

[0x777]

The fix has landed on master. It'll be part of the next release.