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Just to be clear, the JOINS were removed for the vertical sharding prior to looking at Cloud Spanner. Cloud Spanner fully supports complex JOINS of many times (e.g. INNER, OUTER)

Details - https://cloud.google.com/spanner/docs/query-syntax#join-type...

Disclaimer: I work on Cloud Spanner

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How did you go from 10s of ms for an update for 2012 Spanner, to sub-ms update (best case) for Cloud Spanner according to Quizlet? Did TrueTime get an order of magnitude better? Or is Quizlet measuring the wrong thing?

Sorry for the confusion but I meant the DML portion.

It sounded like you can only modify by primary key? Can you make a transaction that contains a query and a bunch of updates by PK ?

And yeah it makes it sound like writing an OEM adapter will be much more difficult.

From reading the docs, the answer seems to clearly be yes, but I'm open to being corrected.

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