[slagfart]

Is this the same as the primary key hashmap thing that Teradata has been doing for many moons? Seems so. If not, why?

Trying to break down the mumbo jumbo in database product releases is a nightmare - it took me a couple of days with SAP HANA, which I think boiled down to in-memory with row and column selection per-table.

It feels like nobody is brave enough to offer an apples-to-apples comparison in their press releases.

[samstave]

Can you give a quick brain dump on hana? good bad and ugly.

[nl]

AFAIK Teradata doesn't allow you to intercept SQL after parsing like Postgres does.

I think you are trying to ask if the sharding example in this post is similar to "the primary key hashmap thing that Teradata has*. I think the answer is yes: teradata does hash-based sharding, and this is how pg_shard implements the same outcome.