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Comment by jordanlewis | Hacker News Reader

I'm an engineer on the SQL team at CockroachDB. We're very aware of our missing support for array column types - and in fact beginning to add support for arrays is one of my team's priorities for the next release cycle.

What kind of other recent SQL features introduced in Postgres 9.4 do you use? Postgres has a ton of features, as I'm sure you're aware, and while we strive for wire compatibility with Postgres it's not a goal of ours to implement support for every Postgres feature out there.

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I double checked my codebase and it looks like it's just JSONB, which CockroachDB also doesn't support [0]. Sorry to bother about missing features, but there are really some things that prevent a smooth transition from Postgres.

[0] https://github.com/cockroachdb/cockroach/issues/2969

Yep, JSONB is on our roadmap as well, although it won't come before array column type support. Thanks for the feedback - I'd personally love to see migrations from PostgreSQL to CockroachDB become seamless for more complex use cases as we continue development.

It occurred to me to migrate Odoo ERP to CockroachDB, scaling up the DB is one of our biggest challenges with some of our clients.

However Odoo leans heavily on Postgres, migration would be a lot of work I imagine. The first snag I've hit with CockroachDB is the lack of 'CREATE SEQUENCE'.

Plus, Odoo uses REPEATABLE READ + a hand-rolled system of locks for consistency, I'm not sure how that would play out with CockroachDB. In my experience some of the performance issues come more from long lived locks in the app than from sheer DB performance.

Postgres' network types [0] are very useful, especially when you use the << and >> operators to query for addresses contained in a subnet.

[0] https://www.postgresql.org/docs/9.5/static/datatype-net-type...

JSON/JSONB datatypes, listen/notify, spatial extensions.

JSON/JSONB will come after array support. As far as I know, we don't have any concrete plans at this time to support listen/notify or spatial datatypes.

what's the story for change data capture with CockroachDB? Postgres 9.4 added logical replication, which is incredibly useful for this use case.

Also, we use JSONB fairly extensively -- I see the tracking issue here https://github.com/cockroachdb/cockroach/issues/2969 but no movement.

Regarding change data capture, please see Arjun's answer: https://news.ycombinator.com/item?id=14309173

Make sure to take a look at Debezium: http://debezium.io/

It's a really solid CDC framework which has connectors for PostgreSQL, MySQL and MongoDB.

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