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Why are CockroachDB and PostgreSQL compatible?  ↦

There was a discussion in Slack today about the recent Postgres episode on The Changelog and a mention of considering CockroachDB in order to be distributed-by-default and Postgres compatible. But why is CockroachDB Postgres compatible? Here’s a breakdown from Ben Darnell, CTO and Co-Founder of Cockroach Labs…

CockroachDB is built to be largely compatible with PostgreSQL, meaning that software written to use PostgreSQL can sometimes (often!) be used with CockroachDB without changes.

Initially, CockroachDB toyed with the idea of compatibility with MySQL. What tipped the balance in PostgreSQL’s favor was a combination of multiple factors. There was initially a clear impression that PostgreSQL’s documentation of its network protocol was clearer, more detailed and overall more supportive of a third party implementation than MySQL’s documentation of its own protocol.


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