Requirements

To use pglogical the provider and subscriber must be running PostgreSQL 9.4 or newer.

The pglogical extension must be installed on both provider and subscriber. You must CREATE EXTENSION pglogical on both.

Tables on the provider and subscriber must have the same names and be in the same schema. Future revisions may add mapping features.

Tables on the provider and subscriber must have the same columns, with the same data types in each column. CHECK constraints, NOT NULL constraints, etc., must be the same or weaker (more permissive) on the subscriber than the provider.

Tables must have the same PRIMARY KEYs. It is not recommended to add additional UNIQUE constraints other than the PRIMARY KEY (see below).

Some additional requirements are covered in Limitations and Restrictions.