Create logical replication and test

create_publication_and_slot.sql

-- Create publication
CREATE PUBLICATION cdc;

-- Create slot
SELECT pg_create_logical_replication_slot('test_slot_v1', 'pgoutput');

-- Create example table
CREATE TABLE replication_test_v1
(
  id integer NOT NULL PRIMARY KEY,
  name text
);

-- Add table to publication
ALTER PUBLICATION cdc ADD TABLE replication_test_v1;

-- Insert example data
INSERT INTO replication_test_v1(id, name) VALUES
  (1, 'Number 1')
;

-- Peak changes (does not consume changes)
SELECT pg_logical_slot_peek_binary_changes('test_slot_v1', NULL, NULL, 'publication_names', 'cdc', 'proto_version', '1');

-- Get changes (consumes changes)
SELECT pg_logical_slot_get_binary_changes('test_slot_v1', NULL, NULL, 'publication_names', 'cdc', 'proto_version', '1');

-- Drop slot
-- SELECT pg_drop_replication_slot ('test_slot_v1');

create_subscription.sql

CREATE SUBSCRIPTION mysub
       CONNECTION <conn stuff>
       PUBLICATION cdc
       WITH (slot_name=test_slot_v1, create_slot=false);