I am using Postgresql's logical replication in my application with the test_decoding plugin. I am trying to understand the difference between replication protocol and replication functions provided by Postgresql. Specifically, CREATE_REPLICATION_SLOT call returns a snapshot name, but pg_create_logical_replication_slot does not. The driver I am using does not support replication protocol, so I am trying to use the functions. But how can I retrieve the snapshot from the function call?
Can I use a combination of pg_export_snapshot with pg_create_logical_replication_slot to get a snapshot of the open transaction, that I can then use with pg_dumpfor example?
Thanks.