Re: Are Foreign Key Disabled During Logical Replication Initial Sync?

[Peter Eisentraut <peter.eisentraut@xxxxxxxxxxxxxxxx>]

On 07.12.21 08:51, Avi Weinberg wrote:
> Just to clarify, they are disabled during initial sync only or are always disabled on subscriber side?
> Are all triggers disabled during initial sync or just foreign keys?

All triggers are by default disabled on replicas.  See the ALTER TABLE 
clauses DISABLE/ENABLE [ REPLICA | ALWAYS ] TRIGGER to change this.

> How can I know that initial sync completed for all tables?  Is it checking when pg_subscription_rel.srsubstate is 'i' or 'd' for all tables or there is a better way?

There are various ways to phrase this.  The test suite often uses this 
query:

SELECT count(1) = 0 FROM pg_subscription_rel WHERE srsubstate NOT IN 
('r', 's');