On Friday, December 27, 2024 7:39 PM Alexander Uvizhev <uvizhe@xxxxxxxxxx> wrote: Hi, > I'm doing a logical replication using streaming replication protocol and > I'm trying to start a stream from a certain arbitrary point that's > available in WAL. However, both CREATE_REPLICATION_SLOT and > pg_create_logical_replication_slot() create slot with nearly last LSN/XID. > > Is it possible to create a replication slot with arbitrary LSN/XID values? I think it's not supported to specify arbitrary LSN/XID values for a newly created slot in core. However, if you have an existing slot with an older LSN/XID, you can copy it using pg_copy_logical_replication_slot, and then advance the copied slot to your desired position with pg_replication_slot_advance. > > Also pg_create_logical_replication_slot() for some reason gives > different result than CREATE_REPLICATION_SLOT: new slot's `catalog_xmin` > is set to the smallest `catalog_xmin` among already existing slots. > Looks like a bug. Could you provide a script to reproduce this issue ? That would be helpful in diagnosing the reason. Best Regards, Hou zj
