On 4 May 2017 at 20:05, Magnus Hagander <magnus@hagander.net> wrote: > PFA a patch that adds a new function, pg_move_replication_slot, that makes > it possible to move the location of a replication slot without actually > consuming all the WAL on it.
> This can be useful for example to keep replication slots in sync between > different servers in a replication cluster.
It needs a test to ensure it only operates on physical slots. It should ERROR on a logical slot, since it has no way of correctly advancing the catalog_xmin or finding a reasonable restart_lsn for logical decoding.
I guess that makes sense, yeah. I didn't try it with that :)
I'm still fine with the name, since I plan to add that capability in pg11 by running through logical decoding and ReorderBufferSkip()ing each xact until we reach the target lsn.
