SYNC information
Structure of sl_setsync
ssy_setid integer
PRIMARY KEY
REFERENCES sl_set>
ID number of the replication set
ssy_origin integer
REFERENCES sl_node>
ID number of the node
ssy_seqno bigint
Slony-I sequence number
ssy_minxid xxid
Earliest XID in provider system affected by SYNC
ssy_maxxid xxid
Latest XID in provider system affected by SYNC
ssy_xip text
Contains the list of XIDs in progress at SYNC time
ssy_action_list text
action list used during the subscription process. At the time a subscriber copies over data from the origin, it sees all tables in a state somewhere between two SYNC events. Therefore this list must contains all XIDs that are visible at that time, whose operations have therefore already been included in the data copied at the time the initial data copy is done. Those actions may therefore be filtered out of the first SYNC done after subscribing.