Stores each change to be propagated to subscriber nodes
Structure of sl_log_2
log_origin integer
Origin node from which the change came
log_xid xxid
Transaction ID on the origin node
log_tableid integer
The table ID (from sl_table.tab_id) that this log entry is to affect
log_actionseq bigint
log_cmdtype character(1)
Replication action to take. U = Update, I = Insert, D = DELETE
log_cmddata text
The data needed to perform the log action