reduce the number of interactions between MySQL incremental synchronization and consul

Author: LordofAvernus

drivers/mysql/mysql/applier.go

@@ -288,12 +288,13 @@ func (a *Applier) Run() {
 		return
 	}
 	a.ai.EntryExecutedHook = func(entry *common.BinlogEntry) {
-		err = a.storeManager.SaveOracleSCNPos(a.subject, entry.Coordinates.LogPos, entry.Coordinates.LastCommitted)
-		if err != nil {
-			a.onError(common.TaskStateDead, errors.Wrap(err, "SaveOracleSCNPos"))
-			return
+		if entry.Coordinates.SID == [16]byte{0} {
+			err = a.storeManager.SaveOracleSCNPos(a.subject, entry.Coordinates.LogPos, entry.Coordinates.LastCommitted)
+			if err != nil {
+				a.onError(common.TaskStateDead, errors.Wrap(err, "SaveOracleSCNPos"))
+				return
+			}
 		}
-
 		if entry.Final {
 			a.gtidCh <- &entry.Coordinates
 		}