feat: handle subevents in transaction payload event (#827)

* handle subevents in transaction payload event

* encap duplicate code

* fix error handle

---------

Co-authored-by: lance6716 <[email protected]>

Author: hjweddie

canal/sync.go

@@ -96,12 +96,17 @@ func (c *Canal) runSyncBinlog() error {
 			// we only focus row based event
 			err = c.handleRowsEvent(ev)
 			if err != nil {
-				e := errors.Cause(err)
-				// if error is not ErrExcludedTable or ErrTableNotExist or ErrMissingTableMeta, stop canal
-				if e != ErrExcludedTable &&
-					e != schema.ErrTableNotExist &&
-					e != schema.ErrMissingTableMeta {
-					c.cfg.Logger.Errorf("handle rows event at (%s, %d) error %v", pos.Name, curPos, err)
+				c.cfg.Logger.Errorf("handle rows event at (%s, %d) error %v", pos.Name, curPos, err)
+				return errors.Trace(err)
+			}
+			continue
+		case *replication.TransactionPayloadEvent:
+			// handle subevent row by row
+			ev := ev.Event.(*replication.TransactionPayloadEvent)
+			for _, subEvent := range ev.Events {
+				err = c.handleRowsEvent(subEvent)
+				if err != nil {
+					c.cfg.Logger.Errorf("handle transaction payload rows event at (%s, %d) error %v", pos.Name, curPos, err)
 					return errors.Trace(err)
 				}
 			}
@@ -232,11 +237,17 @@ func (c *Canal) handleRowsEvent(e *replication.BinlogEvent) error {
 	ev := e.Event.(*replication.RowsEvent)
 
 	// Caveat: table may be altered at runtime.
-	schema := string(ev.Table.Schema)
-	table := string(ev.Table.Table)
+	schemaName := string(ev.Table.Schema)
+	tableName := string(ev.Table.Table)
 
-	t, err := c.GetTable(schema, table)
+	t, err := c.GetTable(schemaName, tableName)
 	if err != nil {
+		e := errors.Cause(err)
+		// ignore errors below
+		if e == ErrExcludedTable || e == schema.ErrTableNotExist || e == schema.ErrMissingTableMeta {
+			err = nil
+		}
+
 		return err
 	}
 	var action string