add only show dml control

parse.go

@@ -346,6 +346,7 @@ type BinlogFilter struct {
 	BigThan       int
 	SmallThan     int
 	OnlyShowGtid  bool
+	OnlyShowDML   bool
 }
 
 func parseBinlogWithFilter(r io.Reader, parse *replication.BinlogParser, filter BinlogFilter, fn func(Transaction) bool) error {
@@ -449,7 +450,7 @@ func parseBinlogWithFilter(r io.Reader, parse *replication.BinlogParser, filter
 		if filter.SmallThan != 0 && filter.SmallThan < tx.Size {
 			return true
 		}
-		if !filter.OnlyShowGtid && tx.validSchemaCount == 0 {
+		if !filter.OnlyShowGtid && filter.OnlyShowDML && tx.validSchemaCount == 0 {
 			return true
 		}
 		return fn(tx)