Adds parsing of IntVarEvents

Author: IvoGoman

replication/const.go

@@ -217,3 +217,11 @@ const (
 	TABLE_MAP_OPT_META_ENUM_AND_SET_DEFAULT_CHARSET
 	TABLE_MAP_OPT_META_ENUM_AND_SET_COLUMN_CHARSET
 )
+
+type IntVarEventType byte
+
+const (
+	INVALID IntVarEventType = iota
+	LAST_INSERT_ID
+	INSERT_ID
+)

replication/event.go

@@ -643,3 +643,19 @@ func (e *MariadbGTIDListEvent) Dump(w io.Writer) {
 	fmt.Fprintf(w, "Lists: %v\n", e.GTIDs)
 	fmt.Fprintln(w)
 }
+
+type IntVarEvent struct {
+	Type  IntVarEventType
+	Value uint64
+}
+
+func (i *IntVarEvent) Decode(data []byte) error {
+	i.Type = IntVarEventType(data[0])
+	i.Value = binary.LittleEndian.Uint64(data[1:])
+	return nil
+}
+
+func (i *IntVarEvent) Dump(w io.Writer) {
+	fmt.Fprintf(w, "Type: %d\n", i.Type)
+	fmt.Fprintf(w, "Value: %d\n", i.Value)
+}

replication/event_test.go

@@ -97,3 +97,21 @@ func (_ *testDecodeSuite) TestGTIDEventMysql8NewFields(c *C) {
 		c.Assert(ev.OriginalServerVersion, Equals, tc.expectOriginalServerVersion)
 	}
 }
+
+func (_ *testDecodeSuite) TestIntVarEvent(c *C) {
+	// IntVarEvent Type LastInsertID, Value 13
+	data := []byte{1, 13, 0, 0, 0, 0, 0, 0, 0}
+	ev := IntVarEvent{}
+	err := ev.Decode(data)
+	c.Assert(err, IsNil)
+	c.Assert(ev.Type, Equals, LAST_INSERT_ID)
+	c.Assert(ev.Value, Equals, uint64(13))
+
+	// IntVarEvent Type InsertID, Value 23
+	data = []byte{2, 23, 0, 0, 0, 0, 0, 0, 0}
+	ev = IntVarEvent{}
+	err = ev.Decode(data)
+	c.Assert(err, IsNil)
+	c.Assert(ev.Type, Equals, INSERT_ID)
+	c.Assert(ev.Value, Equals, uint64(23))
+}

replication/generic_event.go

@@ -141,11 +141,6 @@ func (e *GenericEvent) Decode(data []byte) error {
 // 	Seed2 uint64
 // }
 
-// type IntVarEvent struct {
-// 	Type  uint8
-// 	Value uint64
-// }
-
 // type UserVarEvent struct {
 // 	NameLength uint32
 // 	Name       []byte

replication/parser.go

@@ -281,6 +281,8 @@ func (p *BinlogParser) parseEvent(h *EventHeader, data []byte, rawData []byte) (
 				e = ee
 			case PREVIOUS_GTIDS_EVENT:
 				e = &PreviousGTIDsEvent{}
+			case INTVAR_EVENT:
+				e = &IntVarEvent{}
 			default:
 				e = &GenericEvent{}
 			}