canal能否支持存储过程，trigger，索引等DDL的Query传递

[chj733]

sync.go里面
1.目前对于存储过程，触发器等对象的DDL，因为parser无法解析，是直接忽略的，能否至少继续传递event？
我下游收到这个DDL query还是有用的
2.能否针对DDL，带上schema信息？

[afghanistanyn]

	for _, stmt := range stmts {
		nodes := parseStmt(stmt)
		for _, node := range nodes {
			if node.db == "" {
				node.db = string(e.Schema)
			}
			if err = c.updateTable(ev.Header, node.db, node.table); err != nil {
				return errors.Trace(err)
			}
		}
                // if len(nodes) > 0
		if len(nodes) >= 0 {
			savePos = true
			force = true
			// Now we only handle Table Changed DDL, maybe we will support more later.
			if err = c.eventHandler.OnDDL(ev.Header, pos, e); err != nil {
				return errors.Trace(err)
			}
		}
	}

change the len(nodes) >= 0 will always receive the ddl, or you can update parseStmt() to add the ddl type you want