diff --git a/tencentdb/chain.go b/tencentdb/chain.go
index c89ec97..1989c8a 100644
--- a/tencentdb/chain.go
+++ b/tencentdb/chain.go
@@ -431,6 +431,14 @@ func (this *Query) Find() (map[string]string, error) {
 		log.Println("Err: no conn")
 	}
 
+	var connection_id int
+	err = conn.Query("select CONNECTION_ID()").Scan(&connection_id)
+	if err != nil {
+		log.Println("query connection id failed:", err)
+	} else {
+		log.Println("connection id:", connection_id)
+	}
+
 	_, row, err := GetRow(conn, this.dbname, this.table, this.alias, this.title, this.join,
 		this.where, this.where_or, this.value, this.orderby, this.debug)