Update 2.match.md

docs-2.0/3.ngql-guide/7.general-query-statements/2.match.md

@@ -555,6 +555,20 @@ nebula> MATCH (v1:player{name:"Tim Duncan"}), (v2:team{name:"Spurs"}) \
 +----------------------------------------------------+----------------------------------+
 ```
 
+### 匹配最短路径
+
+用户可以用 `shortestPath` 表示模式中的路径。
+
+```
+nebula> MATCH p = shortestPath((a:player)-[e:follow*..2]-(b:player))\
+        WHERE a.player.age >  45 AND b.player.age < 30 \
+        RETURN p;
++---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| p                                                                                                                                                                                                                         |
++---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| <("player144" :player{age: 47, name: "Shaquille O'Neal"})-[:follow@0 {degree: 80}]->("player100" :player{age: 42, name: "Tim Duncan"})<-[:follow@0 {degree: 99}]-("player113" :player{age: 29, name: "Dejounte Murray"})> |
++---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+```
 ## 多MATCH检索
 
 不同的模式有不同的筛选条件时，可以使用多`MATCH`，会返回模式完全匹配的行。