Update 3.property-reference.md (#1109)

vesoft-inc · Oct 27, 2021 · 57d1f05 · 57d1f05
1 parent 12c676f
commit 57d1f05
Showing 1 changed file with 24 additions and 11 deletions.
diff --git a/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md b/docs-2.0/3.ngql-guide/4.variable-and-composite-queries/3.property-reference.md
@@ -60,29 +60,42 @@ $$.<tag_name>.<prop_name>
 
 ```ngql
 # 返回起始点的Tag player的name属性值和目的点的Tag player的age属性值。
-nebula> GO FROM "player100" OVER follow YIELD properties($^).name AS startName, properties($$).age AS endAge;
+nebula> GO FROM "player100" OVER follow YIELD $^.player.name AS startName, $$.player.age AS endAge;
 +--------------+--------+
 | startName | endAge |
 +--------------+--------+
 | "Tim Duncan" | 36 |
-| "Tim Duncan" | 33 |
+| "Tim Duncan" | 41 |
 +--------------+--------+
 
+
 # 返回Edge type follow的degree属性值。
-nebula> GO FROM "player100" OVER follow YIELD properties(edge).degree;
+nebula> GO FROM "player100" OVER follow YIELD follow.degree;
 +---------------+
 | follow.degree |
 +---------------+
 | 95 |
-| 90 |
+| 95 |
 +---------------+
 
 # 返回EdgeType 是 follow 的起始点 VID、目的点 VID、EdgeType 编码(正数为正向边，负数为逆向边)，和边的 rank 值。
-nebula> GO FROM "player100" OVER follow YIELD src(edge), dst(edge), type(edge), rank(edge);
-+-------------+-------------+------------+------------+
-| src(EDGE) | dst(EDGE) | type(EDGE) | rank(EDGE) |
-+-------------+-------------+------------+------------+
-| "player100" | "player101" | "follow" | 0 |
-| "player100" | "player125" | "follow" | 0 |
-+-------------+-------------+------------+------------+
+nebula> GO FROM "player100" OVER follow YIELD follow._src, follow._dst, follow._type, follow._rank;
++-------------+-------------+--------------+--------------+
+| follow._src | follow._dst | follow._type | follow._rank |
++-------------+-------------+--------------+--------------+
+| "player100" | "player101" | 17  | 0  |
+| "player100" | "player125" | 17  | 0  |
++-------------+-------------+--------------+--------------+
 ```
+
+!!! compatibility "历史版本兼容性"
+
+ Nebula Graph 2.6.0起支持了新的[Schema函数](../6.functions-and-expressions/4.schema.md)，以上示例中的语句在2.6.0版本中的写法如下。
+
+ ```ngql
+ GO FROM "player100" OVER follow YIELD properties($^).name AS startName, properties($$).age AS endAge;
+ GO FROM "player100" OVER follow YIELD properties(edge).degree;
+ GO FROM "player100" OVER follow YIELD src(edge), dst(edge), type(edge), rank(edge);
+ ```
+
+ 在2.6.0版本中Nebula Graph依然兼容旧语法。