Update 3.property-reference.md

vesoft-inc · Nov 1, 2021 · 3f82437 · 3f82437
1 parent e996f22
commit 3f82437
Showing 1 changed file with 23 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
@@ -61,35 +61,47 @@ Apart from the user-defined edge property, there are four built-in properties in
 The following query returns the `name` property of the `player` tag on the source vertex and the `age` property of the `player` tag on the destination vertex.
 
 ```ngql
-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     |
 +--------------+--------+
 ```
 
 The following query returns the `degree` property of the edge type `follow`.
 
 ```ngql
-nebula> GO FROM "player100" OVER follow YIELD properties(edge).degree;
+nebula> GO FROM "player100" OVER follow YIELD follow.degree;
 +---------------+
 | follow.degree |
 +---------------+
 | 95            |
-| 90            |
+| 95            |
 +---------------+
 ```
 
 The following query returns the source vertex, the destination vertex, the edge type, and the edge rank value of the edge type `follow`.
 
 ```ngql
-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 "Legacy version compatibility"
+
+    Nebula Graph 2.6.0 and later versions support the new [Schema function](../6.functions-and-expressions/4.schema.md). The statements in the above examples are written as follows in 2.6.0.
+
+    ```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);
+    ```
+
+    In 2.6.0, Nebula Graph is still compatible with the old syntax.