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allow-expression-like-return-v.tag #2781

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May 26, 2023
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allow-expression-like-return-v.tag #2781

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abby-cyber May 22, 2023
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Update return.md
abby-cyber May 22, 2023
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26 changes: 15 additions & 11 deletions docs-2.0/3.ngql-guide/8.clauses-and-options/return.md
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Expand Up @@ -60,7 +60,7 @@ nebula> RETURN {zage: 32, name: "Marco Belinelli"};

```ngql
// 返回点
nebula> MATCH (v:player) \
nebula> MATCH (v:player) \
RETURN v;
+---------------------------------------------------------------+
| v |
Expand Down Expand Up @@ -129,22 +129,27 @@ nebula> MATCH (v:player{name:"Tim Duncan"}) \

## 返回属性

使用语法`<vertex_name>.<tag_name>.<property_name>`返回点的属性；使用语法`<edge_name>.<property_name>`返回边的属性。
返回点的属性时，必需指定属性所属的 Tag，因为点可以有多个 Tag，并且同一个属性名可以在不同的 Tag 上出现。

支持指定点的 Tag 返回该 Tag 的所有属性；也支持指定点的 Tag 和某个属性名，返回该 Tag 的指定属性。


```ngql
// 返回点的属性
nebula> MATCH (v:player) \
RETURN v.player.name, v.player.age \
RETURN v.player, v.player.name, v.player.age \
LIMIT 3;
+------------------+--------------+
| v.player.name | v.player.age |
+------------------+--------------+
| "Danny Green" | 31 |
| "Tiago Splitter" | 34 |
| "David West" | 38 |
+------------------+--------------+
+--------------------------------------+---------------------+--------------+
| v.player | v.player.name | v.player.age |
+--------------------------------------+---------------------+--------------+
| {age: 33, name: "LaMarcus Aldridge"} | "LaMarcus Aldridge" | 33 |
| {age: 25, name: "Kyle Anderson"} | "Kyle Anderson" | 25 |
| {age: 40, name: "Kobe Bryant"} | "Kobe Bryant" | 40 |
+--------------------------------------+---------------------+--------------+
```

返回边的属性时，无需指定属性所属的 Edge type，因为边只能有一个 Edge type。

```ngql
// 返回边的属性
nebula> MATCH (v:player{name:"Tim Duncan"})-[e]->() \
Expand All @@ -158,7 +163,6 @@ nebula> MATCH (v:player{name:"Tim Duncan"})-[e]->() \
+--------------+----------+
```


使用`properties()`函数返回点或边的所有属性。

```ngql
Expand Down