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sensitivity of function name #637

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Jun 23, 2021
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sensitivity of function name #637

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14 changes: 13 additions & 1 deletion docs-2.0/3.ngql-guide/1.nGQL-overview/identifier-case-sensitivity.md
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Original file line number Diff line number Diff line change
Expand Up @@ -19,4 +19,16 @@ nebula> show spaces;
nebula> SHOW SPACES;
nebula> SHOW spaces;
nebula> show SPACES;
```
```

## 函数不区分大小写

函数名称不区分大小写，例如`count()`、`COUNT()`、`couNT()`是等价的。

```ngql
nebula> WITH [NULL, 1, 1, 2, 2] As a UNWIND a AS b RETURN count(b), COUNT(*), couNT(DISTINCT b);
+----------+----------+-------------------+
| count(b) | COUNT(*) | couNT(distinct b) |
+----------+----------+-------------------+
| 4 | 5 | 2 |
+----------+----------+-------------------+
2 changes: 1 addition & 1 deletion ....0/3.ngql-guide/15.full-text-index-statements/1.search-with-text-based-index.md
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Expand Up @@ -115,7 +115,7 @@ nebula> LOOKUP ON player WHERE WILDCARD(player.name, "*ri*") YIELD player.name,

nebula> LOOKUP ON player WHERE WILDCARD(player.name, "*ri*") | YIELD count(*);
+----------+
| COUNT(*) |
| count(*) |
+----------+
| 3 |
+----------+
Expand Down
8 changes: 4 additions & 4 deletions docs-2.0/3.ngql-guide/6.functions-and-expressions/10.collect.md
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Expand Up @@ -22,15 +22,15 @@ nebula> UNWIND [1, 2, 1] AS a \
nebula> UNWIND [1, 2, 1] AS a \
RETURN collect(a);
+------------+
| COLLECT(a) |
| collect(a) |
+------------+
| [1, 2, 1] |
+------------+

nebula> UNWIND [1, 2, 1] AS a \
RETURN a, collect(a), size(collect(a));
+---+------------+------------------+
| a | COLLECT(a) | size(COLLECT(a)) |
| a | collect(a) | size(COLLECT(a)) |
+---+------------+------------------+
| 2 | [2] | 1 |
+---+------------+------------------+
Expand All @@ -43,7 +43,7 @@ nebula> UNWIND ["c", "b", "a", "d" ] AS p \
ORDER BY q DESC LIMIT 3 \
RETURN collect(q);
+-----------------+
| COLLECT(q) |
| collect(q) |
+-----------------+
| ["d", "c", "b"] |
+-----------------+
Expand All @@ -61,7 +61,7 @@ nebula> WITH [1, 1, 2, 2] AS coll \
nebula> MATCH (n:player) \
RETURN collect(n.age);
+---------------------------------------------------------------+
| COLLECT(n.age) |
| collect(n.age) |
----------------------------------------------------------------+
| [32, 32, 34, 29, 41, 40, 33, 25, 40, 37, ...
...
Expand Down
12 changes: 6 additions & 6 deletions docs-2.0/3.ngql-guide/6.functions-and-expressions/7.count.md
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Expand Up @@ -24,7 +24,7 @@ count({expr | *})
nebula> WITH [NULL, 1, 1, 2, 2] As a UNWIND a AS b \
RETURN count(b), count(*), count(DISTINCT b);
+----------+----------+-------------------+
| COUNT(b) | COUNT(*) | COUNT(distinct b) |
| count(b) | count(*) | count(distinct b) |
+----------+----------+-------------------+
| 4 | 5 | 2 |
+----------+----------+-------------------+
Expand All @@ -36,7 +36,7 @@ nebula> GO FROM "player101" OVER follow BIDIRECT \
YIELD $$.player.name AS Name \
| GROUP BY $-.Name YIELD $-.Name, count(*);
+---------------------+----------+
| $-.Name | COUNT(*) |
| $-.Name | count(*) |
+---------------------+----------+
| "Dejounte Murray" | 1 |
+---------------------+----------+
Expand All @@ -56,9 +56,9 @@ nebula> GO FROM "player101" OVER follow BIDIRECT \

- `$-.Name`：查询结果包含的姓名。

- `COUNT(*)`：姓名出现的次数。
- `count(*)`：姓名出现的次数。

因为测试数据集`basketballplayer`中没有重复的姓名，`COUNT(*)`列中数字`2`表示该行的人和`player101`是互相`follow`的关系。
因为测试数据集`basketballplayer`中没有重复的姓名，`count(*)`列中数字`2`表示该行的人和`player101`是互相`follow`的关系。

```ngql
# 方法一：统计数据库中的年龄分布情况。
Expand Down Expand Up @@ -107,7 +107,7 @@ nebula> MATCH (n:player) \
nebula> MATCH (v:player{name:"Tim Duncan"}) -- (v2) \
RETURN count(DISTINCT v2);
+--------------------+
| COUNT(distinct v2) |
| count(distinct v2) |
+--------------------+
| 11 |
+--------------------+
Expand All @@ -116,7 +116,7 @@ nebula> MATCH (v:player{name:"Tim Duncan"}) -- (v2) \
nebula> MATCH (n:player {name : "Tim Duncan"})-[]->(friend:player)-[]->(fof:player) \
RETURN count(fof), count(DISTINCT fof);
+------------+---------------------+
| COUNT(fof) | COUNT(distinct fof) |
| count(fof) | count(distinct fof) |
+------------+---------------------+
| 4 | 3 |
+------------+---------------------+
Expand Down
4 changes: 2 additions & 2 deletions docs-2.0/3.ngql-guide/7.general-query-statements/2.match.md
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Expand Up @@ -443,7 +443,7 @@ nebula> MATCH p=(v:player{name:"Tim Duncan"})-[e:follow*1..3]->(v2) \
nebula> MATCH p=(v:player{name:"Tim Duncan"})-[e:follow*1..3]->(v2:player) \
RETURN DISTINCT v2 AS Friends, count(v2);
+-----------------------------------------------------------+-----------+
| Friends | COUNT(v2) |
| Friends | count(v2) |
+-----------------------------------------------------------+-----------+
| ("player125" :player{age: 41, name: "Manu Ginobili"}) | 3 |
+-----------------------------------------------------------+-----------+
Expand All @@ -461,7 +461,7 @@ nebula> MATCH p=(v:player{name:"Tim Duncan"})-[e:follow*1..3]->(v2:player) \
nebula> MATCH p=(v:player{name:"Tim Duncan"})-[e:follow*0..3]->(v2:player) \
RETURN DISTINCT v2 AS Friends, count(v2);
+-----------------------------------------------------------+-----------+
| Friends | COUNT(v2) |
| Friends | count(v2) |
+-----------------------------------------------------------+-----------+
| ("player125" :player{age: 41, name: "Manu Ginobili"}) | 3 |
+-----------------------------------------------------------+-----------+
Expand Down
4 changes: 2 additions & 2 deletions docs-2.0/3.ngql-guide/7.general-query-statements/7.unwind.md
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Expand Up @@ -43,7 +43,7 @@ nebula> WITH [1,1,2,2,3,3] AS n \
ORDER BY r \
RETURN collect(r);
+------------+
| COLLECT(r) |
| collect(r) |
+------------+
| [1, 2, 3] |
+------------+
Expand All @@ -63,7 +63,7 @@ nebula> MATCH p=(v:player{name:"Tim Duncan"})--(v2) \
WITH DISTINCT r AS r \
RETURN collect(r);
+----------------------------------------------------------------------------------------------------------------------+
| COLLECT(r) |
| collect(r) |
+----------------------------------------------------------------------------------------------------------------------+
| [("player100" :player{age: 42, name: "Tim Duncan"}), ("player101" :player{age: 36, name: "Tony Parker"}),
("team204" :team{name: "Spurs"}), ("player102" :player{age: 33, name: "LaMarcus Aldridge"}),
Expand Down
2 changes: 1 addition & 1 deletion docs-2.0/3.ngql-guide/8.clauses-and-options/with.md
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Expand Up @@ -111,7 +111,7 @@ nebula> MATCH (v:player) \
LIMIT 3 \
RETURN collect(Name);
+-----------------------------------------------+
| COLLECT(Name) |
| collect(Name) |
+-----------------------------------------------+
| ["Yao Ming", "Vince Carter", "Tracy McGrady"] |
+-----------------------------------------------+
Expand Down