Add where pattern (#2519)

* Update where.md * Update where.md
vesoft-inc · Jan 30, 2023 · cc1dd9b · cc1dd9b
1 parent 08dbe27
commit cc1dd9b
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diff --git a/docs-2.0/3.ngql-guide/8.clauses-and-options/where.md b/docs-2.0/3.ngql-guide/8.clauses-and-options/where.md
@@ -185,6 +185,30 @@ nebula> MATCH (v)-[e:follow]->() \
 ...
 ```
 
+### 过滤 pattern
+
+```ngql
+nebula> MATCH (v:player{name:"Tim Duncan"})-[e]->(t) \
+ WHERE (v)-[e]->(t:team) \
+ RETURN (v)-->();
+
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| (v)-->() = (v)-->() |
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| [<("player100" :player{age: 42, name: "Tim Duncan"})-[:serve@0 {end_year: 2016, start_year: 1997}]->("team204" :team{name: "Spurs"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player101" :player{age: 36, name: "Tony Parker"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player125" :player{age: 41, name: "Manu Ginobili"})>] |
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+
+nebula> MATCH (v:player{name:"Tim Duncan"})-[e]->(t) \
+ WHERE NOT (v)-[e]->(t:team) \
+ RETURN (v)-->();
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| (v)-->() = (v)-->() |
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+| [<("player100" :player{age: 42, name: "Tim Duncan"})-[:serve@0 {end_year: 2016, start_year: 1997}]->("team204" :team{name: "Spurs"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player101" :player{age: 36, name: "Tony Parker"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player125" :player{age: 41, name: "Manu Ginobili"})>] |
+| [<("player100" :player{age: 42, name: "Tim Duncan"})-[:serve@0 {end_year: 2016, start_year: 1997}]->("team204" :team{name: "Spurs"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player101" :player{age: 36, name: "Tony Parker"})>, <("player100" :player{age: 42, name: "Tim Duncan"})-[:follow@0 {degree: 95}]->("player125" :player{age: 41, name: "Manu Ginobili"})>] |
++------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
+```
+
 ## 过滤字符串
 
 在`WHERE`子句中使用`STARTS WITH`、`ENDS WITH`或`CONTAINS`可以匹配字符串的特定部分。匹配时区分大小写。