如何创建一个只返回两个节点之间某种类型的关系的查询?
例如:
MATCH (a)-[r:InteractsWith*..5]->(b) RETURN a,r,b
因为(a)可能与(b)多次相互作用,结果将包含两者之间的许多关系。但是,这种关系并不完全相同。它们具有不同的属性,因为它们发生在不同的时间点。
但是,如果您只对他们至少与进行过一次的互动感兴趣呢?
而不是result as it appears currently我希望收到的结果是:
我想到的一种方法是创建“hasEverInteractedWith”类型的新关系。但应该有另一种方式,对吗?
答案 0 :(得分:1)
使用<groupId>com.spring</groupId>
<artifactId>RegistrationWithSpringMvc</artifactId>
<packaging>war</packaging>
<version>0.0.1-SNAPSHOT</version>
<name>RegistrationWithSpringMvc</name>
<url>http://maven.apache.org</url>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-webmvc -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-webmvc</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-web -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/com.hynnet/oracle-driver-ojdbc6 -->
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc6</artifactId>
<version>11.2.0</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.springframework/spring-orm -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-orm</artifactId>
<version>4.3.2.RELEASE</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-entitymanager -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-entitymanager</artifactId>
<version>4.3.2.Final</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.hibernate/hibernate-validator -->
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-validator</artifactId>
<version>5.2.4.Final</version>
</dependency>
<dependency>
<groupId>org.hibernate</groupId>
<artifactId>hibernate-core</artifactId>
<version>5.2.0.Final</version>
</dependency>
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>servlet-api</artifactId>
<version>2.5</version>
<scope>provided</scope>
</dependency>
<!-- https://mvnrepository.com/artifact/javax.servlet/jstl -->
<dependency>
<groupId>javax.servlet</groupId>
<artifactId>jstl</artifactId>
<version>1.2</version>
</dependency>
<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>org.jboss.logging</groupId>
<artifactId>jboss-logging</artifactId>
<version>3.3.0.Final</version>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.0.2</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
</configuration>
</plugin>
</plugins>
</build>
获得最快的单个结果。
shortestPath()
如果你想获得一个特定的,你必须得到所有的MATCH (a)-[:InteractsWith*..5]->(b)
WITH DISTINCT a, b
MATCH p = shortestPath((a)-[:InteractsWith*..5]->(b))
RETURN a, b, RELATIONSHIPS(p) AS r
然后过滤它们,这将会更慢(但提供更多的上下文)。
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