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apoc.graph.fromCypher

此过程返回只能由其他 APOC 过程访问的虚拟节点和关系。更多信息请参见虚拟节点与关系 (图投影)。

此过程不被认为是多线程安全运行的。因此，并行运行时不支持此过程。更多信息请参见 Cypher 手册 → 并行运行时。

详情
语法	`apoc.graph.fromCypher(statement, params, name, props) :: (graph)`
描述	通过从给定 Cypher 语句返回的数据中提取所有 `NODE` 和 `RELATIONSHIP` 值来生成一个虚拟子图。
输入参数	名称	类型	描述
	`statement`	`STRING`	用于创建图的 Cypher 语句。
	`params`	`MAP`	给定 Cypher 语句的参数。
	`name`	`STRING`	结果图的名称。
	`props`	`MAP`	要包含在结果图中的属性。
返回参数	名称	类型	描述
返回参数	`graph`	`MAP`	结果图。

使用示例

本节中的示例基于以下示例图

CREATE (TheMatrix:Movie {title:'The Matrix', released:1999, tagline:'Welcome to the Real World'})
CREATE (Keanu:Person {name:'Keanu Reeves', born:1964})
CREATE (Carrie:Person {name:'Carrie-Anne Moss', born:1967})
CREATE (Laurence:Person {name:'Laurence Fishburne', born:1961})
CREATE (Hugo:Person {name:'Hugo Weaving', born:1960})
CREATE (LillyW:Person {name:'Lilly Wachowski', born:1967})
CREATE (LanaW:Person {name:'Lana Wachowski', born:1965})
CREATE (JoelS:Person {name:'Joel Silver', born:1952})
CREATE
(Keanu)-[:ACTED_IN {roles:['Neo']}]->(TheMatrix),
(Carrie)-[:ACTED_IN {roles:['Trinity']}]->(TheMatrix),
(Laurence)-[:ACTED_IN {roles:['Morpheus']}]->(TheMatrix),
(Hugo)-[:ACTED_IN {roles:['Agent Smith']}]->(TheMatrix),
(LillyW)-[:DIRECTED]->(TheMatrix),
(LanaW)-[:DIRECTED]->(TheMatrix),
(JoelS)-[:PRODUCED]->(TheMatrix);

CALL apoc.graph.fromCypher(
  'MATCH (p:Person)-[r:DIRECTED]->(m:Movie) RETURN *',
  {},
  'directors',
  {description: "Virtual Graph of all directorships"}
)
YIELD graph AS g
RETURN g;

结果
g
{name: "directors", relationships: [[:DIRECTED], [:DIRECTED]], nodes: [(:Movie {tagline: "Welcome to the Real World", title: "The Matrix", released: 1999}), (:Person {name: "Lilly Wachowski", born: 1967}), (:Person {name: "Lana Wachowski", born: 1965})], properties: {description: "Virtual Graph of all directorships"}}

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