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[英]Neo4j - Graph Data Science library - How to cypher-query against a named graph in Graph Catalog?
[英]In Neo4j Graph Data Science, can I create graph by cypher with custom type name?
我從標簽節點創建圖表,其中創建的圖表中的關系不是來自原始數據庫的關系,而是一些代表標簽的路徑被標記在相同的視頻上。
CALL gds.graph.create.cypher(
"tags",
"MATCH (t:Tag) RETURN id(t) AS id, labels(t) AS labels",
"
MATCH (t:Tag)
WITH collect(t) as nodes
UNWIND nodes as n
UNWIND nodes as m
WITH n, m WHERE id(n) < id(m)
MATCH (n)-[:TAGGED_ON]->(v:Video)<-[:TAGGED_ON]-(m)
RETURN id(n) AS source, id(m) AS target, count(v) AS weight
"
)
然后我這樣做以導出到新數據庫:
CALL gds.graph.export("tags", {dbName: "tags"})
CREATE DATABASE tags
但是,新標簽數據庫中的關系將全部命名為__ALL__
。
在圖創建的relationshipQuery部分,neo4j的文檔說
可選地,可以指定類型列來表示關系類型。
但是,我發現的所有關於此的示例都是type(r) AS type
,這不適用於我的情況。 我仍然可以通過以下方式重命名新標簽數據庫中的關系:
MATCH ()-[r]->()
WITH collect(r) AS rels
CALL apoc.refactor.rename.type("__ALL__", "TAGGED_ON_THE_SAME_VIDEO", rels)
YIELD committedOperations
RETURN committedOperations
但是我可以在 gds 圖創建時使用自定義關系名稱嗎? 我嘗試了類似"TAGGED_ON_THE_SAME_VIDEO" AS type
東西,但這行不通。
我嘗試了類似“TAGGED_ON_THE_SAME_VIDEO”作為類型的東西,但這行不通。
為什么這行不通? 我已經測試過了,它工作得很好。 嘗試使用以下查詢來投影圖形:
CALL gds.graph.create.cypher(
"tags",
"MATCH (t:Tag) RETURN id(t) AS id, labels(t) AS labels",
"
MATCH (t:Tag)
WITH collect(t) as nodes
UNWIND nodes as n
UNWIND nodes as m
WITH n, m WHERE id(n) < id(m)
MATCH (n)-[:TAGGED_ON]->(v:Video)<-[:TAGGED_ON]-(m)
RETURN id(n) AS source, id(m) AS target, count(v) AS weight, 'TAGGED_ON_THE_SAME_VIDEO' as type
"
)
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