Neo4j

JB47394 · 08-31-2020

In a single query, how can I return both nodes that match an expression as well as nodes that don't match that expression? The specific situation I'm in is that I want two sets of nodes returned; one with a relationship and one without that relations...

JB47394 · 08-24-2020

If I have a bunch of nodes identified by a MATCH, how do I get the relationships between those nodes and only those nodes? The Neo4j browser shows this to me when it shows the nodes matched by a query, but I've been unable to duplicate it. I thought...

JB47394 · 08-31-2020

Thank you. The bits that I was missing were The use of EXISTS as a WITH expression (I've only done simple things with WITH)The use of the FOREACH pattern for conditional execution andrew.bowman: If using 4.1, you can use subqueries instead for ...

JB47394 · 08-24-2020

Yes, that's a much cleaner notation and it works just fine. Thank you. The resulting performance of the query is unchanged. I noted that when I PROFILE each style of query (mine with node labels and your queries without them), MATCH (n)-[r:TO]-(n2)...

JB47394 · 08-24-2020

Thank you a ton for going through the work to figure this out. It's much appreciated. This is what I ended up going with: MATCH <something that produces an n> WITH collect(id(n)) AS c MATCH (n:Topo) WHERE id(n) IN c MATCH (n2:Topo) WHERE id(n2) IN c...

JB47394 · 08-24-2020

tony.chiboucas: ...you just did. No, I have a query that returns the nodes. I don't have a means of referring to the relationships so that I can modify their attributes. That's the reason I'm here. tony.chiboucas: However, in this case,...

JB47394 · 08-24-2020

Well, here's the seven nodes connected by relationships, for whatever value that provides. The nodes are returned by the initial MATCH. The browser fills in the relationships. The node type is RecordTopology and the relationship is CONNECTED_TO.

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RETURN matching nodes and non-matching nodes

Return relationships connecting matched nodes

Re: RETURN matching nodes and non-matching nodes

Re: Return relationships connecting matched nodes

Re: Return relationships connecting matched nodes

Re: Return relationships connecting matched nodes

Re: Return relationships connecting matched nodes