openCypher: Syntax and Semantics for Multiple Graphs

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Lead openCypher Language Group (CLG)
Neo Technology

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● RETURN
● MATCH (a)-[r]->(b)
● WITH
● THEN

RETURN => ...

RETURN => LOAD GRAPH

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LOAD GRAPH AT "graph://graphology.com/europe/uk"

MATCH => ...

MATCH => RETURN GRAPH
RETURN GRAPH

MATCH (a)-->(b) WITH a, b ...

WITH a, r, b RETURN GRAPH FROM (a)-[r]->(b) ...

MATCH RETURN GRAPH FROM
p=(a)-[r]->(b) p=(a)-[r]->(b)
p=...
p

MATCH g=(a)-[r]->(b) + (c) + (d)-[r2]->(c)
g GRAPHLET PATH GRAPHLET
● g1+g2
● g1-g2
● g1&g2
● g1^g2
● annotation: g {:Label prop: 12}

MATCH g=(a)-[r]->(b) + (c) + (d)-[r2]->(c)
g
● union(g)
● g)
● ...

RETURN GRAPH FROM <pat>
RETURN GRAPH FROM THROUGH
GRAPH FROM { CREATE () ... }

MATCH (c:City {name: "London"})
MATCH (c)<-[:LIVES_IN]-(a)-[:LOVES]-(b)-[:LIVES_IN]->(c)
WITH GRAPH FROM (x)-[:KNOWS]-(y)
WHERE NOT EXISTS { (x)-[:LOVES]-(y) }
MATCH (a)-(single_friend)-(b)
RETURN *

● RETURN * THEN ...
●

RETURN GRAPH
● UNION GRAPH
● INTERSECT GRAPH
● EXCLUSIVE UNION GRAPH
●

● LOAD GRAPH AT
● WITH GRAPH FROM THROUGH
● RETURN GRAPH FROM THROUGH
● RETURN WITH GRAPH

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● GRAPH AT "url"
● GRAPH FROM <pat> THROUGH <pat-aggr>
● EMPTY GRAPH
● CURRENT GRAPH
● DEFAULT GRAPH
●

CREATE GRAPH <MyGraph:Label {name: 15}>
AT "url"
FROM g=(a)-[r]->(b)
THROUGH union(g)
ADD/MOVE GRAPH g TO "url"
REMOVE GRAPH g FROM "url"
DELETE GRAPH g
"Big"
Graph

MATCH GRAPH <MyGraph:Label {name: 15}> ...
WITH GRAPH <MyGraph:Label {name: 15}> FROM ... THROUGH ...
LOAD GRAPH MyGraph ADD TO GRAPH ...
MATCH IN GRAPH ... REMOVE FROM GRAPH ...
SET MyGraph.name = 15 ADD MyGraph:SocialNetwork
REMOVE MyGraph.name REMOVE MyGraph:Experiment

● MATCH g=... g
● MATCH GRAPH <G>
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SQL

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openCypher: Syntax and Semantics for Multiple Graphs

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