Merge pull request #139 from ldbc/neo4jv5

Cypher: Bump Neo4j version to v5.1

cypher/ddl/indices.cypher

@@ -1,21 +1,21 @@
 // uniqueness constrains (implying an index)
-CREATE CONSTRAINT ON (n:City)         ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Comment)      ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Country)      ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Forum)        ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Message)      ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Organisation) ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Person)       ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Post)         ASSERT n.id IS UNIQUE;
-CREATE CONSTRAINT ON (n:Tag)          ASSERT n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:City)         REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Comment)      REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Country)      REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Forum)        REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Message)      REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Organisation) REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Person)       REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Post)         REQUIRE n.id IS UNIQUE;
+CREATE CONSTRAINT FOR (n:Tag)          REQUIRE n.id IS UNIQUE;
 
 // name/firstName
-CREATE INDEX ON :Country(name);
-CREATE INDEX ON :Person(firstName);
-CREATE INDEX ON :Tag(name);
-CREATE INDEX ON :TagClass(name);
+CREATE INDEX FOR (n:Country)   ON n.name;
+CREATE INDEX FOR (n:Person)    ON n.firstName;
+CREATE INDEX FOR (n:Tag)       ON n.name;
+CREATE INDEX FOR (n:TagClass)  ON n.name;
 
 // creationDate
-CREATE INDEX ON :Message(creationDate);
-CREATE INDEX ON :Post(creationDate);
-CREATE INDEX ON :Forum(creationDate);
+CREATE INDEX FOR (n:Message)   ON n.creationDate;
+CREATE INDEX FOR (n:Post)      ON n.creationDate;
+CREATE INDEX FOR (n:Forum)     ON n.creationDate;