How to create index on AgensGraph?

Question

When traverse vertex or egde, It is very slow.

I want to create index for accelerating speed.

# match (n:v{id:1}) return n;
        n        
-----------------
 v[3.1]{"id": 1}
(1 row)

Time: 693.100 ms

How can I create index for vertex or edge?

Answer 1

Use "CREATE PROPERTY INDEX" statement for create index on graph object.

# match (n:v{id:1}) return n;
        n        
-----------------
 v[3.1]{"id": 1}
(1 row)

Time: 693.100 ms
# create property index on v ( id );
CREATE PROPERTY INDEX
Time: 2227.147 ms
# match (n:v{id:1}) return n;
        n        
-----------------
 v[3.1]{"id": 1}
(1 row)

Time: 5.935 ms

In this case, accelerated over than hundred times.

Answer 2

• Creating Index

  agens=> CREATE PROPERTY INDEX ON [VERTEX OR EDGE LABEL] ([PROPERTY]) agens=> CREATE PROPERTY INDEX ON CUSTOMER (AGE)

• Creating Unique Index (Allow only one edge between two vertices)

  agens=> CREATE UNIQUE INDEX [INDEX NAME] ON [GRAPH_PATH.VERTEX OR EDGE LABEL] ([PROPERTIES]) agens=> CREATE UNIQUE INDEX STUDENT_UNIQ_INDEX ON [AGENS_GRAPH.CUSTOMER] ("start", "end")

• Creating Unique Constraint

  agens=> CREATE CONSTRAINT ON [VERTEX OR EDGE LABEL] [PROPERTY] IS UNIQUE agens=> CREATE CONSTRAINT ON CUSTOMER CUSTOMER_ID IS UNIQUE