14.6.1.3 Using Strings as Vertex Identifiers

By default, integer vertex IDs are used to identify a vertex. But, the type of the vertex ID can also be a long or a string.

In order to implement this, you must specify the vertex ID type when creating the graph using the GraphBuilder as shown:

• JShell
• Java
• Python

opg4j> GraphBuilder<String> builder = session.createGraphBuilder(IdType.STRING)
opg4j> builder.addVertex("vertex 1").setProperty("double-prop", 0.1)
opg4j> builder.addVertex("vertex 2").setProperty("double-prop", 2.0)
opg4j> builder.addVertex("vertex 3").setProperty("double-prop", 0.3)
opg4j> builder.addVertex("vertex 4").setProperty("double-prop", 4.56789)
opg4j> builder.addEdge("vertex 1", "vertex 2")
opg4j> builder.addEdge("vertex 2", "vertex 3")
opg4j> builder.addEdge("vertex 2", "vertex 4")
opg4j> builder.addEdge("vertex 3", "vertex 4")
opg4j> builder.addEdge("vertex 4", "vertex 2")

opg4j> var graph = builder.build()

import oracle.pgx.api.*;
import oracle.pgx.common.types.IdType;

PgxSession session = Pgx.createSession("example");
GraphBuilder<String> builder = session.createGraphBuilder(IdType.STRING);

builder.addVertex("vertex 1").setProperty("double-prop", 0.1);
builder.addVertex("vertex 2").setProperty("double-prop", 2.0);
builder.addVertex("vertex 3").setProperty("double-prop", 0.3);
builder.addVertex("vertex 4").setProperty("double-prop", 4.56789);

builder.addEdge("vertex 1", "vertex 2");
builder.addEdge("vertex 2", "vertex 3");
builder.addEdge("vertex 2", "vertex 4");
builder.addEdge("vertex 3", "vertex 4");
builder.addEdge("vertex 4", "vertex 2");

PgxGraph graph = builder.build();

from pypgx import get_session

session = get_session(session_name="example")
builder = session.create_graph_builder(id_type='string')
builder.add_vertex("vertex 1").set_property("double-prop", 0.1)
builder.add_vertex("vertex 2").set_property("double-prop", 2.0)
builder.add_vertex("vertex 3").set_property("double-prop", 0.3)
builder.add_vertex("vertex 4").set_property("double-prop", 4.56789)

builder.add_edge("vertex 1", "vertex 2")
builder.add_edge("vertex 2", "vertex 3")
builder.add_edge("vertex 2", "vertex 4")
builder.add_edge("vertex 3", "vertex 4")
builder.add_edge("vertex 4", "vertex 2")

graph = builder.build()