Logical OR for relationship MATCH

[jackboyla]

supports MATCH (n)-[r:colleague|friend]->(m)
plus some tests for it

from grandcypher import GrandCypher
import networkx as nx

host = nx.MultiDiGraph()
host.add_node("a", name="Alice", age=25)
host.add_node("b", name="Bob", age=30)
host.add_node("c", name="Christine", age=30)
host.add_node("d", name="Derek", age=57)
host.add_edge("a", "b", __labels__={"friend"}, years=1, friendly="very")
host.add_edge("b", "a", __labels__={"colleague"}, years=2)
host.add_edge("b", "a", __labels__={"mentor"}, years=4)
host.add_edge("b", "c", __labels__={"chef"}, years=12)
host.add_edge("d", "b", __labels__={"friend"}, years=1, friendly="mildly")

qry = """
MATCH (n)-[r:colleague|friend]->(m)
RETURN n.name, m.name, r.__labels__, r.years, r.friendly
"""
res = GrandCypher(host).run(qry)
print(res)

'''
{
    'n.name': ['Alice', 'Bob', 'Derek'], 
    'm.name': ['Bob', 'Alice', 'Bob'], 
    'r.__labels__': [
        {0: {'friend'}}, {0: {'colleague'}, 1: {'mentor'}}, {0: {'friend'}}
    ], 
    'r.years': [{0: 1}, {0: 2, 1: 4}, {0: 1}], 
    'r.friendly': [{0: 'very'}, {0: None, 1: None}, {0: 'mildly'}]
}
'''

[j6k4m8]

I can't quite tell for my phone but I'll look at this might need to be rebased on latest trunk?

this is so cool — I had no idea cypher could do this!

[jackboyla]

you're right! I just rebased 😄 yeah it's kind of niche and not really necessary (could just use WHERE) but it's nice to have

[j6k4m8]

totally, this is super nice to have! and the closer we can get to feature parity with the cypher spec the better, imo! every feature is great :)