Source and destination predicates

Syntax only

The GQL parser accepts this form. The database does not currently execute it. The example below demonstrates grammar, not a runnable query feature.

MATCH (a)-[e]->(b) WHERE a IS SOURCE OF e AND b IS DESTINATION OF e RETURN e;

IS NOT SOURCE OF and IS NOT DESTINATION OF are accepted as well. Executable directed MATCH patterns already constrain endpoint roles; use pattern direction for current queries.

See supported features for executable alternatives.