apoc.schema.node.constraintExists
Function
apoc.schema.node.constraintExists(labelName STRING, propertyName LIST<STRING>)
- returns a BOOLEAN
depending on whether or not a constraint exists for the given NODE
label with the given property names.
This function is not considered safe to run from multiple threads. It is therefore not supported by the parallel runtime (introduced in Neo4j 5.13). For more information, see the Cypher Manual → Parallel runtime. |
Signature
apoc.schema.node.constraintExists(labelName :: STRING, propertyName :: LIST<STRING>) :: BOOLEAN
Usage Examples
The examples in this section are based on a database that has applied the following constraints:
CREATE CONSTRAINT personName FOR (person:Person)
REQUIRE person.name IS UNIQUE;
CREATE CONSTRAINT userId FOR (user:User)
REQUIRE user.id IS UNIQUE;
RETURN apoc.schema.node.constraintExists("Person", ["name"]) AS output;
output |
---|
TRUE |
RETURN apoc.schema.node.constraintExists("Person", ["name", "id"]) AS output;
output |
---|
FALSE |