apoc.lock.allProcedure
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This procedure is not considered safe to run from multiple threads. It is therefore not supported by the parallel runtime. For more information, see the Cypher Manual → Parallel runtime. |
Syntax |
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Description |
Acquires a write lock on the given |
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Input arguments |
Name |
Type |
Description |
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The list of nodes to acquire a write lock on. |
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The list of relationships to acquire a write lock on. |
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Example
Given this dataset:
CREATE (:Person {name: 'Alice', age: 30})-[:KNOWS {since: 2019}]->(:Person {name: 'Bob', age: 25})The following query acquires write locks on both nodes and the relationship in a single call before updating their properties:
MATCH (a:Person {name: 'Alice'})-[r:KNOWS]->(b:Person {name: 'Bob'})
CALL apoc.lock.all([a, b], [r])
SET a.age = 31, b.age = 26, r.since = 2020
RETURN a.name AS aName, a.age AS aAge, b.name AS bName, b.age AS bAge, r.since AS since| aName | aAge | bName | bAge | since |
|---|---|---|---|---|
"Alice" |
31 |
"Bob" |
26 |
2020 |
apoc.lock.all is equivalent to calling apoc.lock.nodes and apoc.lock.rels in sequence.
Either list can be empty if only one entity type needs to be locked.