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Update query profiles with new operator MergeInto #1419

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Merged
merged 3 commits into from
Nov 4, 2025
Merged

Update query profiles with new operator MergeInto #1419

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cd271ca
Update query profiles with new operator `MergeInto` https://github.co…
stefano-ottolenghi Nov 3, 2025
ff3e5fb
Alter query so that `LockingMerge` shows up again
stefano-ottolenghi Nov 3, 2025
5f9923e
Merge branch 'dev' into new-operator
stefano-ottolenghi Nov 3, 2025
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84 changes: 42 additions & 42 deletions modules/ROOT/pages/planning-and-tuning/operators/operators-detail.adoc
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Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,7 @@

Understanding the roles of different operators in an execution plan can be an important step in making queries more efficient.
This page contains details and examples for each of the operators used by the Cypher planner.
For an overview of how the Cypher planner uses operators, see xref:planning-and-tuning/execution-plans.adoc#reading-execution-plans[ Understanding execution plans -> Reading execution plans].
For an overview of how the Cypher planner uses operators, see xref:planning-and-tuning/execution-plans.adoc#reading-execution-plans[ Understanding execution plans -> Reading execution plans].

The operators are grouped into categories based on the role they fulfill in executing a Cypher query:

Expand Down Expand Up @@ -1180,7 +1180,7 @@ Total database accesses: 1, total allocated memory: 184
======

[[query-plan-directed-all-relationships-scan]]
=== Directed All Relationships Scan
=== Directed All Relationships Scan

The `DirectedAllRelationshipsScan` operator fetches all relationships and their start and end nodes in the database.

Expand Down Expand Up @@ -2588,7 +2588,7 @@ Allows Cypher to use xref:indexes/search-performance-indexes/using-indexes.adoc#
.Query
[source, cypher]
----
PROFILE
PROFILE
WITH "Person" AS label
MATCH (people:$(label))
RETURN people.name
Expand Down Expand Up @@ -2634,7 +2634,7 @@ Allows Cypher to use xref:indexes/search-performance-indexes/using-indexes.adoc#
.Query
[source, cypher]
----
PROFILE
PROFILE
WITH "FRIENDS_WITH" AS relType
MATCH ()-[r:$(relType)]->()
RETURN count(r) as relCount
Expand Down Expand Up @@ -2680,7 +2680,7 @@ Allows Cypher to use xref:indexes/search-performance-indexes/using-indexes.adoc#
.Query
[source, cypher]
----
PROFILE
PROFILE
WITH "FRIENDS_WITH" AS relType
MATCH ()-[r:$(relType)]-()
RETURN count(r) as relCount
Expand Down Expand Up @@ -3379,23 +3379,23 @@ Runtime version {neo4j-version}

Batch size 128

+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline |
+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| +ProduceResults | 0 | | 1 | 0 | 0 | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| +EmptyResult | 1 | | 1 | 0 | 0 | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| +Apply | 2 | | 1 | 1 | 0 | | | | |
| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +LockingMerge | 3 | CREATE (s)-[anon_0:FRIENDS_WITH]->(s), LOCK(s) | 1 | 1 | 1 | | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(s) | 0 | 0 | 10 | 904 | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +Argument | 5 | s | 1 | 3 | 0 | 2280 | 2/0 | 0.460 | Fused in Pipeline 1 |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| +NodeIndexSeek | 6 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 1 | 1 | 2 | 376 | 1/0 | 0.211 | In Pipeline 0 |
+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline | Indexes Used |
+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| +ProduceResults | 0 | | 1 | 0 | 0 | 0 | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| +EmptyResult | 1 | | 1 | 0 | 0 | | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| +Apply | 2 | | 1 | 0 | 0 | | | | | |
| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +ArgumentTracker | 6 | | 1 | 0 | 0 | 736 | | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +MergeInto | 3 | MERGE (s)-[anon_0:FRIENDS_WITH]->(s) | 1 | 1 | 1 | | | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +Argument | 4 | s | 1 | 1 | 0 | 2288 | 1/0 | 1.626 | Fused in Pipeline 1 | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| +NodeIndexSeek | 5 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 1 | 1 | 2 | 376 | 1/0 | 0.300 | In Pipeline 0 | range_person_name: 1 |
+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+

Total database accesses: 15, total allocated memory: 2232
----
Expand Down Expand Up @@ -6022,7 +6022,7 @@ The `LockingMerge` operator is similar to the xref:planning-and-tuning/operators
----
PROFILE
MATCH (s:Person {name: 'me'})
MERGE (s)-[:FRIENDS_WITH]->(s)
MERGE (s)-[:FRIENDS_WITH]->(:Person {name: 'you'})
----

.Query Plan
Expand All @@ -6036,25 +6036,25 @@ Runtime version {neo4j-version}

Batch size 128

+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline |
+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| +ProduceResults | 0 | | 1 | 0 | 0 | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| +EmptyResult | 1 | | 1 | 0 | 0 | | | | |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| +Apply | 2 | | 1 | 1 | 0 | | | | |
| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +LockingMerge | 3 | CREATE (s)-[anon_0:FRIENDS_WITH]->(s), LOCK(s) | 1 | 1 | 1 | | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(s) | 0 | 0 | 10 | 904 | | | |
| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
| | +Argument | 5 | s | 1 | 3 | 0 | 2280 | 2/0 | 0.460 | Fused in Pipeline 1 |
| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
| +NodeIndexSeek | 6 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 1 | 1 | 2 | 376 | 1/0 | 0.211 | In Pipeline 0 |
+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline | Indexes Used |
+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| +ProduceResults | 0 | | 0 | 0 | 0 | | | | | |
| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| +EmptyResult | 1 | | 0 | 0 | 0 | | | | | |
| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| +Apply | 2 | | 0 | 0 | 0 | | | | | |
| |\ +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +LockingMerge | 3 | CREATE (anon_1:Person {name: $autostring_1}), (s)-[anon_0:FRIENDS_WITH]->(anon_1), LOCK(s) | 0 | 0 | 0 | | | | | |
| | | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(anon_1) | 0 | 0 | 0 | | | | | |
| | | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
| | +NodeIndexSeek | 5 | RANGE INDEX anon_1:Person(name) WHERE name = $autostring_1 | 0 | 0 | 0 | 128 | 0/0 | 0.000 | Fused in Pipeline 1 | |
| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
| +NodeIndexSeek | 6 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 0 | 0 | 1 | 376 | 1/0 | 0.186 | In Pipeline 0 | range_person_name: 1 |
+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+

Total database accesses: 15, total allocated memory: 2232
Total database accesses: 1, total allocated memory: 584
----

======
Expand Down Expand Up @@ -7297,4 +7297,4 @@ Runtime version {neo4j-version}
Total database accesses: 0, total allocated memory: 64
----

======
======