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Update query profiles with new operator MergeInto (#1419)
results of neo-technology/neo4j#33348
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‎modules/ROOT/pages/planning-and-tuning/operators/operators-detail.adoc‎

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Understanding the roles of different operators in an execution plan can be an important step in making queries more efficient.
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This page contains details and examples for each of the operators used by the Cypher planner.
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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].
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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].
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The operators are grouped into categories based on the role they fulfill in executing a Cypher query:
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======
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[[query-plan-directed-all-relationships-scan]]
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=== Directed All Relationships Scan
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=== Directed All Relationships Scan
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The `DirectedAllRelationshipsScan` operator fetches all relationships and their start and end nodes in the database.
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@@ -2588,7 +2588,7 @@ Allows Cypher to use xref:indexes/search-performance-indexes/using-indexes.adoc#
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.Query
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[source, cypher]
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----
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PROFILE
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PROFILE
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WITH "Person" AS label
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MATCH (people:$(label))
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RETURN people.name
@@ -2634,7 +2634,7 @@ Allows Cypher to use xref:indexes/search-performance-indexes/using-indexes.adoc#
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.Query
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[source, cypher]
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----
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PROFILE
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PROFILE
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WITH "FRIENDS_WITH" AS relType
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MATCH ()-[r:$(relType)]->()
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RETURN count(r) as relCount
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.Query
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[source, cypher]
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----
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PROFILE
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PROFILE
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WITH "FRIENDS_WITH" AS relType
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MATCH ()-[r:$(relType)]-()
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RETURN count(r) as relCount
@@ -3379,23 +3379,23 @@ Runtime version {neo4j-version}
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Batch size 128
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline |
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| +ProduceResults | 0 | | 1 | 0 | 0 | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| +EmptyResult | 1 | | 1 | 0 | 0 | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| +Apply | 2 | | 1 | 1 | 0 | | | | |
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| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +LockingMerge | 3 | CREATE (s)-[anon_0:FRIENDS_WITH]->(s), LOCK(s) | 1 | 1 | 1 | | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(s) | 0 | 0 | 10 | 904 | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +Argument | 5 | s | 1 | 3 | 0 | 2280 | 2/0 | 0.460 | Fused in Pipeline 1 |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| +NodeIndexSeek | 6 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 1 | 1 | 2 | 376 | 1/0 | 0.211 | In Pipeline 0 |
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline | Indexes Used |
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+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| +ProduceResults | 0 | | 1 | 0 | 0 | 0 | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| +EmptyResult | 1 | | 1 | 0 | 0 | | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| +Apply | 2 | | 1 | 0 | 0 | | | | | |
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| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +ArgumentTracker | 6 | | 1 | 0 | 0 | 736 | | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +MergeInto | 3 | MERGE (s)-[anon_0:FRIENDS_WITH]->(s) | 1 | 1 | 1 | | | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +Argument | 4 | s | 1 | 1 | 0 | 2288 | 1/0 | 1.626 | Fused in Pipeline 1 | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| +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 |
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+--------------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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Total database accesses: 15, total allocated memory: 2232
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----
@@ -6022,7 +6022,7 @@ The `LockingMerge` operator is similar to the xref:planning-and-tuning/operators
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----
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PROFILE
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MATCH (s:Person {name: 'me'})
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MERGE (s)-[:FRIENDS_WITH]->(s)
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MERGE (s)-[:FRIENDS_WITH]->(:Person {name: 'you'})
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----
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.Query Plan
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Batch size 128
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline |
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| +ProduceResults | 0 | | 1 | 0 | 0 | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| +EmptyResult | 1 | | 1 | 0 | 0 | | | | |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| +Apply | 2 | | 1 | 1 | 0 | | | | |
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| |\ +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +LockingMerge | 3 | CREATE (s)-[anon_0:FRIENDS_WITH]->(s), LOCK(s) | 1 | 1 | 1 | | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(s) | 0 | 0 | 10 | 904 | | | |
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| | | +----+-------------------------------------------------------+----------------+------+---------+----------------+ | | |
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| | +Argument | 5 | s | 1 | 3 | 0 | 2280 | 2/0 | 0.460 | Fused in Pipeline 1 |
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| | +----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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| +NodeIndexSeek | 6 | RANGE INDEX s:Person(name) WHERE name = $autostring_0 | 1 | 1 | 2 | 376 | 1/0 | 0.211 | In Pipeline 0 |
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+-----------------+----+-------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+
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+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| Operator | Id | Details | Estimated Rows | Rows | DB Hits | Memory (Bytes) | Page Cache Hits/Misses | Time (ms) | Pipeline | Indexes Used |
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+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| +ProduceResults | 0 | | 0 | 0 | 0 | | | | | |
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| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| +EmptyResult | 1 | | 0 | 0 | 0 | | | | | |
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| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| +Apply | 2 | | 0 | 0 | 0 | | | | | |
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| |\ +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +LockingMerge | 3 | CREATE (anon_1:Person {name: $autostring_1}), (s)-[anon_0:FRIENDS_WITH]->(anon_1), LOCK(s) | 0 | 0 | 0 | | | | | |
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| | | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +Expand(Into) | 4 | (s)-[anon_0:FRIENDS_WITH]->(anon_1) | 0 | 0 | 0 | | | | | |
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| | | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+ | | +----------------------+
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| | +NodeIndexSeek | 5 | RANGE INDEX anon_1:Person(name) WHERE name = $autostring_1 | 0 | 0 | 0 | 128 | 0/0 | 0.000 | Fused in Pipeline 1 | |
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| | +----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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| +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 |
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+------------------+----+--------------------------------------------------------------------------------------------+----------------+------+---------+----------------+------------------------+-----------+---------------------+----------------------+
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Total database accesses: 15, total allocated memory: 2232
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Total database accesses: 1, total allocated memory: 584
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----
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======
@@ -7297,4 +7297,4 @@ Runtime version {neo4j-version}
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Total database accesses: 0, total allocated memory: 64
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----
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======
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======

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