2025.10 release

antora.yml

@@ -7,4 +7,4 @@ nav:
 - modules/ROOT/content-nav.adoc
 asciidoc:
   attributes:
-    neo4j-version: '2025.09'
+    neo4j-version: '2025.10'

modules/ROOT/content-nav.adoc

@@ -64,6 +64,7 @@
 ** xref::values-and-types/spatial.adoc[]
 ** xref::values-and-types/lists.adoc[]
 ** xref::values-and-types/maps.adoc[]
+** xref::values-and-types/vector.adoc[]
 ** xref:values-and-types/graph-references.adoc[]
 ** xref::values-and-types/working-with-null.adoc[]
 ** xref::values-and-types/casting-data.adoc[]

modules/ROOT/pages/appendix/gql-conformance/additional-cypher.adoc

@@ -52,11 +52,14 @@ Either the pattern already exists, or it needs to be created.
 | Cypher feature
 | Description
 
+| xref:values-and-types/maps.adoc#query-operators-list[`MAP` values].
+| Map values - the GQL equivalent is Records.
+
 | xref:values-and-types/spatial.adoc[`POINT` values]
 | Spatial values.
 
-| xref:values-and-types/maps.adoc#query-operators-list[`MAP` values].
-| Map values - the GQL equivalent is Records.
+| xref:values-and-types/vector.adoc[`VECTOR<TYPE>(DIMENSION)` values]
+| Vector values, defined with a coordinate type and dimension.
 
 |===
 

modules/ROOT/pages/constraints/syntax.adoc

@@ -19,7 +19,7 @@ If a name is not explicitly given, a unique name will be auto-generated.
 [NOTE]
 Creating a constraint requires the link:{neo4j-docs-base-uri}/operations-manual/current/authentication-authorization/database-administration/#access-control-database-administration-constraints[`CREATE CONSTRAINT` privilege].
 
-The `CREATE CONSTRAINT` command is optionally idempotent. 
+The `CREATE CONSTRAINT` command is optionally idempotent.
 This means its default behavior is to throw an error if an attempt is made to create the same constraint twice.
 With the `IF NOT EXISTS` flag, no error is thrown and nothing happens should a constraint with the same name or same schema and constraint type already exist.
 It may still throw an error if conflicting data, indexes, or constraints exist.
@@ -122,6 +122,7 @@ Where `<TYPE>` is one of the following property types:
 * `ZONED DATETIME`
 * `DURATION`
 * `POINT`
+* `VECTOR<TYPE>(DIMENSION)` label:cypher[Cypher 25 only] label:new[Introduced in Neo4j 2025.10]
 * `LIST<BOOLEAN NOT NULL>`
 * `LIST<STRING NOT NULL>`
 * `LIST<INTEGER NOT NULL>`
@@ -135,6 +136,11 @@ Where `<TYPE>` is one of the following property types:
 * `LIST<POINT NOT NULL>`
 * Any closed dynamic union of the above types, e.g. `INTEGER | FLOAT | STRING`.
 
+[NOTE]
+Because storing lists of xref:values-and-types/vector.adoc[`VECTOR`] values is not supported, property type constraints cannot be created for `LIST<VECTOR<TYPE>(DIMENSION) NOT NULL>`.
+Additionally, `VECTOR` property type constraints must be created with a specific dimension and coordinate value, where the dimension must be greater than `0` and less than or equal to `4096`.
+For more information, see xref:values-and-types/vector.adoc[Values and types -> Vectors].
+
 Allowed syntax variations of these types are listed in  xref::values-and-types/property-structural-constructed.adoc#types-synonyms[Types and their synonyms].
 
 For examples on how to create property type constraints, see  xref:constraints/managing-constraints.adoc#create-property-type-constraints[Create, show, and drop constraints -> Create property type constraints].
@@ -310,4 +316,4 @@ This means its default behavior is to throw an error if an attempt is made to dr
 With the `IF EXISTS` flag, no error is thrown and nothing happens should the constraint not exist.
 Instead, an informational notification is returned detailing that the constraint does not exist.
 
-For examples on how to drop constraints, see  xref:constraints/managing-constraints.adoc#drop-constraint[Create, show, and drop constraints -> DROP CONSTRAINT].
+For examples on how to drop constraints, see  xref:constraints/managing-constraints.adoc#drop-constraint[Create, show, and drop constraints -> DROP CONSTRAINT].

modules/ROOT/pages/deprecations-additions-removals-compatibility.adoc

@@ -22,6 +22,123 @@ Cypher 25 was introduced in Neo4j 2025.06 and can only be used on Neo4j 2025.06+
 Features removed in Cypher 25 are still available on Neo4j 2025.06+ databases either by prepending a query with `CYPHER 5` or by having Cypher 5 as the default language for the database.
 For more information, see xref:queries/select-version.adoc[].
 
+
+[[cypher-deprecations-additions-removals-2025.10]]
+== Neo4j 2025.10
+
+=== New in Cypher 25
+
+[cols="2", options="header"]
+|===
+| Feature
+| Details
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher]
+----
+VECTOR([1.05, 0.123, 5], 3, FLOAT32 NOT NULL)
+----
+
+a| Introduced a `VECTOR` value type that can be stored as xref:indexes/semantic-indexes/vector-indexes.adoc#embeddings[embedding] properties on nodes and relationships and utilized for efficient semantic retrieval using Neo4j's xref:indexes/semantic-indexes/vector-indexes.adoc[vector indexes] and xref:genai-integrations.adoc[GenAI plugin].
+For more information, see xref:values-and-types/vector.adoc[Values and types -> Vectors].
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher]
+----
+WITH vector([1, 2, 3], 3, INTEGER) AS vector
+RETURN vector, valueType(vector) AS vectorType
+----
+
+a| New xref:functions/vector.adoc#functions-vector[`vector()`] function for the construction of xref:values-and-types/vector.adoc[`VECTOR`] values.
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher]
+----
+RETURN vector_dimension_count(vector([1, 2, 3], 3, INTEGER)) AS size
+----
+
+a| New xref:functions/vector.adoc#functions-vector_dimension_count[`vector_dimension_count()`] function, which returns the dimension of a xref:values-and-types/vector.adoc[`VECTOR`] value.
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher]
+----
+RETURN vector_distance(vector([1, 2, 3], 3, INT), vector([1, 2, 4], 3, INT), COSINE) AS distance
+----
+
+a| New xref:functions/vector.adoc#functions-vector_distance[`vector_distance()`] function, which returns the distance between two xref:values-and-types/vector.adoc[`VECTOR`] values based on the selected `vectorDistanceMetric` algorithm.
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher]
+----
+RETURN vector_norm(vector([1.0, 5.0, 3.0, 6.7], 4, FLOAT), EUCLIDEAN) AS norm
+----
+
+a| New xref:functions/vector.adoc#functions-vector_norm[`vector_norm()`] function, which returns the distance between the given vector and an origin vector, which is a vector with the same dimension with all coordinates set to zero, calculated using the specified `vectorDistanceMetric`.
+
+a|
+label:functionality[]
+label:new[]
+[source, cypher, role="noheader"]
+----
+CREATE CONSTRAINT node_vector_constraint
+FOR (n:Movie) REQUIRE n.embedding IS :: VECTOR<INT32>(42)
+----
+
+[source, cypher, role="noheader"]
+----
+CREATE CONSTRAINT rel_vector_constraint
+FOR ()-[r:CONTAINS]->() REQUIRE r.embedding IS :: VECTOR<FLOAT32>(1536)
+----
+
+a| Introduced `VECTOR` property type constraints.
+For more information, see xref:constraints/managing-constraints.adoc#create-property-type-constraints[Create property type constraints].
+
+|===
+
+=== Updated in Cypher 25
+
+[cols="2", options="header"]
+|===
+| Feature
+| Details
+
+a|
+label:functionality[]
+label:updated[]
+[source, cypher]
+----
+RETURN toFloatList(Vector([1, 2, 3], 3, INTEGER64)),
+       toIntegerList(Vector([1, 2, 3], 3, INTEGER8)),
+       vector.similarity.cosine(vector([3, 5, 7], 3, INT), vector([-1, -2, -3], 3, INT)),
+       vector.similarity.euclidean(vector([3, 5, 7], 3, INT), vector([-1, -2, -3], 3, INT))
+----
+
+a| The xref:functions/list.adoc#functions-tofloatlist[`toFloatList()`], xref:functions/list.adoc#functions-tointegerlist[`toIntegerList()`], xref:functions/vector.adoc#functions-similarity-cosine[`vector.similarity.cosine()`], and xref:functions/vector.adoc#functions-similarity-euclidean[`vector.similarity.euclidean()`] functions now accept `VECTOR` values as input arguments.
+
+a|
+label:functionality[]
+label:updated[]
+[source, cypher]
+----
+RETURN datetime('11/18/1986', "MM/dd/yyyy") AS dt
+----
+
+| The following constructors of temporal types have been extended with the optional argument `pattern`:
+xref:functions/temporal/index.adoc#functions-date[date()], xref:functions/temporal/index.adoc#functions-datetime[datetime()], xref:functions/temporal/index.adoc#functions-localdatetime[localdatetime()], xref:functions/temporal/index.adoc#functions-localtime[localtime()], xref:functions/temporal/index.adoc#functions-time[time()] and xref:functions/temporal/duration.adoc#functions-durations[duration()].
+These patterns are the same as those used to create temporal strings with the xref:functions/temporal/format.adoc[`format()`] function introduced in 2025.09 and thus allow for the parsing of temporal strings into temporal values.
+|===
+
+
 [[cypher-deprecations-additions-removals-2025.09]]
 == Neo4j 2025.09
 
@@ -43,7 +160,7 @@ RETURN format(dt, "MM/dd/yyyy") AS US, format(dt, "dd/MM/yyyy") AS EU
 
 | Cypher's new xref:functions/temporal/format.adoc[`format()`] function can create dynamically formatted string representations of temporal instance and duration types.
 
-a| 
+a|
 label:functionality[]
 label:new[]
 
@@ -94,7 +211,7 @@ label:functionality[]
 label:updated[]
 [source, cypher]
 ----
-PROFILE 
+PROFILE
 WITH "Person" AS label
 MATCH (people:$(label))
 RETURN people.name
@@ -118,7 +235,7 @@ label:new[]
 ----
 MATCH (()-->(n))+
 WHERE allReduce(acc = 0, node IN n \| acc + node.x, 6 < acc < 30)
-RETURN [i IN n \| i.x] AS sequence 
+RETURN [i IN n \| i.x] AS sequence
 ORDER BY head(n).x, size(n)
 ----
 
@@ -151,7 +268,6 @@ RETURN n:$(<expr3>)
 | Added the ability to dynamically reference node labels and relationship types in places where xref:patterns/reference.adoc#label-expressions[label expressions] are allowed.
 |===
 
-
 [[cypher-deprecations-additions-removals-2025.06]]
 == Neo4j 2025.06
 
@@ -492,10 +608,10 @@ label:new[]
 ----
 CREATE ALIAS `remote-with-default-language`
 FOR DATABASE `northwind-graph-2020`
-	AT "neo4j+s://location:7687"
-	USER alice
-	PASSWORD 'example_secret'
-	DEFAULT LANGUAGE CYPHER 25
+    AT "neo4j+s://location:7687"
+    USER alice
+    PASSWORD 'example_secret'
+    DEFAULT LANGUAGE CYPHER 25
 ----
 
 a| Set the default Cypher version for a remote database alias when creating it.
@@ -917,7 +1033,7 @@ CASE x ... WHEN contains - 1 THEN ... END
 a| Using a variable named `contains` (or any casing variant, like `CONTAINS`) in addition or subtraction operations within a `WHEN` operand of a xref:expressions/conditional-expressions.adoc#case-simple[simple `CASE`] expression is deprecated.
 To continue using variables with this name, use backticks to quote the variable name:
 
-* Additions: `CASE x ... WHEN ++`contains`++ + 1 THEN ... END` 
+* Additions: `CASE x ... WHEN ++`contains`++ + 1 THEN ... END`
 * Subtractions: `CASE x ... WHEN ++`contains`++ - 1 THEN ... END`
 
 a|
@@ -932,8 +1048,8 @@ CASE x ... WHEN in["abc"] THEN ... END
 ----
 a| Using the `[]` operator on a variable named `in` (or any casing variant, like `IN`) within a `WHEN` operand of a xref:expressions/conditional-expressions.adoc#case-simple[simple `CASE`] expression is deprecated.
 To continue using variables with this name, use backticks to quote the variable name:
-	
-* `CASE x ... WHEN ++`in`++[1] THEN ... END` 
+
+* `CASE x ... WHEN ++`in`++[1] THEN ... END`
 * `CASE x ... WHEN ++`in`++["abc"] THEN ... END`
 
 
@@ -1132,7 +1248,7 @@ label:functionality[]
 label:updated[]
 [source, cypher, role="noheader"]
 ----
-CREATE (n:Label {property: 'name'}), 
+CREATE (n:Label {property: 'name'}),
 ()-[r:REL_TYPE]->()
 ----
 | Neo4j's link:{neo4j-docs-base-uri}/operations-manual/current/database-internals/store-formats/#store-format-overview[block format] now implements xref:appendix/gql-conformance/index.adoc[GQL's] limit on the maximum length of identifiers.
@@ -1183,7 +1299,7 @@ RETURN t AS team, players
 
 [source, cypher, role="noheader"]
 ----
-OPTIONAL CALL db.labels() YIELD label 
+OPTIONAL CALL db.labels() YIELD label
 RETURN label
 ----
 
@@ -1534,7 +1650,7 @@ MATCH SHORTEST 2 GROUPS (:A)-[:R]->{0,10}(:B)
 
 a| Introduced new graph pattern matching keywords to find variations of the xref:patterns/shortest-paths.adoc[shortest paths] between nodes.
 
-a| 
+a|
 label:functionality[]
 label:new[]
 
@@ -4732,4 +4848,4 @@ MATCH (n:N {prop1: 42} WHERE n.prop2 > 42)
 a|
 New syntax that enables inlining of `WHERE` clauses inside node patterns.
 
-|===
+|===