Dynamic labels/types #1098

JPryce-Aklundh · 2024-11-05T09:06:03Z

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gem-neo4j · 2024-11-06T07:17:20Z

modules/ROOT/pages/clauses/create.adoc

+[[dynamic-create]]
+== CREATE nodes and relationships using dynamic node labels and relationship types
+
+Node labels and relationship types can be referenced dynamically in parameters and variables when creating nodes and relationships.


Should we say they can be dynamically calculated from expressions? Because it isn't only parameters and variables that are allowed

gem-neo4j · 2024-11-06T07:29:40Z

modules/ROOT/pages/clauses/match.adoc

+[[dynamic-match]]
+== MATCH nodes and relationships using dynamic node labels and relationship types
+
+Node labels and relationship types can be referenced dynamically in parameters and variables when matching nodes and relationships.


Same comment about expressions

gem-neo4j · 2024-11-06T07:32:49Z

modules/ROOT/pages/clauses/match.adoc

+WITH "Movie" AS label
+MATCH (movie:$all(label))
+RETURN movie AS movieNodes


I think if we are showcasing all explicitly then we should have more than one label and explain it is the conjunction

gem-neo4j · 2024-11-06T07:36:06Z

modules/ROOT/pages/clauses/match.adoc

+[NOTE]
+The xref:functions/predicate.adoc#functions-all[`all()`] function matches nodes that have all the specified labels.
+
+If passing a `LIST<STRING>` to an `all()` function evaluating a relationship pattern using dynamic relationship types, the list cannot contain more than one element.


It can, it just won't match on anything (emitting a warning is not the same as disallowed) :)

gem-neo4j · 2024-11-06T07:37:24Z

modules/ROOT/pages/clauses/match.adoc

+MATCH (n:$any(["Movie", "Person"]))-[:ACTED_IN|DIRECTED]->(m:Movie)
+RETURN labels(n) AS labels, n.name AS person, collect(m.title) AS movies


Maybe do a match without the relationship? then you don't have the non-dynamic part and the output can be just the nodes that are either movies or people

gem-neo4j · 2024-11-06T07:38:12Z

modules/ROOT/pages/clauses/match.adoc

+MATCH (n:$(<expr>))
+MATCH (n:$any(<expr>))
+MATCH (n:$all(<expr>))
+----
+
+.Syntax for matching relationship types dynamically
+[source, syntax]
+----
+MATCH ()-[r:$(<expr>))]->()
+MATCH ()-[r:$any(<expr>)]->()
+MATCH ()-[r:$all(<expr>))]->()


Can it be specified that all and not specifying one are the same meaning?

gem-neo4j · 2024-11-06T07:38:59Z

modules/ROOT/pages/clauses/merge.adoc

+[[dynamic-merge]]
+== MERGE nodes and relationships using dynamic node labels and relationship types
+
+Node labels and relationship types can be referenced dynamically in parameters and variables when merging nodes and relationships.


Same point about expressions

gem-neo4j · 2024-11-06T07:39:36Z

modules/ROOT/pages/clauses/merge.adoc

+MERGE ()-[r:$(<expr>)]->()
+----
+
+The expression must evaluate to a `STRING NOT NULL | LIST<STRING NOT NULL> NOT NULL` value.


Would be good to mention maybe that relationships can still only have one type, even if a list is supplied

gem-neo4j · 2024-11-06T07:40:43Z

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

+MATCH (movie:$($label))
+----
+
+[source, cypher, role="noheader"]
+----
+CREATE (movie:$($label))
+----
+
+[source, cypher, role="noheader"]
+----
+MERGE (movie:$($label))


I think it is important to show the relationship syntax as well, as that is one of the main new things about this feature (SET and REMOVE cover all node cases for dynamic labels already, so this is just syntactic sugar for them)

gem-neo4j · 2024-11-06T07:41:11Z

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

+CREATE (n:$(line.label) {name: line.Name})
+----
+
+| Added the ability reference node labels and relationship types in xref:clauses/match.adoc#dynamic-match[`MATCH`], xref:clauses/create.adoc#dynamic-create[`CREATE`], and xref:clauses/merge.adoc#dynamic-merge[`MERGE`] clauses.


Suggested change

| Added the ability reference node labels and relationship types in xref:clauses/match.adoc#dynamic-match[`MATCH`], xref:clauses/create.adoc#dynamic-create[`CREATE`], and xref:clauses/merge.adoc#dynamic-merge[`MERGE`] clauses.

| Added the ability to dynamically reference node labels and relationship types in xref:clauses/match.adoc#dynamic-match[`MATCH`], xref:clauses/create.adoc#dynamic-create[`CREATE`], and xref:clauses/merge.adoc#dynamic-merge[`MERGE`] clauses.

gem-neo4j · 2024-11-11T14:26:45Z

modules/ROOT/pages/clauses/create.adoc

+.Syntax for creating nodes and relationships dynamically
+[source, syntax]
+----
+CREATE (n:$(<expr>)),


Suggested change

CREATE (n:$(<expr>)),

CREATE (n:$(<expr>))

gem-neo4j · 2024-11-11T14:27:04Z

modules/ROOT/pages/clauses/merge.adoc

+.Syntax for merging nodes and relationships dynamically
+[source, syntax]
+----
+MERGE (n:$(<expr>)),


Suggested change

MERGE (n:$(<expr>)),

MERGE (n:$(<expr>))

into dynamic2

gem-neo4j

Looks good! Do we want to mention the performance issues with MATCH/MERGE?

gem-neo4j · 2024-11-19T12:34:33Z

modules/ROOT/pages/clauses/create.adoc

@@ -205,10 +205,61 @@ Nodes created: 2 +
 Properties set: 4
 |===

+[role=label--new-5.26]
+[[dynamic-create]]
+== CREATE nodes and relationships using dynamic node labels and relationship types


This is a really long title, is it possible to make it shorter?

CREATE using dynamic node labels and relationship types perhaps?

gem-neo4j · 2024-11-19T12:38:14Z

modules/ROOT/pages/clauses/match.adoc

@@ -490,3 +492,124 @@ The above query uses the xref:functions/aggregating.adoc#functions-collect[`coll

 For more information about how Cypher queries work, see xref:clauses/clause-composition.adoc[].

+[role=label--new-5.26]
+[[dynamic-match]]
+== MATCH nodes and relationships using dynamic node labels and relationship types


Similarly here:

MATCH using dynamic node labels and relationship types

gem-neo4j · 2024-11-19T12:40:20Z

modules/ROOT/pages/clauses/match.adoc

+----
+
+[NOTE]
+The xref:functions/predicate.adoc#functions-any[`any()`] function matches nodes that have any of the specified labels.


This sounds like the any in the match is the any() function, but it isn't. It's behaviour is modeled off of the any function, but it is not identical, so maybe clarify this part a little more

gem-neo4j · 2024-11-19T12:44:40Z

modules/ROOT/pages/clauses/merge.adoc

+
+[role=label--new-5.26]
+[[dynamic-merge]]
+== MERGE nodes and relationships using dynamic node labels and relationship types


MERGE using dynamic node labels and relationship types

into dynamic2

neo-technology-commit-status-publisher · 2024-11-19T13:38:35Z

Thanks for the documentation updates.

The preview documentation has now been torn down - reopening this PR will republish it.

gem-neo4j

Great!

Co-authored-by: Stefano Ottolenghi <[email protected]>

JPryce-Aklundh added 5 commits October 30, 2024 14:42

match and some of create

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Merge branch 'dev' into dynamic2

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JPryce-Aklundh added 5.26 cherry-pick-this-to-cypher-25 labels Nov 5, 2024

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JPryce-Aklundh marked this pull request as draft November 5, 2024 09:17

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JPryce-Aklundh added 2 commits November 12, 2024 09:14

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JPryce-Aklundh marked this pull request as ready for review November 14, 2024 13:41

JPryce-Aklundh and others added 6 commits November 14, 2024 15:24

query fix attempt

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Merge branch 'dynamic2' of https://github.com/JPryce-Aklundh/docs-cypher

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JPryce-Aklundh added 2 commits November 19, 2024 14:36

add performance note and fix long headers

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gem-neo4j approved these changes Nov 19, 2024

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JPryce-Aklundh merged commit d6b2f98 into neo4j:dev Nov 19, 2024
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JPryce-Aklundh added a commit to JPryce-Aklundh/docs-cypher that referenced this pull request Nov 19, 2024

Dynamic labels/types (neo4j#1098)

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Co-authored-by: Stefano Ottolenghi <[email protected]>

gem-neo4j pushed a commit to gem-neo4j/docs-cypher that referenced this pull request Nov 28, 2024

Dynamic labels/types (neo4j#1098)

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Co-authored-by: Stefano Ottolenghi <[email protected]>

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Dynamic labels/types #1098

Dynamic labels/types #1098

JPryce-Aklundh commented Nov 5, 2024

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neo-technology-commit-status-publisher commented Nov 19, 2024 •

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		MATCH (n:$any(["Movie", "Person"]))-[:ACTED_IN\|DIRECTED]->(m:Movie)
		RETURN labels(n) AS labels, n.name AS person, collect(m.title) AS movies

	\| Added the ability reference node labels and relationship types in xref:clauses/match.adoc#dynamic-match[`MATCH`], xref:clauses/create.adoc#dynamic-create[`CREATE`], and xref:clauses/merge.adoc#dynamic-merge[`MERGE`] clauses.
	\| Added the ability to dynamically reference node labels and relationship types in xref:clauses/match.adoc#dynamic-match[`MATCH`], xref:clauses/create.adoc#dynamic-create[`CREATE`], and xref:clauses/merge.adoc#dynamic-merge[`MERGE`] clauses.

Dynamic labels/types #1098

Dynamic labels/types #1098

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neo-technology-commit-status-publisher commented Nov 19, 2024 • edited Loading

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